1996 Ford E-series Van Have a 1996 E250 Van Which When I Have A/C on and Fan Blowing. When

1996 FORD E-SERIES VAN

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Have a 1996 E250 Van which when I have A/C on and fan blowing. When accelerating on a hill all airflow diverts to defrost vents.If let up on gas the air comes back to the A/C vents. I have a vacuum gauge under dash and vacuum stays at 18 to 20 while this happens. What could be causing this?
Ford dealer where I live could not figure it out. Also a A/C n Heat shop couldn't either.

Jan 12, 2013 at 5:02 AM

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