I don't remember if that switches from hot to cold or feet to rooftop, but there is another one way over on the far left also
Haunted heater
- Thread starter 05Single
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when my Yukon started blowing cold air instead of atleast warm air in the back I replaced the rear heater core and that seemed to help I guess they can get clogged up and don't circulate the hot coolant very well so they don't blow as hot but I would only do that as a last resort if everything else is working, they are not expensive but its not super easy to do either.
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05Single
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Was gonna replace A first. Seems like feet blows warmer air. So B would follow if needed.
Then C is the control module right? Which I think is fine because I have all controls working, just no heat.
Then C is the control module right? Which I think is fine because I have all controls working, just no heat.
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This?
HiHoeSilver
Away!
Did you search hard? Because I also have no heat in the rear. Just blows cold, all functions working. I had been looking for the answer and found a thread that I can't find now, but I'm almost positive it turned out to be the module....
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05Single
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Not hard till now, just bumped an old thread instead of making a new one and started searching hard including YouTube.
yes, you should be able to see that little metal part turning when you adjust the heat controls, there is 2 of these on the rear unit, one will do hot/cold the other will do floor/rooftop, if that part is moving but it's not making any difference then pull it off and check the door inside to see if it is broken
HiHoeSilver
Away!
I thought i left the tab open, but alas, I sure didn't...
HiHoeSilver
Away!
Maybe this one? I didn't read again, it's short.
http://www.tahoeyukonforum.com/threads/no-rear-heat.68312/
im not sure about c that may only apply if you were not getting cold air but im just guessing because the heat is carried to the back heater core no matter what unless the rear is clogged or you have plugged the hoses at the firewall
