AC seems cold only at idle?
Thread Starter
Le Mans Master
Joined: Aug 2005
Posts: 7,392
Likes: 218
From: Merritt Island, FL
AC seems cold only at idle?
THis is strange... At idle, the AC is ice cold. At higher rpm, such as when on the highway, it's lukewarm at best. I've always dealt with systems that got hot at idle, and cool off at higher rpm, due to low refrigerant, or a fan not running properly. Never encountered this scenario.
Any ideas?
Thanks
Andrew
'01 Triple Black Z51 'vert (Possibly for sale/trade?)
Any ideas?
Thanks
Andrew
'01 Triple Black Z51 'vert (Possibly for sale/trade?)
Safety Car
Joined: Jun 2004
Posts: 3,561
Likes: 739
From: panama city beach florida USA
St. Jude Donor '09
check basic stuff condensor clean belt slipping have some one hold rpms at 1500 ia ac cycling high and low side readings? if it needs suva dont put the whole can in . c5s are sensitive to over charge
Thread Starter
Le Mans Master
Joined: Aug 2005
Posts: 7,392
Likes: 218
From: Merritt Island, FL
What tends to go bad in the event of an overcharge, out of curiosity? I've been very careful about not adding any refrigerant if the low-side gauge is in the normal range, but then again, it's a cheapo parts-store gauge.
THanks,
Andrew
THanks,
Andrew
Pro
Joined: Feb 2000
Posts: 510
Likes: 0
Had this happen to me in another GM car.........I found a vacuum leak in a small hose that controlled the air-heat-defrost box ,,,,max vacuum at idle ....everything where it should be.,,,,,as I moved and sped up lost vac,,,,and control box would shut off air......I found mine under the hood simply by feeling all of the small hoses that I thought were vac related..............good luck
Safety Car
Joined: Jun 2004
Posts: 3,561
Likes: 739
From: panama city beach florida USA
St. Jude Donor '09
if you really overcharge you can lock up comp break belt . not too much over and you get reduced cooling. run it up to 1000 1500 rpms and look at low side. if 20 or so give it a small shot 1/4 can 1/2 can
Pro
Joined: Oct 2004
Posts: 538
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From: Edmond Ok
Try with open hood, turning A/C on full blast, have some one rev engine up slowly and see if compressor kicks off. If it is kicking off it it could be due to low suction pressue, or a loss of freon. You could go by a cheap suction gauge from auto parts store and see what pressure you are having on suction side. I bought one for about $20 at autozone.
Good luck and right now is not a time not to have A/C.
Good luck and right now is not a time not to have A/C.
