A/C Blowing Hot on Driver's Side

KELLSWO

MEMBER
2003 GMC YUKON
5.3L
V8
4WD
AUTOMATIC
193,000 MILES

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

3 Replies

KEN L

MASTER CERTIFIED MECHANIC
47,512 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

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Monday, October 13th, 2014 AT 9:04 PM

SHARON ALLEN

MEMBER
2 POSTS

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?

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Tuesday, August 25th, 2020 AT 5:28 PM

KASEKENNY

MECHANIC
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?

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Friday, August 28th, 2020 AT 6:19 PM