Question about 1998 Chevrolet Cavalier

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2000 cavalier 2.2L cooling fan will not come on Fan works relay was replaced would thermostat cause the fan not to run or would it be a temp sensor?

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  • mike loshbough
    mike loshbough May 11, 2010

    what is the temperature of the engine?

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After you check the grond in the fan conector and all the fuses i can say its coolent temp sensor.

Posted on Mar 14, 2009

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Car overheated replaced thermostat/checked 30amp fuse to 78relay with wire fan came on. Is this meaning relay is bad due to fan came on?


That would depend upon where you placed the voltage on the relay. And even then not necessarily so. The only thing you verified with the test was that the fan itself is okay. The cooling fan relay is powered from the ECM (computer). The ECM will power the cooling fan whenever one of two conditions exists:

1. Engine temperature exceeds about 210 degrees F. his temp is determined by the coolant temperature sensor.
2. The A/C is turned on. The fans must run at all times when A/C is on.

So, with the engine running, turn on the A/C. If the cooling fan activates, then you know the ECM, relay, and fan is OK. If the fan then doesn't activate when the engine temp gets high, it is the coolant temperature sensor that is the culprit.

If the fan doesn't run when you turn on the A/C, then, since you know the fan works, try the relay next, because other than wiring, the only other item that could be wrong is the ECM (and you don't want to go there!)

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Cooling fan not kicking on


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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.

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My cooling fan will not come on at all. I've changed the temp sensor and if I wire the fan direct, it works. Otherwise, if I'm in traffic on a hot day, it will peg the temp gauge. Could it just be the...


Try changing the coolant temp senor...Its usually by the thermostat by the housing....Start up your car and let it run for a bit.....then unplug the electric plug from the sensor....If you unplug it and the fan comes on....that sensor is your problem. Or it could be your coolant fan relay.

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I have a 1999 chevy cavalier and the cooling fan will not start


CHECK COOLING FAN FUSE AND RELAY.IF BOTH GOOD SCAN CAR TO CHECK COOLANT TEMPERATURE SENSOR FAULT CODE.THE PCM AND COOLANT TEMP. SENSOR IS WHAT CAUSE FAN TO RUN AT CERTAIN TEMPERATURE.IF ALL IS GOOD.HOT WIRE COOLING FAN USING JUMPER WIRES TO BATTERY.IF FAN DONT RUN REPLACE FAN MOTOR.IF FAN RUNS YOU HAVE SHORT OR BROKE WIRE IN THE COOLING FAN ELECTRICAL CONNECTOR.

May 06, 2010 | 1999 Chevrolet Cavalier

1 Answer

Have a 2002 cavalier Z24 and the cooling fan will not go on. Have a hard code on the engine saying Cooling Fan 1 Control Circuit. checked all the fuses and the relay, all are fine. what might the problem...


there are two coolant temp sensors on this car one controls the fans and one controls the temp guage in the car. one is located near the thermostat housing and the other is usually located in the block. the one near the thermostat housing usually controls the fans. also try to jumper the fan and make sure the fan is working.

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My 1987 Chevrolet Z24 Cavalier cooling fan will


since you have already tested fan and relay and both work, the problem may be the engine temp sensor. There are two sensors. One goes to instument cluster. This is engine coolant temp sensor, the other is engine temp sensor which is usually attached to engine block, sometimes they are connected to thermostat housing with the coolant sensor. You can pully the engine temp sensor and test that sensor same way as relay. (with mulitimeter)

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Cooling fan not coming on. 1985 chevy cavalier 2.0L


I'm not familiar with your exact car but a friend of mine had a similar problem the solution was to replace the electrical relay for the cooling fan. Consult a wiring diagram to see if there is a relay (there should be) and replace it.

The other possibility off the top of my head is a short in the wiring somewhere. Power the fan directly and ensure it works fine. If the fan is OK then the problem is likely in the wiring or wire connectors somewhere. That should help narrow down the problem. Good luck!

Dec 14, 2008 | 1985 Chevrolet Cavalier

1 Answer

Cooling fan wont work


The water temp sensor is located near the thermostat housing. This sensor is what tells the ECM to turn the fan on/off. The water temp sending unit is located near the same area. You know you have the correct sensor is because the water temp sensor has a 2 prong plug. The water temp sending unit only has 1 prong.

Sep 26, 2008 | 1998 Chevrolet Cavalier

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