Erratic A/C

taildragger · 09-21-2009, 09:26 PM

Hello Everyone

I'm new to the forums and have a problem with my 06 Chevy 3500 Duramax. The A/C will be working fine then the mixers must get the wrong signal and it changes from cold air to heated air. Sometimes just the passenger side is affected sometime both.
Usually I turn off the truck and restart and it's back to cold air. I have removed the fuse for the a/c circuit for awhile and reinstalled but that did not help....any ideas?

Taildragger

gmctrucks · 09-21-2009, 10:20 PM

Welcome to the forum and howdy from TEXAS. My bothers HD was doing the same thing so when it happened once he turned up the heat all the way then he put it back to cool and it fixed it. It's a electronic part that's messing up you might call the dealership and see if there is a recall on it or service bulletin.
Good luck! GMC

taildragger · 09-22-2009, 07:13 AM

Thank you GMC...we'll give that idea a try.

leolkfrm · 09-22-2009, 06:12 PM

don't you have 5 yrs 100,000 miles?

taildragger · 09-25-2009, 09:00 PM

I was pulling a wagon load of soybeans today and was running the a/c and the passenger side started putting out hot air so I turned the temp control all the way up as suggested and then back down and sure enough it changed to cool air.
So I guees I'll call the dealer since it is covered by warranty.

Thanks for all the help
taildragger

gmctrucks · 09-25-2009, 11:15 PM

TD I could use a rep point. Just kidding im glad my info helped you out now when you have it fixed get the name of the part because there has been some other members having that same problem even try to find out where the part is located say you might even ask them how much the part cost.
Thanks! GMC
PS-Since your a new member here what us veterans like here is when a member lets us know what fixed the problem.

09-21-2009, 09:26 PM	#1
taildragger Junior Member Join Date: Sep 2009 Posts: 3	Erratic A/C Hello Everyone I'm new to the forums and have a problem with my 06 Chevy 3500 Duramax. The A/C will be working fine then the mixers must get the wrong signal and it changes from cold air to heated air. Sometimes just the passenger side is affected sometime both. Usually I turn off the truck and restart and it's back to cold air. I have removed the fuse for the a/c circuit for awhile and reinstalled but that did not help....any ideas? Taildragger

09-22-2009, 06:12 PM	#4
leolkfrm Senior Member Join Date: Mar 2008 Location: N.Y. Posts: 4,300	don't you have 5 yrs 100,000 miles? __________________ 4 wheels move the body 2 wheels move the soul B.W.A.I

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09-21-2009, 10:20 PM	#2
gmctrucks Senior Member Join Date: Nov 2006 Location: Houston,Texas Posts: 4,037	Welcome to the forum and howdy from TEXAS. My bothers HD was doing the same thing so when it happened once he turned up the heat all the way then he put it back to cool and it fixed it. It's a electronic part that's messing up you might call the dealership and see if there is a recall on it or service bulletin. Good luck! GMC

09-22-2009, 07:13 AM	#3
taildragger Junior Member Join Date: Sep 2009 Posts: 3	Thank you GMC...we'll give that idea a try.

09-25-2009, 09:00 PM	#5
taildragger Junior Member Join Date: Sep 2009 Posts: 3	I was pulling a wagon load of soybeans today and was running the a/c and the passenger side started putting out hot air so I turned the temp control all the way up as suggested and then back down and sure enough it changed to cool air. So I guees I'll call the dealer since it is covered by warranty. Thanks for all the help taildragger

09-25-2009, 11:15 PM	#6
gmctrucks Senior Member Join Date: Nov 2006 Location: Houston,Texas Posts: 4,037	TD I could use a rep point. Just kidding im glad my info helped you out now when you have it fixed get the name of the part because there has been some other members having that same problem even try to find out where the part is located say you might even ask them how much the part cost. Thanks! GMC PS-Since your a new member here what us veterans like here is when a member lets us know what fixed the problem.