2000 Ford F150 AC venting issue

Hi all,

Got a good one. When I run my air conditioner the vents will switch from panel to defroster. This occurs when I press the gas pedal. When I let off the gas, the air switches back from defroster to panel. Anyone know how to fix this?

Thanks.

Reply to
James W. (Jim) Grimes
Loading thread data ...

There's a check valve that keeps the engine from pulling the vacuum out of the HVAC system under load. Yours is either bad, or you have a leak somewhere after it.

Reply to
JimV

Reply to
djdave

Thanks all for the answers. Now where do I find the diagrams of the vaccuum system so I can find the problem?

Thanks again.

Reply to
James W. (Jim) Grimes

MotorsForum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.