98 GMC AC Compressor Won't Shut Off

ndw24 · 06-22-2009, 02:43 PM

I have a 1998 GMC 1500 5.7L 4X4, I noticed that i was always getting cold air out the floor when I would shut the air controls off. I checked under the hood and noticed that the clutches on the AC Compressor are always engaged.

So for now I unplugged the compressor for now but would like to figure out this problem.

I replaced the AC relay and did not get a change.

Does anyone have any suggestions on what to try next??
Thanks.

leolkfrm · 06-22-2009, 04:38 PM

Is the temp flapper contoller working correctly?

ndw24 · 06-22-2009, 07:15 PM

The vent flapper doors? Because i have been having trouble with the air flow, after running for so long the air flow out of all vents quits. but the blower motor is still working.

Is this what you mean or is it another issue??

mudseeker · 06-22-2009, 07:55 PM

system could be overcharged causing the compressor to run constantly.

leolkfrm · 06-22-2009, 08:04 PM

yes there are controller motors for them

ndw24 · 06-22-2009, 08:18 PM

What would cause the system to overcharge??

Would the flapper doors problem be related to the compressor problem??

leolkfrm · 06-23-2009, 04:23 AM

The system inside, is calling for cold, therefore the comrpressor is running....fix the inside problems and the compressor should run as needed

ndw24 · 06-23-2009, 06:20 AM

Thanks so much, i'll give it a shot.

06-22-2009, 02:43 PM	#1
ndw24 Junior Member Join Date: Jun 2009 Posts: 4	98 GMC AC Compressor Won't Shut Off I have a 1998 GMC 1500 5.7L 4X4, I noticed that i was always getting cold air out the floor when I would shut the air controls off. I checked under the hood and noticed that the clutches on the AC Compressor are always engaged. So for now I unplugged the compressor for now but would like to figure out this problem. I replaced the AC relay and did not get a change. Does anyone have any suggestions on what to try next?? Thanks.

06-22-2009, 04:38 PM	#2
leolkfrm Senior Member Join Date: Mar 2008 Location: N.Y. Posts: 4,300	Is the temp flapper contoller working correctly? __________________ 4 wheels move the body 2 wheels move the soul B.W.A.I

06-22-2009, 07:55 PM	#4
mudseeker Senior Moderator Join Date: Feb 2006 Location: michigan Posts: 6,373	system could be overcharged causing the compressor to run constantly. __________________ i'd rather be hunting

06-22-2009, 08:04 PM	#5
leolkfrm Senior Member Join Date: Mar 2008 Location: N.Y. Posts: 4,300	yes there are controller motors for them __________________ 4 wheels move the body 2 wheels move the soul B.W.A.I

06-23-2009, 04:23 AM	#7
leolkfrm Senior Member Join Date: Mar 2008 Location: N.Y. Posts: 4,300	The system inside, is calling for cold, therefore the comrpressor is running....fix the inside problems and the compressor should run as needed __________________ 4 wheels move the body 2 wheels move the soul B.W.A.I

06-22-2009, 07:15 PM	#3
ndw24 Junior Member Join Date: Jun 2009 Posts: 4	The vent flapper doors? Because i have been having trouble with the air flow, after running for so long the air flow out of all vents quits. but the blower motor is still working. Is this what you mean or is it another issue??

06-22-2009, 08:18 PM	#6
ndw24 Junior Member Join Date: Jun 2009 Posts: 4	What would cause the system to overcharge?? Would the flapper doors problem be related to the compressor problem??

06-23-2009, 06:20 AM	#8
ndw24 Junior Member Join Date: Jun 2009 Posts: 4	Thanks so much, i'll give it a shot.

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