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Search Auto Parts Search 1993 C1500 Climate Control Problems Sign up here!   Email This Post Auto Repair Home>> Automotive Repair>> AC Auto Repair Help Forum cowbell New User Nov 27, 2007, 6:25 PM Post #1 of 4 (2887 views) 1993 C1500 Climate Control Problems Sign In Hello, I have a 1993 Chevy C1500 pickup. The problem is with the climate control. After the truck has been running for more than a few minutes the air stops coming out of the vents. Regardless of the setting on the dashboard controls, set to hot or cold, set to dash, floor or defrost… no air comes out of the dash vents, defrost or floor vent. You can hear the blower fan running full speed… but no air comes out anywhere. Once the truck has been off for awhile everything works again for a short time. I replaced the climate control dashboard unit, and nothing changed. Any ideas? Tom Greenleaf Ultimate Carjunky / Moderator Nov 28, 2007, 5:05 AM Post #2 of 4 (2879 views) Re: 1993 C1500 Climate Control Problems Sign In A maybe for this: Look for a vacuum ball (plastic) underhood which is there to store vacuum for various controls and when there is a break there or any vacuum lines most systems default to defrost but perhaps it could stop the whole show like you are experiencing, T cowbell New User Dec 3, 2007, 6:17 PM Post #3 of 4 (2863 views) Re: 1993 C1500 Climate Control Problems Sign In There are no vacuum lines involved with this system. It is entirely electrical. I just spent a couple of hour under the dash, and as luck would have it, I could not duplicate the problem. I have noticed that when this problem is occurring there is a VERY small amount of air coming out of the selected vent. So I believe the problem may involve the hot/cold or fresh/recirculate air baffles. cowbell New User Dec 6, 2007, 7:08 PM Post #4 of 4 (2851 views) Re: 1993 C1500 Climate Control Problems Sign In To further confuse this issue… Over the last several days I have found that if I switch every few minutes between the Defrost button, and the Re-circulate button, (which by default has the air coming from the dashboard vents)… The system will continue to operate as it should. However, if I forget and leave the system on defrost, all air coming out of the system stops... Although the fan motor keeps running at full speed.   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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