a fuse or a bad fan motor
you need to check cooling fans with ac on
there is a Senior that kick it the fans on it is located under the throttle body or it might be the primary fan is bad and only the second fan is working
temperature sensor, fan relay, or fans themselves are bad.
Low coolant? Cooling fans not working? Water pump not circulating coolant? Radiator plugged or restricted?
The cooling fans turn on utilizing a temperature sensor and a relay. When the engine gets to a certain temperature the temp sensor closes and the cooling fans come on. Check fuses first. If you have a 12 volt test light, hook up the test light to the connector that goes to the cooling fans once the engine is warmed up and see if the light comes on. If it doesn't, the problem is in the power to the fans, check fuse, sensor and relay. If the light comes on and the fans don't, check for a proper ground (usually a green or black wire attached to a lug and bolted to the car chassis.
I would suspect the cooling fan is not working properly. One of more of the cooling fans should run continuously when the A/C is on. If not the engine will overheat.
you might want to check for a blown head gasket or a cracked head or block. espically if it loosing water out of the radiator with out leaking on the ground.
No
The cooling fans on a 2002 Grand Am GT might not be working because of a problem with a fuse. There is also a temperature sensor in the engine that tells the fans when to come on. This sensor may be bad.
The fans normally come on when needed. Is the car running hot -- is the temperature gauge reading above normal? If so, there's a problem with the fans or the cooling system. If not, don't worry about it.
I believe that the fan(s) come on automatically with the AC system. Someone else might be able to confirm that. If so, then I would guess that you need to find and replace the temp sensor/switch for the fans.
All but the earliest versions of this car have the cooling fans controlled by the computer through a relay.So the first suspect is the relay. When the fans stay on take out the relay in the power distribution box, most commonly under the hood. If the fans stop swap the relay with another in the box, I usually use the horn relay, usually the same relay.Next possible problem is an electrical problem triggering the relay.Third is the computer itself could be faulty.