My engine fan has started running for 5 or 10 minutes after I shut off the engine. Has anyone else had this problem? I have 77,700 miles on the HHR and this problem just recently started.

 

Is this with the key turned all the way off?

 

Mine shuts off with the key.....

 

How hot is the car? If its over 216F out it will run until it drops to 206 or so

 

The key was off and it was over 206. I haven't watched the temp to see if it shuts off at 206.

 

Your fan will run with the key off under certain conditions. The information below was posted in another thread, I think by ChevyMgr, and has all the fan information for you.


Parameters for cooling fan on/off

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The engine cooling fan system consists of one cooling fan and one relay. The relay is powered by the battery positive voltage circuit and controlled by a switched ground from the engine control module (ECM).

During operation, the ECM supplies the ground path for the cooling fan relay through the cooling fan relay control circuit. This energizes the cooling fan relay coil, closes the relay contacts, and supplies battery positive voltage from the cooling fan fuse through the cooling fan motor supply voltage circuit to the cooling fan. The cooling fan motor is grounded through its own ground circuit.

The ECM commands the fan on under the following conditions:

• Engine coolant temperature exceeds approximately 106°C (223°F).

• A/C refrigerant pressure exceeds 1302 kPa (189 psi).

• A/C is requested and vehicle speed is below 100 km/h (62 mph) with A/C pressure above 1413 kPa (205 psi).

• AF23-5 Transmission fluid temperature exceeds 130°C (266°F).

• VT25-E Transmission fluid temperature exceeds 140°C (284°F).

• When the engine coolant temperature exceeds 125°C (257°F) at key off, the fan will run for up to 108 seconds.

The ECM commands the fan off under the following conditions:

• Engine coolant temperature drops below approximately 125°C (257°F).

• Throttle position is greater than 95 percent.

• Vehicle speed exceeds 113 km/h (70 mph)

 

It sounds like normal operation, just a case of running hotter than usual in this BBQ style heat of late.

 

Yeah this is normal.... especially for June

 

I'm betting your fan control module is going south. Unless it's running 257* or hotter (which is very bad BTW), it should shut off with the key.

 

I live in TX and have driven my car in 100 degree heat several times this year, and years previous, and the fan has never ran after shutting off the car.