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Search Auto Parts Search 98 Chevy Blazer - A/C Temperature Control Unit Sign up here!   Email This Post Auto Repair Home>> Automotive Repair>> Car Troubleshooting sybertiger New User Aug 1, 2007, 7:22 AM Post #1 of 4 (4266 views) 98 Chevy Blazer - A/C Temperature Control Unit Sign In I went to turn on A/C and nothing...no fan at all and button lights for A/C, recycle air or outside air intake. Went thru this (no a/c) for 2.5 days and occasionally one or both of the outside and recycle air lights would be lit, but still no fan, no a/c and no a/c light lit. I took to mechanic for diagnosis and they said this part is bad and also mentioned the blower module might be affected but they couldn't get to it. They mentioned blower module should have an indication of fuse of 2-4 volts and it was registering 13 volts. This morning I start up car and the a/c is working along with a/c light now lit and recycle air light on. Now I'm going a bit crazy as I was just about to get this part replaced. This part (also called a A/C control head) is the "electronic" type vs. the cheaper manual type and is a $450 Chevy part. Now I'm not sure to go ahead and replace this part. Can anyone shed some light on this problem....is this just the Temperature Control Unit going bad and is intermittently working??? What about the blower module being bad....could this be the real culprit and not the Temp control unit. Thanks in advance for your input! Diana Tom Greenleaf Ultimate Carjunky / Moderator Aug 1, 2007, 8:15 AM Post #2 of 4 (4264 views) Re: 98 Chevy Blazer - A/C Temperature Control Unit Sign In I don't know for sure with this but will say that most of that stuff does not heal and with it being intermittent like you mentioned I wouldn't do it right now as I don't think that's a sure diagnosis. I totally don't understand the voltage drop at the fuse and doubt that. Items that need voltage adjustment is about always done after the fuse. Hit me with a PM and I might be able to direct you to an exact individual who would know what the problem is likely to be. Never mind the cost of the part - some of those things are very labor intensive to replace so you don't want a mistake there, T sybertiger New User Aug 1, 2007, 8:20 AM Post #3 of 4 (4262 views) Re: 98 Chevy Blazer - A/C Temperature Control Unit Sign In what's a PM? Tom Greenleaf Ultimate Carjunky / Moderator Aug 1, 2007, 8:52 AM Post #4 of 4 (4260 views) Re: 98 Chevy Blazer - A/C Temperature Control Unit Sign In PM = Private Message. Click on my name near kitty and see lower right corner, T   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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