heat in the back system
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Professional
Joined: Mar 2011
Posts: 130
Likes: 0
From: Mena, Arkansas
heat in the back system
Other than my pcm problems I've noticed that no heat comes out of the back vents. I've use front control and rear as well- no heat at all.
I can't tell if it will blow cold yet because my system needs a charge, and that won't happen until the pcm problem is fixed.
Is there anything I can check to see why the rear air isn't warm? Thank you.
I can't tell if it will blow cold yet because my system needs a charge, and that won't happen until the pcm problem is fixed.
Is there anything I can check to see why the rear air isn't warm? Thank you.
THE ULTI-MOD
Joined: Jan 2007
Posts: 19,797
Likes: 36
From: Union NJ
do the rear vents blow at all?
if the are blowing air and its just not warm do you have the rear heat/ac controls? if so adjust the temp from there, if it doesnt change, crawl underneath when the truck is warm (engine warm) and feel the lines going into the rear heater core, they are on the passenger side, just behind the back door. If one of them is cold you have a clogged rear heater core, if they are both hot then you have a bad blend door in the rear system.
if the are blowing air and its just not warm do you have the rear heat/ac controls? if so adjust the temp from there, if it doesnt change, crawl underneath when the truck is warm (engine warm) and feel the lines going into the rear heater core, they are on the passenger side, just behind the back door. If one of them is cold you have a clogged rear heater core, if they are both hot then you have a bad blend door in the rear system.