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2004 Chevy Truck very intermitant

Tiny
DON ARNDT
  • MEMBER
  • 2004 CHEVROLET TRUCK
  • V8
  • 4WD
  • AUTOMATIC
  • 80,000 MILES
May be one week apart or two days, but all of a sudden the heater is full heat temp. (Can shut off blower of course) very hot air and slide controls has no effect where ever they are set. Turn off the ignition and back on and it is fine for a few days. After resetting that way the A/C and heater work perfectly for a time.
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Wednesday, August 20th, 2008 AT 7:45 AM

4 Replies

Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
The truck needs to be scanned for any codes relating to any modules, A/C control, body, pcm. If any codes are stored they will point you in the right direction.
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Thursday, August 21st, 2008 AT 4:20 PM
Tiny
DON ARNDT
  • MEMBER
  • 3 POSTS
That is the problem. No codes come up. The only way to get the A/C to put out cold again is to turn off the ignition then back on. After that, all is normal for a period of time.
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Monday, August 25th, 2008 AT 10:38 AM
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
Is this auto temp, or manual A/C?
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Monday, August 25th, 2008 AT 5:32 PM
Tiny
DON ARNDT
  • MEMBER
  • 3 POSTS
It is a "Duel Climate Control System". I don't think that is Auto Temp. I'm not sure. The manual does not say Auto temp.
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Tuesday, August 26th, 2008 AT 9:29 AM

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