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automatic temperature control for a/c and heat not working
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marker12
New User
Aug 8, 2013, 2:42 PM
Post #1 of 2
(1417 views)
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automatic temperature control for a/c and heat not working
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I have a 1999 Blazer Lt with automatic temperature control. It is a 4x4, 4.3V6 with 107k miles. The temperature control doesn't change the temperature of the a/c when turned up or down. It also doesn't kick in the heat in the winter months. What could be the problem?
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Hammer Time
Ultimate Carjunky
/ Moderator
Aug 8, 2013, 2:50 PM
Post #2 of 2
(1410 views)
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Re: automatic temperature control for a/c and heat not working
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The heat in that vehicle is controlled by a blend door that regulates heated air flow. it is operated by an electric motor/actuator. The problem can be that the actuator is stripped or inoperative or the door itself could be damaged. This is what needs to be determined by examining the actuator and see if it is responding to heat change commands or not.
It's number 1 in the picture and located behind the glove box.
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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.
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