05 Yukon Denali heater only blows cold...plz help

Garyjw2 · Jun 7, 2013

Hello thanks for taking a sec to look at my thread. I recently bought a 05 Yukon Denali and I noticed that when I turn on the heater it only blows cold air..then I noticed that on the passenger side blows nice and hot.. So the only place I get hot air is the passenger side.. I felt the two heater lines going into firewall and they are hot.. Trying to fix this myself what do I need to do.. Thanks a lot.

Gary

chauncey0337 · Jun 7, 2013

Sounds like a blend door actuator problem. You must have the dual climate controls so there might be a temp actuator for each side. Located under the dash somewhere. Sorry, I'm not too familiar with the dual climate control. When you change the drivers side temp, do you hear a clicking noise behind the dash?

Garyjw2 · Jun 7, 2013

Dual climate control

chauncey0337 said:
Sounds like a blend door actuator problem. You must have the dual climate controls so there might be a temp actuator for each side. Located under the dash somewhere. Sorry, I'm not too familiar with the dual climate control. When you change the drivers side temp, do you hear a clicking noise behind the dash?

Thanks a lot for taking the time man to help me out..so ya actually I do hear a little ticking sound. Kinda like a servo is stuck or slipping..is it hard to get to and would this be the only problem you think..

chauncey0337 · Jun 7, 2013

That ticking is probably a stripped gear in the actuator. That's why it's not changing temps. If it's an actuator below the dash, not too difficult to get to. If it's one behind the dash, might be a little more difficult. Locate where that noise is coming from and you have found the bad actuator. Mine is single climate control so it has, I think, 3 actuators. I'm pretty sure dual climate control has more and I'm not sure which one in your truck is bad. Hopefully someone with more knowledge will chime in. Check this out, it might help you-

http://tahoeyukonforum.com/forum/showthread.php?t=15787

Garyjw2 · Jun 10, 2013

Great advice

chauncey0337 said:
That ticking is probably a stripped gear in the actuator. That's why it's not changing temps. If it's an actuator below the dash, not too difficult to get to. If it's one behind the dash, might be a little more difficult. Locate where that noise is coming from and you have found the bad actuator. Mine is single climate control so it has, I think, 3 actuators. I'm pretty sure dual climate control has more and I'm not sure which one in your truck is bad. Hopefully someone with more knowledge will chime in. Check this out, it might help you-

http://tahoeyukonforum.com/forum/showthread.php?t=15787

Hey sry for taking awhile to get back..that tread was a really good one..think that is my problem..now just to figure out how to take under dash apart on the 05 Yukon Denali and how to get it back together..think I am going to call gm on Monday and see what the part number is and go from there..thanks again..

nkosmo · Sep 30, 2013

Did you get this fixed??? I have the exact same problem w/ driver side heat blowing cold air..... and am trying to fix it.

ilaneDnokuY_05 · Oct 14, 2013

I recently just fixed this. It's definitely the blend door actuator. It's located above your left foot passenger side. It's a little tricky to take a part but definitely doable. Make sure you take it off before you buy a new one so you can match the part number. Mine was $150 at autozone for an 05 Denali. Little pricey but you don't have much of a choice for the fix.

Here's the write up I followed.

http://tahoeyukonforum.com/forum/showthread.php?t=15787

Hope this helps. Let me know if you have questions.

Garyjw2 · Feb 7, 2014

Hey sry been very busy with getting moved and settled in. Thas great that you got yours fixed . I was going to fix it peer your advice when it started working one day. I was happy, but noticed that the back was still blowing cold.. you think if I do this out will help the back out right?. Thanks

05 Yukon Denali heater only blows cold...plz help

Garyjw2

TYF Newbie

chauncey0337

Full Access Member

Garyjw2

TYF Newbie

chauncey0337

Full Access Member

Garyjw2

TYF Newbie

nkosmo

Member

ilaneDnokuY_05

TYF Newbie

Garyjw2

TYF Newbie

Similar threads

Forum statistics

Latest posts