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Search Auto Parts Search A/C heater control diagnosis Sign up here!   Email This Post Auto Repair Home>> Automotive Repair>> AC Auto Repair Help Forum MoHouze New User Jan 5, 2012, 2:57 PM Post #1 of 3 (2598 views) A/C heater control diagnosis Sign In 1999 GMC Jimmy SLT 4.3L V6 miles 136084 The problem is no heat. But nothing on the A/C heater control works ( rear def, vent control, A/C control). In the summer i could feel cool air as if it was from the A/C but not blowing . A mechanic looked at the blower motor and it ran but stopped . Unsure as of how he tested it. I believe my problem to be the A/C heater and control. Is there a way to know if it's the A/C heater control ? Hammer Time Ultimate Carjunky / Moderator Jan 5, 2012, 4:57 PM Post #2 of 3 (2563 views) Re: A/C heater control diagnosis Sign In You have to do some testing. Start with testing all the fuses using a test light. Test for power and ground arriving at the blower motor. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional. MoHouze New User Jan 5, 2012, 10:00 PM Post #3 of 3 (2551 views) Re: A/C heater control diagnosis Sign In ok, will start testing in the morning thanks !   Email This Post   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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