Dan Ferrell writes about do-it-yourself auto maintenance and also repair. He has certifications in automation and also control technology.

You are watching: Radiator fan turns on when car starts


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Cooling fan problems can be difficult to diagnose, relying on your vehicle model and also the kind of failure. Still, you can avoid lot of the confusion making use of a troubleshooting plan. If your electric radiator pan isn't coming on after the engine reaches operating temperature—the vital here is operating temperature (more on this later)—you have the right to bet there's something wrong v the fan assembly itself, the circuit, or among its components. This guide walks girlfriend through some of the most typical electric cooling fan troubles to aid you troubleshoot and also identify the trouble when the fan refuses come work, or functions intermittently.On older vehicle models, the fan circuit is simple, and you may not have actually trouble locating operating components or the error itself.Modern vehicles use the electronic manage module (ECM-car computer), powertrain manage module (PCM), or a dedicated fan manage module (or both) to control the procedure of the radiator fan, and can be little more complex to troubleshoot sometimes.So, through newer car models, it's a great idea to have the automobile repair hands-on for your details make and also model ~ above hand, especially with fairly recent models. The manual describes the procedure of the cooling system, exactly how your cooling fan operates, and the sensors or switches your vehicle computer reads from to run the cooling fan. Besides, the hand-operated can assist you locate sensors, relays, switches and trace circuit wires as necessary. Haynes makes good aftermarket manuals.


If your engine is overheating and you suspect difficulties with the cooling fan, this guide offers you crucial troubleshooting tips, and also the measures to diagnose the most typical cooling fan failures friend are likely to encounter on your car.

If her cooling pan runs continuously, examine the pan relay or cooling fan temperature switch, or engine coolant temperature (ECT) sensor.

Before going right into the important steps come troubleshoot the fan in your vehicle, though, a brief fan operation summary follows.

In This Article:

Cooling fan Operation

Troubleshooting Shortcuts

Cooling pan Troubleshooting

Has her Cooling Fan in reality Failed?How to test the Cooling pan MotorChecking Wires, Connectors and Related ComponentsTesting the Cooling fan Temperature SwitchTesting a Cooling fan Relay

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Cooling pan helps control engine and other components temperature in the engine compartment.

Photo courtesy that EvelynGiggles on Wikimedia


How the Cooling fan Works

If the cooling system in your vehicle uses an electric cooling fan, most likely you have actually a transversal (sideways) mounted engine. However, part longitudinal (front come rear) an installed engines use the electric fan as well, but they usually have an engine-powered cooling fan. The electric cooling fan offers a direct present (DC) electric motor through a thermo switch, module or computer control to turn it ~ above or off, relying on coolant temperature or AC operating condition.On older fan circuits, the thermostatic move connects come battery strength on one side, and to the pan motor ~ above the other. However, on many '90s and also newer models the manage was passed to the auto computer or a committed module. Because that example, once coolant temperature changes, the thermo move reports this adjust to the computer through a voltage signal, i m sorry the computer or module offers to activate the cooling fan with a fan relay(s).An electric cooling pan not only helps save power by running only when the system needs to remove excess warmth away indigenous the engine, but helps shield various other sensitive circuits and also electronic components from warmth damage. Throughout the winter months, your radiator fan saves even more energy when enough cool wait flows with the radiator ~ above the highway.Even if your cooling pan doesn't have actually a complicated circuit, girlfriend still require to recognize where come look as soon as your fan doesn't work-related as expected. Next are some fan circuit vital points you need to examine when diagnosing troubles with your electric cooling fan.


Some Troubleshooting Shortcuts

1. If friend think the cooling pan isn't working due to the fact that your temperature gauge is describe overheating, open the hood, begin the engine, and also let that idle because that 15 come 20 minutes. If the fan comes on, friend may have a bad temperature sensor or gauge.2. A cooling pan temperature move (or sensor, in some vehicles) can likewise get stuck, which may reason the fan to operation continuously any kind of time you turn the ignition an essential on or begin the engine. Troubleshoot the switch.3. ~ above some modern vehicles, one ambient waiting temperature sensor, auto speed sensor, and other sensors may carry out input to the automobile computer to identify radiator fan operation. Top your vehicle repair hand-operated to examine the compelled sensors and switches.

Warning

On a heat engine, the fan may come on also if the engine is not running. As soon as working ~ above a warm engine or an engine that is running, keep your hands and also tools far from the pan blades and moving components.


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Troubleshooting your Cooling Fan

Troubleshooting a cooling pan that doesn't work have the right to be a relatively straightforward task at times. Usually, the difficulty resides with the fan motor itself, a thermo switch, relay, wire, or (less commonly) the computer or module itself.


1.Has the Cooling Fan in reality Failed?

On many contemporary vehicles, if you want to confirm whether your cooling fan is in working order, you can start the engine and also let that idle. Collection your air air conditioning to the MAX setup and turn it on. The cooling fan should come on instantly or within the next couple of minutes. ~ above older automobile models, just wait about 15 come 20 minutes for the engine come reach operation temperature. Then, the fan need to come on.

If the pan comes on as soon as the AC is to run at MAX, yet doesn't run when the engine is hot, examine the temperature sensor or switch that sends the signal to the computer or module to operate the fan. On modern-day vehicles, a negative sensor normally triggers the check engine light. Scan the computer for trouble codes, if necessary.If the fan stops working to come on, first check for a pan blown fuse or triggered breaker. Top top older auto models, friend may have actually a fusible link in the circuit. This is a item of wire within an insulated block that rubber. Girlfriend won't miss out on it. Grab the end of the fusible attach and shot to stretch it. If it stretches, the wire attach might be broken. Replace it.

CAUTION: If the fan fuse or fusible connect is blown, or the breaker has actually been triggered, the is possible the fan motor itself may be bad and also causing the fuses come blow. Replace the fuse or fusible link, or reset the breaker, and test the fan motor again. If the same difficulty appears and there's no wire causing a short circuit, replace the pan motor.NOTE: if the cooling fan doesn't come on once the engine has been operation for 20 minutes or more, make sure that coolant is reaching operating temperature, about 220°F (104°C). You might be dealing with a stuck-open thermostat. Inspect the temperature that the engine block and also radiator tank (the one the connects to the engine v the upper radiator hose) using a kitchen thermometer. Make sure that engine temperature reaches around 220°F (104°C) and also the radiator tank temperature rises appropriately (meaning warm coolant is being moved to the radiator). If temperature remains fairly steady approximately 200°F (93°C) or less, the temperature move or sensor might fail to cause the radiator fan on.


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2. How to test the Cooling pan Motor

If the fan stops working to come on, friend still can inspect the fan by connecting direct battery strength to it (while working and making test in the proximity of the fan, constantly stay clear and keep tools away from the fan).1. Unplug the pan wiring connector. Very closely examine the connector for corrosion or damage. If necessary, usage electrical contact cleaner to clean the connector. Make sure the wires are firmly attached come the connector and not damaged.2. Look in ~ the polarity of the wires causing the fan, identify power and ground (usually a black wire).3. making use of jumping wires, affix battery an unfavorable to the ground next of the fan connector and positive battery come the other wire. On part vehicles, the pan connector come with 3 terminals, two for strength (high and also low speed, check both) and also another for ground. Or you may have actually a four-wire terminal (high and also low speed and also two grounds, test each pair separately). Above your automobile repair hand-operated to identify each wire, if necessary.4. when you connect the pan to battery power, her fan have to start running.

If the fan doesn't occupational with direct battery power, study the terminal that plugs to the radiator pan connector. Look for corrosion and also damage. Then test because that incoming voltage in ~ the terminal through your digital multimeter (DMM). With the engine running and at operating temperature, touch the terminal positive and also ground v the particular multimeter probes, you should get running voltage (about 14V), indicating the fan must be running. If her test proves just arrive power, change the pan motor.Check for any type of blown fuses or a tripping breaker. If your discover a circuit swollen fuse or tripped breaker, the fan motor might be pulling too lot voltage, resulting in the fault. Inspect for a shorted cable or replace the fan motor.If the pan doesn't come on in ~ all, or operation noisy or at an abnormally short speed, replace the pan motor.

Still, top top some auto models, you can unplug the solitary wire connector from the coolant temperature switch to cause the cooling pan on, or by ground connection the wire utilizing a jumper wire while the vehicle is running. Simply keep in mind the your computer may collection a trouble code for a malfunctioning temperature switchThe video clip at the bottom that this write-up gives friend a visual guide to troubleshoot the temperature sensor and also fan motor.


3. Check Wires, Connectors and Related Components

If the cooling fan motor and fuses, breakers or fusible links seem to it is in in functioning order, it's time to inspect the circuit and related components. You might need come consult your car repair hands-on to find components and also wires in the circuit.Try to follow the pan wires back to the coolant temperature switch or cooling fan relay on modern-day vehicles. Carefully examine the wires for cut or damage.


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Sensor(s) in the cooling pan circuit handle the signal to turn on the cooling fan.

Photo courtesy of Sfoskett~commonswiki ~ above Wikipedia.


4. Experimentation the Cooling fan Temperature Switch

Consult your vehicle repair manual to situate the switch, if necessary. ~ above most modern vehicles (late '90s and newer), you are looking for the switch that connects to your car computer (powertrain computer), since there might be much more than one switch.You deserve to test the cooling fan temperature switch making use of a test light.1. affix your check light come battery ground. 2. Start and idle the engine, and backprobe the connector terminals with the test light. One of them have to turn on the test light.3. Wait for the engine to reach operation temperature. 4. currently backprobe the various other wire in ~ the connector. Your test light have to come on. Otherwise, the move is not working.NOTE: If your automobile repair manual offers you the cold and also hot Ohms (resistance) values for your temperature switch, you deserve to test it with a digital multimeter. Check switch resistance v the engine cold, and after idling the engine for 15 minutes. Revolve off the engine and also test again. Compare worths to the people on her manual. If girlfriend don't have actually the cold and hot worths for her switch, girlfriend still might want to test the switch and compare the difference in values. This will tell friend the move is still functioning somehow.Also, on more recent vehicles the coolant temperature sensor operates the A/C and the cooling fan. If your automobile repair manual offers the Ohms values at cold and hot condition, usage your voltmeter to check the temperature sensor, if necessary. If girlfriend don't have actually the sensor's resistance values yet you notice that Ohms stays pretty lot the exact same at cold and also hot, replace the sensor.


5. Testing a Cooling pan Relay

The easiest method to know whether your relay is leading to trouble is to replace it with an additional relay in your automobile you understand is functioning fine. Look in ~ the power center under the hood because that a similar relay the won't interfere with the correct procedure of your engine if swapped, prefer a home window or wiper relay.If swapping relays tho doesn't operate your cooling fan, make certain the relay is receiving strength from the computer.Consult her repair hand-operated to identify the cable that sends out power to the relay. Usually, there's strength to the relay also if the engine is off. You can use a check light to check for power here. Affix the check light cable to a good ground and probe the power terminal ~ above the relay socket. Revolve the ignition crucial to On, if necessary. The check light have to come on. If there's no power, there may be a fusible connector hooked come the power wire the is at fault, or the computer is not sending out power come the relay. Consult the circuit schematic on her repair manual to follow the wire earlier and save checking for voltage together necessary.If the relay is working, check the wire(s) and also fan connector because that damage.
When checking because that cooling pan problems, make certain the pan shroud and other original tools aim to enhance air flow approximately the engine in in place. Missing equipment can considerably reduce a radiator pan efficiency.

Many contemporary vehicle models have actually a lot more complicated cooling pan circuit the the ones defined here. Refer to your automobile repair manual to situate wires, components, and also modules, if necessary. Still, in some cases, you should make a diagnosis making use of a professional scan tool to inspect for voltage values and power inputs to the cooling pan to situate the resource of the problem.

This contents is accurate and also true to the best of the author’s knowledge and is not meant to substitute because that formal and also individualized advice native a default professional.

Questions & Answers

Question: my cooling pan is not working on overheating, yet it works v A/C. Why is this?


Answer: You might want to examine the coolant temperature sensor.

Question: I’ve changed the coolant temperature sensor and switched the fan relays and still no fan. I know my pan works cause when ns unplugged the sensor it came on. What could be the difficulty with my electric cooling fan?

Answer: Usually, the difficulty is with the fan control module. Check for trouble codes, also if the examine engine irradiate is not on. On rare cases, the problem is traced earlier to the car’s computer.

Question: Why would certainly a cooling fan run one day and also the next day the doesn't?

Answer: check the connections for a loose connection; also, the coolant temperature sensor might be faulty:

https://carolannpeacock.com/auto-repair/Coolant-Tempera...

Question: on a 2001 Honda Ex 4 cyl, which side is the condenser?

Answer: ns don't have actually the schematic with me, yet if i remember correctly, it's located to the left (driver's side). Friend can speak to your neighborhood dealer company department to confirm.

Question: will certainly a melted cooling fan 2 relay make my car go right into failsafe mode?


Answer: check the AC compressor. The overcharge that a faulty compressor or the circuit deserve to throw the computer system into for sure mode.

Question: top top a Toyota RAV4, the pan comes top top as shortly as you move ignition crucial on. What might be wrong?

Answer: There could be an open in the temperature circuit sensor. The Rev 4 might have the sensor in ~ the bottom tank of the radiator. If the sensor is plugged in, check the sensor and/or the wires. Also, it's possible the fan relay is stuck. You may need to check the relay:

https://carolannpeacock.com/auto-repair/how-to-test-rel...

Question: I have a 2000 Camry 2.2L. The cooling fans come on means too late: only as soon as the temp gauge is really high. Lock work normally with the AC on. The coolant temperature fan switch/sensor at the bottom of the radiator is brand-new and works as it have to in another comparable Camry (I switched it out to test). Any type of Ideas what might be leading to this?

Answer: Make sure there’s proper outside air flow through the radiator or condenser (usually bugs clogging passages). Examine that the shields around the radiator space in place. Also, a clogging radiator may be preventing ideal coolant flow.


Question: The fan on my 2011 Cruze come on when the auto is started and runs full speed and also never turn off off. It seems prefer my automobile has no warm as well. Any kind of ideas what the problem can be?

Answer: inspect the relays and the coolant temperature sensor. There can be a short in the circuit.

Question: On my 2008 Toyota Highlander, the cooling fan comes increase for about a minute and then goes turn off (mostly in ~ night) there is no the engine gift on and also often operation the battery down. What could be the cause of the cause, please?

Answer: The fan coming on through the engine turn off is typical in modern vehicles. But check the battery, there might be a negative cell, bring about a discharge.

Question: The fan on my vehicle started to rotate on also often. The is the very same temperature outside, and we space in the center of mild winter. Ns am not running aircon at the moment, no need. Is other on its way?

Answer: Make certain the car is not overheating, perhaps the water pump isn't functioning properly.

Question: mine 2006 G35 is not overheating, but when the automobile gets as much as operating temperature, both fans come ~ above high and also do not rotate off until I close up door the car off. What have to I look into to remedy this?


Answer: inspect the coolant pan relay and coolant temperature sensor.

Question: will certainly a vehicle overheat ~ above a lengthy distance trip with no cooling fan?

Answer: There can not be enough air circulation through the radiator come the engine, depending upon your model and the ar of the condenser.

Question: i am enduring a short on the condenser or cooling fan. What could be the problem? just how do I solve this?

Answer: Look up the electrical diagram on your vehiclr repair manual and used that as a guide -- If you don't have actually the manual, your regional library may have actually a copy.

Question: What would cause my cooling fans to remain on even when the automobile is cold?

Answer: Unplug the cooling temperature sensor. If the fan stops, change the sensor.

Question: I have actually a 1995 Ford Taurus GL station Wagon. The temperature provided to run about the middle of normal. Newly it climbed to the l in normal and also I had purged the system, adjusted both temperature sensors and the control module over the facility of the radiator, the radiator fan and the circuit breaker to the fan. I replaced the radiator about 3 month earlier. The only other thing I never ever replaced is the water pump?


Answer: If the thermostat is old, you may want to change it as well. You deserve to listen come the water pump with a size of hose and see if the bearing or noises come indigenous it. The impeller might be loose. Inspect the belt that runs the pump. That can likewise be a problem. Although no that common, the temperature gauge may also become faulty.

Question: mine 1995 Accord’s fan just runs after ns shut the motor off. I’ve changed the fan timing unit, switch, thermostat, and also tried swapping relays and topped it off after bleeding the coolant system. What carry out I carry out next?

Answer: maybe there's a difficulty with the thermocouple sensor. Yet you need to have the diagram because that the circuit and also follow the voltage to view where is or isn't going.

Question: Why does my radiator fan not revolve on instantly when the air-conditioner is on?

Answer: inspect that you still have actually refrigerant in the system. If it's an old system, there could be a leak as well.

Question: mine cooling fan is remaining on all the moment in my 2002 Lincoln city car. The battery is additionally dead. As soon as I hooked up the booster, the pan started. What could be the problem?


Answer: Usually, this is resulted in by a poor cooling temperature sensor. Shot unplugging the sensor and also see if the pan stops. If that does, change it. An additional problem might be a grounded cable or stuck relay. If necessary, examine the wiring diagram for your particular model and check the circuit.

Question: mine aux pan is not working, how should I fix it?

Answer: Check very first the fuses and relays for the fan's circuit. You may need the chart for her model. There might be a cable that's no getting existing behind the dash in between the AC and cluster.

Question: Why is my car's cooling pan still on after ~ I revolve my vehicle off?

Answer: that is common for the cooling fan to continue to be on, it help the engine come cool. Most modern-day vehicles has this configuration.

Question: I have actually 2003 Toyota corolla. Ns perceive a type of gas odor when the ac is cooling. The doesn't happen all the time. What might be the problem?

Answer: There can be several factors for this. Some of the most typical reasons for this kind of odors come indigenous a dirty, cabin air filter, mildew in the passageways (vents, evaporator); engine leaks can additionally produce this type of smell.


Question: I have actually a Chevrolet Aveo LT 2008. The fan is not transforming on low rate if the engine is on, also if the reaches the warmth indicated. Yet if you turn on the A/C, it will certainly come on. What could reason my Chevrolet's pan to only turn on through the A/C?

Answer: inspect the engine coolant sensor and the relay because that the low-speed circuit. There could be the problem.

Question: The fan goes to full blast when it turns on and also stays it spins I rotate it off, is that a sensor problem and if so which one?

Answer: This can be a sensor issue or a grounding relay problem. However it can additionally mean the engine is gaining a little too hot so the computer system is maintaining the fan on high. Make sure you don't have actually an overheating problem. Consult the repair hand-operated for your specific model, there can be a coolant temperature sensor, a different thermal switch, or a relay issue.

Question: I have Honda Accord 2003. It has actually an electrical radiator fan. The car has never overheated yet I feeling the radiator fan never comes on. Is this possible?

Answer: If the hasn't overheated, most most likely the pan is functioning fine, If you leave the engine idling and wait because that the pan to come on. It generally takes about 15 come 20 minutes.


Question: mine 2008 BMW 750i has actually 12 volts come the connector, also when the switch is off. What controls this?

Answer: There can be a quick in the circuit. It's feasible the trouble is v the temperature sender or the wire, which may supply the ground because that the relay. You'll require a wiring diagram to map the voltage ago and check this, though.

Question: Why does my 2012 Silverado volt gauge drop indigenous 14+v to about 12v as soon as the electric fan is running?

Answer: electric fans draw quite a little of amperage and it's possible for some alternators to lack a feeling of such high attract if it is no designed for it. Quiet the alternator should be placing out over 13 volts, also if your meter states otherwise. Check the alternator and also battery v a Voltmeter. Nevertheless of the form of charging system, there's constantly a autumn in voltage. Therefore most likely there's no problem with her alternator.

Question: My vehicle is a 2012 Toyota Ractis model. My cooling fan is not working correctly while AC running and AC is no cool. Why?

Answer: The inoperative cooling pan are causing the cooling system heat to rise. That’s why her AC is not cool. Had the AC system checked. It could be low on refrigerant or a poor relay, a sensor, an approximately temperature move or the AC pressure transducer is bad.


Question: mine 95 Cadillac DeVille, when I unplug the relay, the fuse blows to the engine coolant sensor. What is wrong?

Answer: inspect for a short in the circuit, probably about the relays area.

Question: us looked in the owners manual and also the 3 fuse boxes on my 2007 Saab 9.3 2.0T sedan. None of this tell united state which is for the radiator fan so we can’t examine it. How have the right to we find this fuse?

Answer: ns don’t recognize if these room the right ones for your model. But check the F35 fuse (I think is a 40 amp) and Maxi fuse 36 (engine only box), and also fan relay (don’t know specifically where it’s located). Also, you may want to examine out this page and also test the cooling sensor together described. Hope this helps.

https://www.thesaabsite.com/faqs/FAQ--heating-&...

Question: must a cooling fan connector switch gain hot to the touch?

Answer: not really, unless it's too close come a warm surface, most likely the engine or there some unwanted resistance. Examine the harness closely, look for indications of damages to the wires or the connector. And also make certain it's far from the engine.

Question: The Engine overheats yet the relay is not picking up. What might be the cause?


Answer: inspect the temperature switch and relay. Also, make sure they are gaining voltage.

Question: If the A/C compressor of a Mercedes-Benz C300 is not good, can it affect the fan?

Answer: Yes. The fan have to come on once the AC is working. There might be an issue with the compressor or refrigerant is as well low.

Question: I have a 2005 GMC 1500 truck. Cooling fan comes on as soon as the engine is cold, and also when i put key in the ignition and turn it to the on place (not start) the pan goes off. Ns take the vital back out and a few minutes later on the pan comes back on. The pan don’t come on once the engine is at complete temperature either. I readjusted the block temp sensor and relays and also nothing changed. What could be the problem?

Answer: over there is a brief in the circuit. You require the wiring diagram for your model to trace voltage in the circuit. You have the right to use one of two people a test light or multimeter.

This other article may help:

https://carolannpeacock.com/auto-repair/How-to-find-a-C...

Question: I have actually a 2003 Mercury Marauder. As soon as I revolve on the AC on in any type of setting, it doesn't perform anything. I changed the blower motor still nothing. Ns was thinking maybe the resistor however then a friend told me that if the radiator pan gets unplugged in which method or just stops working for part reason, that my AC would not occupational as well. Is this true?


Answer: The AC uses the coolant come dissipate heat. If the AC sensors detect the high temperature in the coolant, they'll save the AC off.

Question: I have a 2008 Mercedes GL 450. The cooling pan doesn't run also at a high temperature. Turn on the Airconditioner but still doesn't run. What is the problem?

Answer: check the fan switch (coolant temp sensor) and also the circuit. You may need the vehicle repair hands-on for your model to I.D. The wires.

Question: my engine cuts out when the cooling fan transforms on. It is a 1995 Ford Festiva. Why is this?

Answer: The problem might be in the cooling pan circuit, a faulty battery, or (less likely) the charging system. The pan motor might be pulling also much current or the circuit has actually too much resistance. Have those points checked first.

Question: I desire to know if the is feasible to convert a E46 BMW 330i cooling pan to revolve on at 70% and not 90%? I desire the pan to run before it gets to 90 degrees.

Answer: that is feasible to carry out this. The easiest means is to use digital pan controllers. But, climate again, the factory switch works in sync with ignition timing, fuel, oil temperature, and also many various other things to offer you far better engine performance and also minimum emissions. Girlfriend basically will certainly be reduce engine company life in my opinion.


Question: will a swollen fuse, (electric cooling fan) avoid my 2004 Lincoln Aviator from beginning up? mine tester declared there's a misfire detected on startup (first 1000 revolutions) P0316 generic.

Answer: This is usually prompted by a trouble in the fuel or ignition system. However, dual check and also make sure there's not an additional DTC in storage or a pending code. If you discover one, check on the area.

Question: my overheated sensor irradiate does not display when the auto is overheated and likewise does not start cooling fan in Chevrolet Spark 1.0 LS version 2008. However, as soon as A/C using then cooling fan start and also running repeatedly after the A/C is closed?

Answer: examine the circuit, there could be a quick to ground what in there.

Question: So once I acquire my 2008 GMC Acadia as much as temp v AC running and also when the cooling fan kicks right into high, it blows mine 30a fan 1 fuse. Once ii started, this fuse issue, both fan 1 30a, and fan 2 40a were blown. Now the 40a hasn't blown, and also its right now 80 levels out. What need to I do?

Answer: inspect the relays and also connectors because that the high-speed circuit. There could be a loose wire or the relay may be faulty.


Question: mine engine pan works when the ignition is off. Why is that? please help?

Answer: On part models, the cooling fan is configured to operation after the ignition is removed to remove extra warm from the engine. Due to the fact that coolant stop circulating and coolant may boil native engine heat, the fan blows air around to engine to help remove this extra heat. The fan might run for several minutes. This is normal.

Question: mine radiator fans are not working. They carry out if they space straight wired. We have replaced the relay and temperature sensor. Deserve to the AC push switch cause this? What else could it be?

Answer: Make certain the coolant temperature is getting to operating temperature (thermostat not stuck open); check fuses. The regulate module is an additional possibility. There could be another faulty relay or a difficulty in the wiring harness or connector. You may need to look in ~ the diagram because that your particular model to examine for other possibly relay or move in the circuit you are missing. Making use of a testlight can aid you trace voltage in the circuit.

Question: I have actually a 2009 kia Sedona. No cooling pan is working and also my AC compressor will certainly only communicate momentarily right when you start the car. It remains engaged until the time once the cooling fans space meant to come on. Then it disengages and won't reengage until I cycle the ignition. Throwing code p0480. Any kind of advice on whereby to start?


Answer: There can be a trouble with the cooling fan control module. Have actually it diagnosed very first before replacing any components.

Question: I just put a starter ~ above a 2010 Hyundai Veracruz and now the automobile is to run hot and windshield wipers won’t work. Why would certainly it it is in running warm ?

Answer: There could be numerous reasons why an engine may be to run hot. If the trouble started ideal after replacing the starter, check for a blown fuse. The wipers concern may or may not be concerned the problem. This other short article may help:

https://carolannpeacock.com/auto-repair/What-Causes-a-C...

Question: I have a 2006 Mercedes E350. The pan starts working as quickly as I start the engine, and it takes in ~ least five to 20 minutes for it come shut down after the engine is off. What can be the problem with my Mercedes engine fan?

Answer: There can be a bad coolant temperature sensor or a stuck AC relay.

https://carolannpeacock.com/auto-repair/Coolant-Tempera...

Question: I have a Toyota Vitz - KSP90. As soon as the cooling pan starts, the engine becomes an extremely wobbly, and it even tries to prevent the engine. After that is rotate off, idle rate becomes normal. What would certainly be the case, is it a bad alternator giving this problem or poor transmission oil?


Answer: have the alternator checked. It can not be responding properly once the load increases. Simply to make sure, check the charging circuit voltage drop, to watch the problem on the wires and also connectors.

https://hubpages.com/auto-repair/Charging-System.....

Another opportunity is a faulty fan motor.

Question: The Toyota computer system assembly theft warning mechanism is broken in mine Toyota Corolla. Is this a vast problem that i should shot to fix?

Answer: In some cases, relying on the fault, it may prevent you from beginning the engine or cause other issues. If necessary, inspect with your regional dealer if you are using one original device or a reputable independent shop.

Question: ns drive a 1987 Ford Tracer / Mazda 323 B3 engine model; no ECU, basic. The cooling fan was to run all the time. Now it doesn't start at all. Changed a puffy 30 amp fuse. Still nothing. If I offer the pan a slight push the pan spins. I have actually noticed the sensor is a bit corroded. Also, the auto travels follow me a really dusty clay road. Can the difficulty be v the sensor and a dirty fan? exactly how would ns go cleaning the fan?

Answer: It's possible the fan bearing is every dusty, and the brushes are sticking. Include some penetrating oil to the bearing and also see if that helps. You'll need to work on and test the fan external the vehicle. Change the sensor if it is corroded. Sometimes it's essential to obtain to the engine to execute a an ext complete job. This video clip may provide you one idea about servicing the fan:


https://www.youtube.com/watch?v=4NOmUekXrHA

Question: Why would my cooling fan no be functioning on mine 2005 Mitsubishi?

Answer: inspect the Troubleshooting Shortcuts and the Troubleshooting your Cooling pan sections in the post.

See more: Is The Covid 19 Vaccine Fda Approved, Comirnaty And Pfizer

Question: Why is mine car's fan no running at high speed once AC is turned on?

Answer: check the fan relays in the power box in the engine compartment. One of them might not be functioning properly.