Question about 2001 Ford F250 Super Duty Super Cab

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03 f150 heat only comes out defrost

I have an 03 f150 supercrew. it has the automatic climate control system in it. when the heat is on it will not switch from the defrost. if i turn the ac on it will blow out the panal, any ideas?

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You have a vacuum leak. Defrost is the default postion (no vacuum). Since it is working correctly in the ac postion I would suspect the problem is at the floor/panel door.This one is located on the drivers side of the heater box just to the right of the accelerator pedal.

Posted on Jan 30, 2009

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