Air Conditioning blows out wrong vents
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Freshman User
Joined: Jan 2000
Posts: 33
Likes: 1
Air Conditioning blows out wrong vents
I have a 90 Ford F-150 4wd. 351w. When driving at highway speeds, I notice that my A/C will go from blowing out of the dash panels and go to the defrost. The only way I can have the air come back to the panel is to slow the vehicle down. This only happens at speeds above 70mph. Any suggestions? Maybe something with the vaccumm?
Posting Guru
Joined: Feb 2000
Posts: 1,100
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From: Wichita USA
Air Conditioning blows out wrong vents
Check vacuum line from intake source to vacuum reservoir. From vacuum reservoir to firewall. From firewall under dash inside to vacuum control valve on control panel.
