heater servo HELP!!
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Joined: Dec 2006
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heater servo HELP!!
i have a 89 f-150 302 . heater will not switch from defrost to vent...floor etc. i have read some of your other listings and have checked for broken lines to servo in and out of truck. i am not getting any vacuum to servo but i dont have any broken lines. what feeds the servo with vacuum?? also when i push the vacuum switch under glovebox vents work but i have no vacuum there either. any help would be greatly thanked!!!
Thread Starter
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New User
Joined: Dec 2006
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thanks steve buttt i did check all the lines thats what has me confused they are all great. i know im missing something but cant figure out what. i traced them all to their "ports" and none of them are cracked or broke. any other ideas would be appericated
