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AC does not blow the correct direction

Tiny
KEVIN GODWIN
  • MEMBER
  • 2008 GMC SIERRA
  • 80,000 MILES
Crank truck up and everything works perfect. A min or two goes by then in does not blow out any where, but fan is still running
Saturday, December 24th, 2011 AT 2:32 AM

13 Replies

Tiny
KEVIN GODWIN
  • MEMBER
  • 53 POSTS
Also put a new hvac control head in it twice
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Saturday, December 24th, 2011 AT 2:33 AM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the air blend door/actuator
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Saturday, December 24th, 2011 AT 2:50 AM
Tiny
KEVIN GODWIN
  • MEMBER
  • 53 POSTS
It wouldnt be the mode door
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Saturday, December 24th, 2011 AT 2:51 AM
Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
The fan motor is running but is the blower fan turning? Is it slipping on the shaft?
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Sunday, December 25th, 2011 AT 8:24 AM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
Yes, it would be the mode door actuator that you are having a problem with. It's located on the end of the HVAC housing on the driver's side.
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Sunday, December 25th, 2011 AT 12:54 PM
Tiny
KEVIN GODWIN
  • MEMBER
  • 53 POSTS
Replaced mode door worked great for a while then went back to the same thought maybe a bad part tried another and no luck what next?
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Friday, January 6th, 2012 AT 3:20 AM
Tiny
KEVIN GODWIN
  • MEMBER
  • 53 POSTS
Fixed but now it blows cold for 10 min then stops blowing all together. You can turn ac compressor off wait a few min. Then turn it back on and it will start back blowing
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Friday, March 30th, 2012 AT 2:36 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
Can you hear the blower running when this happens?
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Friday, March 30th, 2012 AT 2:41 PM
Tiny
KEVIN GODWIN
  • MEMBER
  • 53 POSTS
Yes
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Friday, March 30th, 2012 AT 3:00 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
Then the evap may be freezing up due to a faulty low pressure cut off switch.
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Friday, March 30th, 2012 AT 3:25 PM
Tiny
KEVIN GODWIN
  • MEMBER
  • 53 POSTS
Kinda what I was thinking just wanted second opinon thanks
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Friday, March 30th, 2012 AT 4:08 PM
Tiny
KEVIN GODWIN
  • MEMBER
  • 53 POSTS
Does this truck have a low side stwich and a high side stwich or is there just a ac cycling stwich?
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Friday, March 30th, 2012 AT 4:14 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
The cycling switch is the one you are concerned with.
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Friday, March 30th, 2012 AT 4:25 PM

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