Question about 1999 Cadillac DeVille

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How do I fix heater on my Cadi deville - 1999 Cadillac DeVille

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Air Temperature Control Blend Door Failure

In all modern cars there is a tiny DC electric motor driven gear drive that moves a plastic door that blends heated and cooled air from the AC and the heater core, this is called (interestedly enough) the air temperature control blend door actuator. The motor that moves this door fails because the door starts sticking from warping, most common complaint is no heat but it can be no AC as well. To replace these parts (blend door and blend door actuator) you must remove the entire dash from the car. Always have this problem confirmed by a dealer or qualified repair shop as it is a very expensive repair.



Posted on Oct 30, 2012

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Posted on Jan 02, 2017

  • 514 Answers

SOURCE: Have a 1998 Cadi deville, won't start with keys

check either fuse or starter relay,

Posted on Oct 28, 2011

  • 1118 Answers

SOURCE: heater cores out

Take both heater hoses off and hook them together with a piece of pipe and a couple of hose clamps.

Posted on Apr 08, 2009

  • 1348 Answers

SOURCE: Will the wheel speed sensors from 1997 cadi

only if the rest of the car is the same

Posted on Aug 18, 2009

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