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Old 10-26-2010, 04:22 AM
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vent control problem

this is probably in the wrong place, but any ways. a buddy of mine is having problems with his heater vent controls. some times it works right, other times it it really delayed on switching from vent to defrost or any other option on the knob. he says that most of the time it is always on defrost no matter were the knob is pointing.

any ideas on where to look
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Old 10-26-2010, 04:29 AM
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Sounds like a vacume leak somewhere, or maybe the pump is going out. Pump is on the passenger side fender.
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Old 10-26-2010, 04:29 AM
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Check the vacuum pump under the hood and make sure that it is working at all times because without vacuum it will only operate in defrost.
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Old 10-26-2010, 12:19 PM
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is there any diagram to follow on the vacum lines?? i reciently removed my evaporater box and now i dnt have air through my vents either...
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Old 12-31-2010, 01:35 PM
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i fixed the problem today. it wasnt the vacuum pump. it turned out that the vacuum controller for the hubs was bad. causing a vacuum leak. it was a 77 dollar fix
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