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Cooling fan not turning on when hot - Cavalier Chevrolet Cars & Trucks

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Have you checked the relay and fuse?

Posted on Aug 25, 2010

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Car gets hot pretty quick and will overheat, noticed fans arent coming on when car is hot or if I turn a/c on. Have caught them running recently but didnt catch it again.


it could be the cooling fan relays or possibly the cooling fans. to check the fans disconnect the plug at the fans and run jumper wires to them both power and ground. if they don`t work then the fans are bad. check voltage and grounds at the plugs when they should be running, if they are good then the wiring is good. it could also be the coolant sensor for the fans that send the signal from the sensor to the computer so it knows when to turn on the fans. the fan that runs with the A/C when turned on could be the A/C relay.

Sep 10, 2015 | 2003 Dodge Intrepid

1 Answer

Fan comes on when switch ignition on instead of when hot Tazz


If the fan not turning on when car engine getting hot,then car will notice overheating.Click this link below for troubleshooting:---http://technoanswers.blogspot.in/2012/02/car-running-hot.html--------To know how engine cooling system works ,click the link below :----Engine cooling components working?

http://repairhelpcenter.blogspot.com/2011/11/engine-cooling-components-working.html

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How does Vehicles Engine cooling system works? http://repairhelpcenter.blogspot.com/2011/11/how-does-vehicles-engine-cooling-system.html
------------How to Replace Engine cooling Fan:-- http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-engine-cooling-fan-on.html
-----------Replace Fan Relay but still Radiator cooling fans not working? http://schematicsdiagram.blogspot.com/2011/12/replace-fan-relay-but-still-radiator.html
----------DIC says "COOLING FAN FAULT"? http://schematicsdiagram.blogspot.com/2011/12/dic-says-cooling-fan-fault.html
---------Where Is Radiator Fan relay and Fuse Located?

http://schematicsdiagram.blogspot.com/2011/12/where-is-radiator-fan-relay-and-fuse.html

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This will help.

Thanks.

Feb 09, 2012 | Cars & Trucks

1 Answer

I have a 1994 chevy cavalier 2.2L engine. the engine fan does not turn on causing the car to over heat. What makes the fan turn on, is it a thermostat or a fuse?


REPLACE THERMOSTAT BUT IT SOUND LIKE FAULTY COOLANT TEMPERATURE SENSOR.BUT CHECK COOLING FAN FUSE AND RELAY.IF ALL IS GOOD HOT WIRE COOLING FAN IF COOLING FAN WORKS.PROBLEM COULD BE FAULTY COOLANT TEMPERATURE SENSOR. DAMAGE FAN WIRING OR FAULTY PCM.IF COOLING FAN DONT RUN WHEN HOT WIRED.REPLACE FAN AND MOTOR.

Feb 20, 2011 | 1994 Chevrolet Cavalier

1 Answer

How do i check the cooling fan my car is over heating


HOT WIRE COOLING FAN USING JUMPER WIRES TO BATTERY.IF FAN DONT RUN WHEN HOT WIRED FAN MOTOR BAD NEED REPLACING. IF FAN RUN WHEN HOT WIRED. CHECK COOLING FAN FUSE AND RELAY.IF ALL IS GOOD.YOUR ENGINE COOLANT TEMPERATURE SENSOR NOT WORKING.IT CONTROL COOLING FAN AT SET TEMPERATURE IF SENSOR OPEN OR FAULTY THE COOLING FAN WONT TURN ON.CHECK COOLING FAN WIRES FOR DAMAGE.IF ALL STILL CHECK OUT GOOD HAVE VECHICLE SCANNED FOR PCM FAULT.IF IT FAILS NO COOLING FAN WONT TURN ON.

Dec 13, 2010 | Hyundai Elantra Cars & Trucks

2 Answers

It has an overheating problem. I changed the


SOUND LIKE COOLING FANS NOT RUNNING CHECK AND SEE DOES COOLING FANS TURN ON WHEN ENGINE OVERHEATS IF NOT CHECK COOLING FANS FUSE AND RELAY IF BOTH CHECKS OUT GOOD HOT WIRE COOLING FAN.IF IT WORKS.PROBLEM COULD BE COOLANT TEMPERATURE SENSOR- PCM- AND OPEN OR SHORT IN WIRES.IF COOLING FAN DONT WORK WHEN YOU HOT WIRE IT PROBLEMS THE FAN MOTOR.

May 27, 2010 | 2001 Chevrolet Malibu

1 Answer

Car runs hot


If it was the thermostat, it would run hot all the time. Sounds more like the electric cooling fans are not working. Either the fans themselves are not working, or the coolant temperature sensor is bad and not sending a signal to the computor to turn them on. Have the fans checked first, then go for the sensor if it isn't the fans.

Apr 11, 2010 | 2003 Chevrolet Impala

2 Answers

Both radiator cooling fans won't turn on vehicle overheats


The fans come on only when hot or the AC is on. There are many fuses that have to be good for it to work. The fan relay should have 2 pins hot with the key on, The other 2 should be ground. with the key off one should be hot and the other can then be ground the other pins that are ground one of them is the fan. the other becomes ground when the computer turns the fans on. If you don't have a pin thats hot at the relay all the time then theres a blown fuse or even the power wire from the battery at the battery

Nov 02, 2009 | 1994 Buick Roadmaster

1 Answer

Radiator Cooling Fan is not turning on when engine is hot.


HOT WIRE THE COOLING FAN USING CAR BATTERY AND JUMPER WIRE.IF FAN DONT RUN WHEN HOT WIRE REPLACE FAN.THE ELECTRIC MOTOR BURN OUT.IF FAN RUN WHEN YOU HOT WIRE IT.THE PROBLEM IS THE FAN RELAY OR OPEN COOLANT TEMPERATURE SENSOR

Sep 03, 2009 | 2002 Kia Rio

1 Answer

2000 jimmy a/c blows hot computer controlled a/c button light was blue when working now yellow and blowing hot just charged system no change


check to see if ac compressor is turning ,if so look to see if cooling fan/fans are working if not check fuses,and cooling fan relays/if ac is turning and cooling fan/fans are working ,need to put gauges on ac system and check pressures ,if normal ,and ac low side pipe/lines/hoses are cols then it is ur actuator motor for the temp door that is not working

Jul 08, 2009 | 2000 GMC Jimmy

1 Answer

Cooling fan fails to turn on so it gets too hot in traffic


because its air cooling need to check the temp switch and the relays for the fan under your hood

May 16, 2009 | 2000 Pontiac Montana

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