Auto climate control malfunctioning - 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 07-14-2006, 03:04 PM   #1
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Default Auto climate control malfunctioning



I hoped in the bonnie to take her down to the tranny shop for her inspection. Well, going down the road, the CC is working really hard to try to cool down the car. I look over and it'* on "ECON" aka, vent. So, I push the "AUTO" button for the AC to engage. I press the button and nothing happens, it'* still in "ECON" mode. So, after pressing it 1/2 a dozen times I turn the CC off. Go to turn it back on with the "AUTO" button, it comes back on, but still as "ECON".

Idea'*?

thanks,
john
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Old 07-14-2006, 03:13 PM   #2
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Remind me..what'* the difference between Econ and Auto?
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Old 07-14-2006, 03:17 PM   #3
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Quote:
Originally Posted by BillBoost37
Remind me..what'* the difference between Econ and Auto?
"ECON" is like a vent mode. the A/C is not engaged.
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Old 07-14-2006, 03:20 PM   #4
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Ok, guessing a bit here, possibly the AC freon level is low. Therefore it will not engage the compressor. Defaulting to Econ.

Please try pulling codes. I think you are able to do so on your year.
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Old 07-14-2006, 03:22 PM   #5
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Quote:
Originally Posted by BillBoost37
Ok, guessing a bit here, possibly the AC freon level is low. Therefore it will not engage the compressor. Defaulting to Econ.

Please try pulling codes. I think you are able to do so on your year.
I'll go do that right now
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Old 07-14-2006, 03:25 PM   #6
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Holler when you are back
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Old 07-14-2006, 03:31 PM   #7
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HOLLER!!!

"HISTORY CODE 66
AC COMPRESSOR SENSOR SIGNAL
VOLTAGE IS TOO LOW"

Then the damn temp. number started flashing

Came inside the house to grab a peice of paper and pen to write with, come back out, "AUTO" is engaging but there isn't cold air coming out of the vents

I checked my volts, running between 12.8-13.2

My car need a frion boost?
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Old 07-14-2006, 03:48 PM   #8
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I'm not 100% what that means.. I am more used to the new fangled codes. Got an FSM handy?
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Old 07-14-2006, 03:54 PM   #9
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Maybe they smashed a wire or dinged a connector on the compressor while fussin' over your tranny?
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Old 07-14-2006, 04:02 PM   #10
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Heyyyyyyyyyyyyyyyyyyy I like that thought process Bob...maybe they didn't reconnect it!
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