Question about 1995 Pontiac Grand Am

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95 grand am radiator fan only runs with AC on

Have changed sensor for the coolant fan, can disconnect the sensor and fan continues to run, can also turn on ac and fan will run just fine.
Coolant fan will not run when temperature is high, car overheats.

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  • Allison Hulbert May 11, 2010

    The fan is not suppose to run till 235 degrees

  • Pol Cervan May 28, 2013

    I have the same problem with my Peugeot 207. fan not working when ac is off. temperature rises when on idling .losing coolant as well.please help

  • Anonymous Mar 13, 2014

    radiator cooling fans come on late

  • Anonymous Mar 18, 2014

    AC condenser fan runs with ignition turned off

  • Anonymous Mar 30, 2014

    My Toyota Sienna overheats when the AC is on and driven for about 45 minutes When I stop I find out the Radiator is empty of coolant


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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

Posted on Feb 04, 2009

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Relay, on engine fuse box if car overheats, check if thermostat i shut

Posted on Feb 04, 2009

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