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#1
11-02-2012, 11:37 PM
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Re: AC blowing hot air when off?
Blend door actuator. Its what regulates the hot/cold air.
#2
11-03-2012, 03:51 PM
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Join Date: Dec 2003
Location: New Braunfels/Canyon Lake, TX
Posts: 1,357
Re: AC blowing hot air when off?
So I did some google on the blend door actuator....my system is running fine when it's on - keeps cold and hot no problem. The hot air only comes out when the system is turned OFF. If the actuator was bad, wouldn't the AC not run normally?
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2003 yellow Lux, 12" Bulletproof lift, 42" Pitbull Rockers, 20" Ultra Predators, Corsa sport exhaust, painted interior
2004 Cadillac Escalade, white diamond, dual tip chrome exhaust, 20" chrome 9-spoke rims, altezzas - TOTALLED!!!! Replaced with a nondescript 2009 Chevy Tahoe
1970 VW Karmann Ghia, black with a flame job and too many mods to list
#3
11-03-2012, 06:22 PM
Hummer Expert
Join Date: Dec 2007
Posts: 705
Re: AC blowing hot air when off?
What are you calling "system"?? The entire hvac or just the ac unit?
#4
11-04-2012, 01:26 AM
Hummer Authority
Join Date: Dec 2003
Location: New Braunfels/Canyon Lake, TX
Posts: 1,357
Re: AC blowing hot air when off?
I guess the AC. Because if it blew hot air when the heat was on, then that wouldn't be a problem then, right?
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2003 yellow Lux, 12" Bulletproof lift, 42" Pitbull Rockers, 20" Ultra Predators, Corsa sport exhaust, painted interior
2004 Cadillac Escalade, white diamond, dual tip chrome exhaust, 20" chrome 9-spoke rims, altezzas - TOTALLED!!!! Replaced with a nondescript 2009 Chevy Tahoe
1970 VW Karmann Ghia, black with a flame job and too many mods to list
#5
11-04-2012, 04:24 AM
Hummer Authority
Join Date: Apr 2003
Location: Las Vegas
Posts: 1,819
Re: AC blowing hot air when off?
Hopefully it's not the Blend door actuator ... I just replaced mine what a PAIN IN THE ARSE!!! It drove me NUTZ and cut my hands up!! It's a 10 on the SUCK Scale!!!
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... Teh black won't get you back
#6
11-04-2012, 05:35 AM
Hummer Authority
Join Date: Sep 2003
Location: Canada
Posts: 1,251
Re: AC blowing hot air when off?
I dont suppose you have your hvac system on auto climate control when this happens do you? If so your inside air temp sensor reading may be causing your problem. It will default to -40c if its not working and try to heat up the cab
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#7
11-05-2012, 12:35 AM
Hummer Authority
Join Date: Dec 2003
Location: New Braunfels/Canyon Lake, TX
Posts: 1,357
Re: AC blowing hot air when off?
It's always on auto - interesting! So how would I test if it's the sensor or the actuator?
__________________
2003 yellow Lux, 12" Bulletproof lift, 42" Pitbull Rockers, 20" Ultra Predators, Corsa sport exhaust, painted interior
2004 Cadillac Escalade, white diamond, dual tip chrome exhaust, 20" chrome 9-spoke rims, altezzas - TOTALLED!!!! Replaced with a nondescript 2009 Chevy Tahoe
1970 VW Karmann Ghia, black with a flame job and too many mods to list
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