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there are two fans one must come on with the air con, the other when the engine thermostat opens when the engine is hot, most times not on when driving as air flow keeps the engine cool, If it does not come on when hot , check fuses and the fan temp censer.
the air con fan comes on with the air con switch. the engine cooling fan comes on when the engine temp. censer reaches operation temp. most times the air through the radiator when driving is enough to keep the censer cool and the fan not working if you stop at lights for any length of time it will come on.
First check to see that the cooling system is properly filled.
Next, watch you engine temperature and see that it hits operating temperature. If the thermostat sticks open the engine will never get up to normal temp. On my Aurora, that is exactly midway on the temp gauge.
is it blowing a 40 or 60 amp maxi-fuse located on the passenger side front area of the engine compartment located in the fuse panel? If so i believe 95-96 had the wiring for the fans to close to the exhaust manifold causing the insulation on the wiring to melt which in my case resulted in a dead short off and on blowing the fuse.
yes there is a fuse & a relay,,also it could be c/c high pressure censer,,,the fans,,one runs off temp sender the other runs of your heater controls,,a/c or defrost,,,,,,hope it helped,,,
I would check to see if the cooling fan is coming on. Could be a bad fan switch. When the air is turned on, it turns on the cooling fan regardless of engine temp.
It is a coolant sensor(it is not a fan sensor)The difference is that the coolant sensor tells the ecm(computor)the temp,so it can regulate along with other sensors,the engine performance,including turnnig off,and turnnig on,the cooling fans.It is usally in the intake,and near the water outlet.It has two wires.It will be the only sensor in a water jacket.ts 4052 is the part number at napa auto partsIf I can help.>>[email protected]
first useing a scanner or temp gun check the actual engine temp. if it is hot check for fan opperation, air lock in the cooling system water pump operation I think youll find the prblem to be the fan
Cooling Fan Temp Sensor is the First thing You Check (with what you have described) Cooling Fan Should ALways come On When The A/C is turned On as A/C Adds A Load to Engine, If Temp Sensor is Faulty it Will Not Give GROUND Signal to ECM >For COOLING FAN >RELAY to Give ground and turn ON The Fan.
There ARE 2 temp Sensors that Serve Different Purposes 1 is for Dash READING GAGE & Or TEMP LIGHT the Other is For ECM or Fan Relay (SAME Thing) you Said>""can disconnect the sensor and fan continues to run" < This Leads me to think you Changed the Wrong One. Not Questioning your Skills Just Here to Help.
TEMP SENSOR FOR 3.1L V6 is Located upper RH rear of engine compartment, near exhaust system. Temp SENSOR for 2.3L Engine is Located in LH rear of engine compartment. I Hope this Helps Lead you to a NON-OVERHEATING Pontiac.
Good Luck and Have A Great Evening. rejakwilson
If I can help.>>[email protected]
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