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Discussion Starter · #1 ·
I have a 2006 1500 Silverado, 5.3L, that sometimes blows hot air when the A/C is on. Moving the temperature slide control does not affect the temperature. How I get it to work is that I shut the engine off and restart it. Then it works fine. I think its a vacuum problem but I cant seem to find a schematic of the vacuum system for the Silverado. If anyone has a copy of the schematic, I would appreciate it. If anyone has a similar situation and knows the fix that would be great too!
 

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2017 Silverado LTZ Z71
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Blend door actuator
 

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Check the High/Low cutout switches. I've heard of something similar where one of the switches would trip randomly while driving and would reset when shutting off the engine and restarting. I think the compressor is locked out once there is a problem to prevent short cycling the compressor when there is a problem. After a shutdown/restart it is reset until it happens again. That was on a 90's Dodge car though, so take it for what it's worth.
Just a possibility, but make sure you look at all the options.
 

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Discussion Starter · #7 ·
Thanks for all the replys
Googled all of the Youtube videos. There's a bunch and after watching a few, I think I know what to do and where all 4 (I didn't realize there are 4 actuators) actuators are located.
Thanks!!
 
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