Aleromod.com - View Single Post - #2 Cooling Fan Runs on High after Ignition is off for a very long time

Pikester · 10-18-2008, 07:39 AM

Thanks for the input. I will check to see if the ground strap to the fuse panel is corroded, thought about that last night. Had the under hood fuse panel out last winter and it was good. The vehicle has seen little mileage since then, but I will not rule that out.

Cliff, I know the fans have 3 mini fuses one is for ground but I will double check the relays. You might be correct on the fans both running. Maybe the #1 fan is shot and the PCM triggers the #2 fan to run? I will need to make some phone calls to some buddies. I have lost my ability to look this stuff up at work. It might be time to purchase an OEM service manual as I have 3 Aleros in the family now.

I have run past this before but cannot remember.

01OldsAleroGT – The PCM (Pewrtrain Control Module) controls your fan operation. The fans are programmed to run when you’re A/C is operating (generally speaking but do not quote me as I did not write the software for this powertrain system platform) or your engine coolant temperature is over a certain threshold. If you sit in traffic, and can hear over the other noises, your fans will turn on without your A/C being on if you engine gets that hot. Especially in Florida in the summer. There are threads on this topic here

Sorry for posting this under the New Members Intro – I was in a frustrated place then and not thinking correctly.

10-18-2008, 07:39 AM	#7
Pikester GX Member Join Date: Apr 2008 Location: Michigan Posts: 3	Thanks for the input. I will check to see if the ground strap to the fuse panel is corroded, thought about that last night. Had the under hood fuse panel out last winter and it was good. The vehicle has seen little mileage since then, but I will not rule that out. Cliff, I know the fans have 3 mini fuses one is for ground but I will double check the relays. You might be correct on the fans both running. Maybe the #1 fan is shot and the PCM triggers the #2 fan to run? I will need to make some phone calls to some buddies. I have lost my ability to look this stuff up at work. It might be time to purchase an OEM service manual as I have 3 Aleros in the family now. I have run past this before but cannot remember. 01OldsAleroGT – The PCM (Pewrtrain Control Module) controls your fan operation. The fans are programmed to run when you’re A/C is operating (generally speaking but do not quote me as I did not write the software for this powertrain system platform) or your engine coolant temperature is over a certain threshold. If you sit in traffic, and can hear over the other noises, your fans will turn on without your A/C being on if you engine gets that hot. Especially in Florida in the summer. There are threads on this topic here Sorry for posting this under the New Members Intro – I was in a frustrated place then and not thinking correctly.