hope its an easy fix...
ac/ heater control switch
Post Fiend
Joined: Feb 2007
Posts: 14,541
Likes: 2
From: Dallas-Ft. Worth
Your truck lost vacuum. If it's a 4x4 and has SOTF, check those lines (They also run off vacuum). Could also be your vacuum pump or the line coming in. If you take the kick panel off under the glove box, you can see the lines back there.
Post Fiend
Joined: Jun 2006
Posts: 9,714
Likes: 2
From: White Mnt's,New Hampshire
do you have shift on the fly 4x4?? if so check the hubs and work your way back looking for a vac leak..when you spring a vac leak the heater defalts to defrost..
lol sorry izzy.beat me to it
lol sorry izzy.beat me to it
Post Fiend
Joined: Feb 2007
Posts: 14,541
Likes: 2
From: Dallas-Ft. Worth
Originally Posted by ron's power stoke
do you have shift on the fly 4x4?? if so check the hubs and work your way back looking for a vac leak..when you spring a vac leak the heater defalts to defrost..
lol sorry izzy.beat me to it
lol sorry izzy.beat me to it
Post Fiend
Joined: Jun 2006
Posts: 9,714
Likes: 2
From: White Mnt's,New Hampshire
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Post Fiend
Joined: Feb 2007
Posts: 14,541
Likes: 2
From: Dallas-Ft. Worth
Originally Posted by bigoguide
My truck is not four wheel drive. So I should check the vaccum lines first.
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