Blower fan running - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 05-11-2006, 03:57 AM   #1
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Default Blower fan running

What would make the fan for the AC/Heat continue to run even after I turn it off and shut off the engine? Bad relay? When I turn it off it will continue to blow through the defrost. Last night when I got home and turned the car off, the fan kept running. I was finally able to get it to shut off after starting and shutting off the engine a couple of times.
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Old 05-11-2006, 08:24 AM   #2
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did it just start one day doing this? And if you don't touch does it shut off after 10 min after radio shuts off,
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Old 05-11-2006, 08:41 AM   #3
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This just happened about 2 months ago to someone. He had to disconnect his battery every night. I don't recall who it was. Ring a bell to anyone?
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Old 05-11-2006, 08:42 AM   #4
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Not sure what possible causes in the 94 year.

This should not be controlled on the retained power as suggested by MasterBM. The fan should turn off with the key immediately.

92-95 manual owners... Need some help with the circuit.. I think this goes from the ECC to the programmer, then to the fan motor?
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Old 05-11-2006, 09:24 AM   #5
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This happened for the first time last night. The only thing that happened was we had a really hard rain, other than that nothing out of the ordinary. And yes, the fan should cut off as soon as I turn the car off.
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Old 05-11-2006, 09:27 AM   #6
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Really hard rain. hmmmm

Please pull the carpet up by your drivers door a little and see if the floorboard is wet.
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Old 05-11-2006, 09:41 AM   #7
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Ok, just started car, turned on fan, shut car off, fan still running. I was able to unplug the power to the fan for now. Checked floor board and it does not appear to be wet.
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Old 05-11-2006, 09:45 AM   #8
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Ok..good progress.

Now we need someone with the manual to chime in and should be able to nail this down.
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Old 05-11-2006, 09:48 AM   #9
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Ok, gotta go for now. I will check back on this around 01:00 EST.
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Old 05-11-2006, 04:23 PM   #10
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Thanks for your help guys. I got it fixed. Bad power module. Everythings back to status quo.
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