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czeslaw1
New User
Aug 27, 2009, 12:14 PM
Post #1 of 2
(1410 views)
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I have a 2002 Mercury Sable with an automatic air conditioning control system. When I turn the airconditioning on , the compressor is working, but only hot air is blowing out of the vent. All piping is very cold, and I am setting a minium low temperature but the air that is being blown is hot air. Any idea on what could be wrong?
(This post was edited by czeslaw1 on Aug 27, 2009, 12:16 PM)
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Hammer Time
Ultimate Carjunky
/ Moderator
Aug 27, 2009, 12:29 PM
Post #2 of 2
(1401 views)
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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.
You can determine if this is the problem by temporarily pinching off one of the heater hoses going into the firewall.
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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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