Question about 1999 Mercury Grand Marquis

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Automatic Temp Control

When I set my automatic temperature control, it will sometimes kick on and off. It still heats and cools.

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I believe that is how automatic temp control works once the desired temperature setting is reached it should shut off then maintain this temperature thus kicking on and off. Or is the problem that its not getting to the temperature you are requesting.

Posted on Aug 13, 2008

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1999 ford expedition , runs good doesn't overheat , but puts out no heat ?


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Why is my AC compressor running when my temperature control is set to heat, fan control set to 2, AC control switch off and air flow control set for floor?


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Hot air blows when system turned to heat, when control is moved to Defraost or combination heat/defrost air temp cools down, what could cause this?


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