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2003 GMC Envoy Sign up here! Search this forum this category all forums for All words Any words Whole Phrase (search options) Auto Repair Home>> Automotive Repair>> AC Auto Repair Help Forum Guest Anonymous Poster cmoody@wilbertinc.com Aug 1, 2006, 2:14 PM Post #1 of 3 (4293 views) 2003 GMC Envoy Sign In 2003 GMC Envoy - Air condition stop cooling every two weeks or so. When working it is very cool air, but once in a while it just goes hot. Compress and other mechanical parts seem to be working fine until it goes on the blink for an hour or two. Any ideas on what to check? From my research this seems to be a common problem but I can't find what the fix is. Tom Greenleaf Ultimate Carjunky / Moderator Aug 1, 2006, 3:09 PM Post #2 of 3 (4286 views) Re: 2003 GMC Envoy Sign In Moved the post but you should find it. The key to A/C diagnostics is the pressures which will require a set of gauges also called a manifold set. What I read in your post sounds like a frozen/iced up evaportor almost always caused by low refrigerant and can even reduce air flow. Look for frosted hoses and anythings near where A/C hoses go into the distribution box or firewall. Others may disagree but to me that problem is NOT normal. ....(any warranty on this veh?) It's a big buck biz and sometimes it's a five cent O ring that caused a leak but the equipment and know how to find it is expensive and then the repair if that's it, T (This post was edited by Tom Greenleaf on Aug 1, 2006, 7:56 PM) way2old Veteran / Moderator Aug 1, 2006, 3:20 PM Post #3 of 3 (4285 views) Re: 2003 GMC Envoy Sign In Also maybe a bad low pressure switch?? Being way2old is why I need help from younger minds   Automotive Repair     Auto Body Repair and Refinishing     Heating or AC Issues     Electrical and Wiring     Brake Systems     Car Stereo Repair Advice     General Discussions     Car Making Funny Noises     Engine Fault Codes     Engine Troubles     Exhaust Systems     Steering and Suspension     Transmission Troubles     Tricks of the Trade Automotive World     General Discussions     Antique Car Talk     Car Shows and Events     The Bargin Bin     Motor Vehicle Inspection     Car Care Tips     Traffic Tickets     Gasoline, Motor Oils, Concept Cars and Engines     Auto Insurance, Financing, Leases, Warranties Truck Repair     General Discussions     Truck Engine Repair     Truck Suspension Repair Motorcycle Repair     General Discussions     Motorcycle Engine Repair CarJunky     Open Posting     Board FAQ's     New Board Suggestions

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