99 gmc air conditioning
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Forum Name: Shops, Barns, Varmints, and Trucks
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URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=152835
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Topic: 99 gmc air conditioning
Posted By: Tracy Martin TN
Subject: 99 gmc air conditioning
Date Posted: 08 Aug 2018 at 8:38am
My truck has me baffled. Driving this morning air conditioning was fine. The closer I got to work I noticed it was not blowing cold air. Popped the hood and condenser stuff on firewall and lines were solid ice. What would cause this? Been working fine until this morning.Thanks Tracy
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No greater gift than healthy grandkids!
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Replies:
Posted By: Dave H
Date Posted: 08 Aug 2018 at 8:45am
Sounds typical of developing az leak and low refrigerant.
However I would check the charge.
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Posted By: Stan IL&TN
Date Posted: 08 Aug 2018 at 9:45am
As Dave said you might have a leak as it appears to be low on refrigerant. I have to boost mine every couple of years as it as very slow leak.
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1957 WD45 dad's first AC
1968 one-seventy
1956 F40 Ferguson
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Posted By: shameless dude
Date Posted: 08 Aug 2018 at 11:39am
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my '98 used to do that, I added coolant to the radiator tank that was low and it solved it!
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Posted By: Brian Jasper co. Ia
Date Posted: 09 Aug 2018 at 10:42pm
Cycle switch is stuck closed running the compressor too long. This causes the evaporator to ice up. Low refrigerant levels just don't get cold on a mobile system. It's a simple unscrew and replace. There is a Schrader valve under the switch so recovering the system is not necessary.
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"Any man who thinks he can be happy and prosperous by letting the government take care of him better take a closer look at the American Indian." Henry Ford
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Posted By: Dave H
Date Posted: 10 Aug 2018 at 8:49pm
good thought Brian, i have never seen an automotive system ice up like that due to low charge.
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