Question about 2001 GMC Yukon Denali

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Hi my 2001 yukon denali just blows hot air only on my auto climate control front and rear .i had someone put a new rug in it and my h/ core housing [under the passanger side [ has something hanging is that a resister ?plus if a RESISTER IS GONE how come all the dials work on both panels[front and rear control pnls ]

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  • 18 Answers

The resistor pack is to help control fan speed. Either your temp control door is stuck/unplugged which doesn't seem likely with rear blowing hot too. Could be temp sensor reading incorrectly, even then commanding full cold should do something. I would start with the person you just paid to work on it or you'll be paying someone to diagnose it.

Posted on Dec 12, 2017

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Posted on Jan 02, 2017

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Anonymous

  • 1 Answer

SOURCE: climate control 04 yukon denali

Removing the fuse for a few minutes and turning the controls on both driver side and passenger side to the highest setting and then turning them down slowly until the system started cooling has worked for me. Thanks for the suggestions---saved me $2500.00 on a useless dealer estimate to fix problem. These dealers are dangerous---they were the ones that caused my problem when they unhooked the battery while replacing my ignition switch.

This is a good forum.

Posted on Aug 12, 2008

Anonymous

SOURCE: I have a 2004 GMC

Remove the Positive Battery Terminal, leave the Negative Terminal connected.  Wait 30 minutes.  Attach the Positive Terminal.  Verify temperature settings is around 70 degrees.  This procedure has been known to resolve computer settings.

Posted on Aug 27, 2008

6bta

  • 400 Answers

SOURCE: Changed batteries and climate control not working properly

The actuator has gone bad. They can be programed, and reset, but usaly they are bad, and that will only patch the problem for a while.

Posted on Jun 19, 2009

Philip Armitage

  • 437 Answers

SOURCE: 2004 Yukon. driver side air conditioner not working

you need to change drivers side temp door actuator then disconnect battery for 5 seconds and reconnect after changing the part, turn key on for 60 seconds with touching heater control to allow actuator to program and then it will work.

Posted on Sep 19, 2009

Anonymous

  • 1 Answer

SOURCE: Air conditioner blows hot air after 30 seconds on

I have had this problem. I am not a mechanic...so to correct the issue temporarily, I simply turn off the car and restart. This has worked everytime for me. In extreme cases, I think you can also remove the AC fuse and start the car, which will also reset the computer. I also think that by taking the climate control off the "AUTO" setting has worked in the past.

Posted on Oct 27, 2009

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1 Answer

Rear heating problem


Hi Jeff. I had the same problem, along with others on my 03 Denali. Along with not blowing hot air from the rear heating system, I had hot air blowing out of the passenger side and cold air out of the drivers' side vents. My battery would go low and had the same smell. I took my Denali in to the dealer and they found it was a bad Fan Control Module. They replace it and everything worked well after. It cost me $293 for parts and labor. Hope this helps.

Nov 22, 2011 | 2003 GMC Yukon Denali

1 Answer

Front a/c blows cold rear a/c blows hot without changing any settings


sounds like blend door actuater cant rule out tho could be vacuum lines back of climate control

Jul 20, 2011 | 2005 GMC Yukon Denali

1 Answer

My 2003 Denali blows cold air in the front but the rear only gets room temp air. It doesnt get cold or hot just regular outside air . Please help. Is there a sensor or relay that needs to be replaced?


There is a blend door that blends the hot air from the heater core and the cold air from the A/C evaporator to make the air dry and just the perfect temperature. I am going to bet its the blend door. the Rear trim will need to be taken off and then you can see what is going on. I don't have any pic of the box but its not that complicated.

Jun 07, 2011 | 2003 GMC Yukon Denali

1 Answer

Have a 2005 yukon xl with climate control a/c blows warm air


Does the front blow cold ? Diagnosing rear problems
Taking to a qualified repair shop an having it diagnosed would be your best bet >

Dec 13, 2017 | 2005 GMC Yukon Xl Denali

1 Answer

Air Conditioner Problem


the most common problem here is a defective air temperature control blend door actuator, this is what moves the door that controls air flow across the heater core or the ac evaporator core, to replace this requires u remove the dash assembly.

Aug 13, 2009 | 2005 GMC Yukon Xl Denali

1 Answer

Changed batteries and climate control not working properly


The actuator has gone bad. They can be programed, and reset, but usaly they are bad, and that will only patch the problem for a while.

Jun 18, 2009 | 2005 GMC Yukon Denali

1 Answer

2001 Acura TL Climate Control Blowing only Cold Air.


Ok it may be that the heater core bypass valve isnt opening. All that valve dose is when you turn the climate control to heat it opens a valve that allows hot coolant from the engine to flow through the heater core. What I would do is check that. It will be on the left side (passange) of your engine bay.You will see two black coolant hoses next to eachother and one will have a black box with a wire that runs to it. Have someone move the climate control from hot to cold to hot back to cold. If you dont see the wire move then you can move it yourself to open the valve.

Let me know if the valve opens or not using the climate control.

Dec 15, 2008 | 2001 Acura 3.2TL

1 Answer

Front Climate Control Blower malfunctioning


Does your vehicle have manual or automatic climate control ? The blower motor control processor may be the problem .
Chevy GMC Blower Fan Stuck On

May 11, 2017 | 2005 GMC Yukon Denali

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