Question about 2003 GMC Yukon XL
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Posted on Jan 02, 2017
SOURCE: AC/Heater control problem
In the dash there is a part called the blend door and blend door motor. This allows you to have warm air, and not just cold AC or hot heated air. This motor goes out and whatever position it "dies" in is what kind of air you get. The part is relatitively cheap but the labor cost is huge, because the dash needs to be removed for access.
Posted on May 05, 2009
SOURCE: A/C blowing hot air. Compressor
Could be the expansion valve. That's what allows the temperature to actually drop in the system - the contents of the AC system are under pressure, and are at a certain temperature. When the freon goes through the expansion valve, the pressure drops suddenly and dramatically, which "flash chills" the freon, allowing the air to blow cold. If it fails, you may get lukewarm air from the AC despite everything else working. Also though, check to see whether the AC evaporator fan (underhood) is working - on some cars, if it doesn't turn on, the compressor won't be run enough to cool the air.
Posted on Jul 29, 2008
SOURCE: 99 Suburban A/C Not working
The A/C pressue switch may be bad as well. Also the mode switch on the control head inside the vehicle. There are many other exsisting problems pertaining to a/c. I suggest a manual from Auto Zone for many faults can be noted especially wiring can be at fault
Posted on May 23, 2009
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