A/C and cooling fans quit simultaneously... - 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 06-22-2004, 04:21 PM   #1
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Default A/C and cooling fans quit simultaneously...

My ECC is throwing a code 48, which did this when the blower wasn't working. I wired the blower motor back up, and it worked fine for a while. Now it'* throwing the code again, working only on ECON, and the cooling fans do not run, either on low or hi. Engine temps almost redlined, and they still didn't kick on. I checked the relays and fuses, and they seem to be fine. Is there anything else I should check?
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Old 06-22-2004, 04:43 PM   #2
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I think I might try disconnecting the battery for a half-hour......
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Old 06-22-2004, 05:53 PM   #3
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Let me clarify......no AC in auto, circulation fan only works on Economy, and neither cooling fan works in any mode?
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Old 06-22-2004, 06:01 PM   #4
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Quote:
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Let me clarify......no AC in auto, circulation fan only works on Economy, and neither cooling fan works in any mode?
It won't even go to Auto. Rest is correct.
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Old 06-22-2004, 06:48 PM   #5
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That'* a sign of an ECC fault, and unfortunately, 93 was the last year for on-board diagnostics.

Is your display flashing?
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Old 06-22-2004, 06:55 PM   #6
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Default Re: A/C and cooling fans quit simultaneously...

Ummm...Will?? Are you still talking to me? I have a '93, man!!!

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Originally Posted by TrueWildMan
My ECC is throwing a code 48, which did this when the blower wasn't working. I wired the blower motor back up, and it worked fine for a while. Now it'* throwing the code again, working only on ECON, and the cooling fans do not run, either on low or hi. Engine temps almost redlined, and they still didn't kick on. I checked the relays and fuses, and they seem to be fine. Is there anything else I should check?
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Old 06-22-2004, 06:57 PM   #7
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****. Brainfart. Thought you had a 94. Too damn many cars around here

Techinfo, bud. Especially if your display is flashing. Sorry about that....I missed part of your post in the rush to answer a few in some slack time.

Clear the code. Mine does that once a year. You might just be fine.
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Old 06-22-2004, 07:00 PM   #8
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Quote:
Originally Posted by willwren
***^. Brainfart. Thought you had a 94. Too damn many cars around here

Techinfo, bud. Especially if your display is flashing. Sorry about that....I missed part of your post in the rush to answer a few in some slack time.

Clear the code. Mine does that once a year. You might just be fine.
K. I'll try that. I already knew that 48 was long term freon loss, but the freon'* fine. And it seems to throw that code when something electrical happens...I'll let ya know...
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Old 06-22-2004, 07:02 PM   #9
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P.*. - I clear the code by disconnecting the battery, right?
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Old 06-22-2004, 07:03 PM   #10
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No, that will have no effect. The ECC has a keepalive memory feature. Use the procedure in Techinfo VERY carefully to clear the code.
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