A/C Blowing Hot on Driver's Side

2003 GMC YUKON
193,000 MILES • 5.3L • V8 • 4WD • AUTOMATIC
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KELLSWO
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  • 1 POST
Hello - having a intermittent problem when driving with my a/c blowing hot on the driver's side. All other vents blow cold. Changing the temp control switch does not make it cold again. This can be corrected if I turn off the engine and back on again. Any idea what the problem may be? Thank you!!

- Ken
Oct 13, 2014 at 12:39 PM
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STRAILER
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 54,178 POSTS
Hi Ken,

It is a common problem with these vehicles that the blend door actuator has gone out, so the temperature door is not moving into position.

Here is the instructions and diagram of what it takes to change it
Image (Click to enlarge)
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Oct 13, 2014 at 9:04 PM
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SHARON ALLEN
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I've changed all the blender things still blowing crazy on one side and (now when I turn on the A/C) the whole dash goes out. cool on drivers, cold on passenger and back. what's going on?
Aug 25, 2020 at 5:28 PM
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KASEKENNY
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 18,907 POSTS
Can we back up and find out how many actuators you changed and then a little detail about your vehicle. Is this a dual zone temp vehicle meaning can you adjust each side temp separately from each other?

Lastly, can you get a video of what you mean by the whole dash goes out? Does this mean all the electronics are not responding or shut off?
Aug 28, 2020 at 6:19 PM