Vaccum Controled Temp. Problem
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Vaccum Controled Temp. Problem
I got 82 f250 and the vaccumed control temperature control and the selection of what thing you wnat to use (vent, ac, defrost) doesn't work right. First off, the temp switch under the hood doesn't move. How does that work? Then, the selection thing for use doesn't really work. All it can do is turn the a/c compressor on and put the air out the defrost vent. The regular vent doesn't work nor does the floor. How does this all work. I beleive there is a leak somewhere. When I would press the brakes in, you can hear a leak some where of vaccum.
Ford Parts Specialist
Joined: Nov 2006
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From: Simi Valley, CA
Originally Posted by cghstrojan08
I got 82 f250 and the vaccumed control temperature control and the selection of what thing you wnat to use (vent, ac, defrost) doesn't work right. First off, the temp switch under the hood doesn't move. How does that work? >>>>> Then, the selection thing for use doesn't really work. All it can do is turn the a/c compressor on and put the air out the defrost vent. The regular vent doesn't work nor does the floor. How does this all work. I beleive there is a leak somewhere. When I would press the brakes in, you can hear a leak some where of vaccuum. <<<<<
>>> E7TZ-19B888-A .. A/C Vac Control Temp Valve (Motorcraft YH-467)<<<
Last edited by NumberDummy; Apr 18, 2007 at 07:09 PM.
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From: Virginia
If you want to check the vacuum supply, look on the firewall under the hood, and follow the line from there over to the passenger side of the truck. Make sure everything is still hooked up and in good shape.
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Joined: Feb 2007
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I just fixed this same problem on mine. The vacuum line was rotted where it comes out of the cab into the engine compartment. Replaced it, and the defrost/vent door opens and closes correctly again. Remove your glove box, then take off the piece covering the heater core and you can see the door.
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Joined: Jun 2003
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From: shepherd
i got a similar problem. it blows out of the main vents all the time. it will open up the defroster and floor but they don't blow good because the main vents are still open. i looked under there and there is only one cable for the temp. control. it looks like there should be another cable connected to the vent selector as there is a cable mount. this is a vacuum system. the a/c compressor does turn on with the vent selector though
