Question about 2003 Chevrolet Silverado 1500

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Temperture control systems

Passanger side will not heat

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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.
Also try disconnecting the battery negative cable a few times for 5 minutes to see if the systems are just out of sync.

Posted on Oct 30, 2012

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SOURCE: 2001 Monta Carlo will not heat only on the

there is a motor to drive the door open and closed on each side - door could be stuck or motor /coupling bad - a scanner should give a code for climate control

Posted on Sep 25, 2009

bschilz
  • 2049 Answers

SOURCE: any advise on driver side heated seat not working

This is usually a problem with the passenger seat heater control module. It is a common failure on your vehicle. The module is part of the seat cushion.

Just for the heck of it though, check to make sure the wiring to the module under the seat is connected and not loose.

Posted on Nov 06, 2009

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