hvac controls?

my65coupe · 10-17-2009, 06:21 AM

having a problem with the "heat" knob.
when i turn from hot to cold no problems hot air comes out but if i try to change back to cold hot air still comes out?
if i turn truck of for a minute it is cold again.
hoping someone have had this happen.

leolkfrm · 10-17-2009, 06:52 AM

more info on teh vehicle is needed, type of hvac also helps

crabtruck · 10-18-2009, 01:11 AM

Welcome to the posting side of the forum my65coupe.

Quote:

Originally Posted by my65coupe

having a problem with the "heat" knob.
when i turn from hot to cold no problems hot air comes out
but if i try to change back to cold hot air still comes out?
if i turn truck of for a minute it is cold again.....

Slow down a little when typing and make sure it says what you want.
Also leo is right, too many possibilities to not know what
the yr/make/model and type of AC you have (cables/knobs/digital/auto)

A picture may be helpful if you can do that, tho not a must have.

my65coupe · 10-18-2009, 07:37 AM

sorry,
truck is a 00 sierra slt 1500 with the knobs no digital controls

was thinking about replacing the indash control unit but would be stupid if it is something simple to fix.
not a problem i couldnt' live with(hot-cold) but if i can fix why not.

crabtruck · 10-24-2009, 06:00 PM

Want to be careful about disconnecting the air bag fuse and the bag connectors if going in there.
Get details from somebody who knows if you don't.
An intermitent could easily be caused by excessive tension on the harness
leading to poor connections.
One cheap test may be to set for the bad temp and then see if it changes
when wires are jostled.

10-17-2009, 06:21 AM	#1
my65coupe Junior Member Join Date: Jun 2009 Location: chicago,il. Posts: 5	hvac controls? having a problem with the "heat" knob. when i turn from hot to cold no problems hot air comes out but if i try to change back to cold hot air still comes out? if i turn truck of for a minute it is cold again. hoping someone have had this happen.

10-17-2009, 06:52 AM	#2
leolkfrm Senior Member Join Date: Mar 2008 Location: N.Y. Posts: 4,300	more info on teh vehicle is needed, type of hvac also helps __________________ 4 wheels move the body 2 wheels move the soul B.W.A.I

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10-18-2009, 07:37 AM	#4
my65coupe Junior Member Join Date: Jun 2009 Location: chicago,il. Posts: 5	sorry, truck is a 00 sierra slt 1500 with the knobs no digital controls was thinking about replacing the indash control unit but would be stupid if it is something simple to fix. not a problem i couldnt' live with(hot-cold) but if i can fix why not.

10-24-2009, 06:00 PM	#5
crabtruck Senior Member Join Date: Jul 2007 Location: on your 9 Posts: 3,366	Want to be careful about disconnecting the air bag fuse and the bag connectors if going in there. Get details from somebody who knows if you don't. An intermitent could easily be caused by excessive tension on the harness leading to poor connections. One cheap test may be to set for the bad temp and then see if it changes when wires are jostled.