Question about 1999 Ford F150 Regular Cab
Hello.Yes,it is a vacume problem.What happens is that the vacume controled a/c control head looses engine vacume because the one-way vacume valve fails.This valve is located near the firewall.Follow the vacume tube coming out of the evaporator housing in the engine compartment.
Posted on Sep 29, 2008
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Posted on Jan 02, 2017
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