Front A/C vents do not blow cold air?

2015 GMC YUKON

115,000 MILES • 5.3L • V8 • 4WD • AUTOMATIC

BLONG60

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Both front vents blow ambient air when turned to cool, and both sides blow hot when adjusted to hot.

All rear vents are cooling properly.

If I have a leak would the entire system run dry? Or could the leak be isolated to the front system.

Aug 3, 2023 at 8:16 AM

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I have seen the ambient light/sun load sensor or one of the vent temperature sensors go bad and cause this problem to find out which one is bad we need to do a CAN scan, this will tell us which sensor has gone out, you can get a CAN scanner (Controller Area Network) which will work on most cars from Amazon.

here is a video to show you how:

https://youtu.be/u-4syLc-ifQ

Here are the A/C wiring diagrams so you can see how the system works and what parts are involved with the system. Check out the images (below). Please let us know what happens.

Images (Click to enlarge)

Aug 3, 2023 at 3:58 PM

STRAILER

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anything?

May 6, 2024 at 12:04 PM