Vent to defrost under acceleration
Thread Starter
Newbie
Joined: Sep 2010
Posts: 5
Likes: 0
Model: Cherokee
Vent to defrost under acceleration
Like the title says under acceleration my heater goes from vent mode to defrost. It seems like this would be a issue with vacume somehow but I'm just not sure what would be causing the decrease in vacume to change things. Anyone else have this problem?
CF Veteran
Joined: Feb 2010
Posts: 12,367
Likes: 23
From: Oroville, CA
Year: 1995
Model: Grand Cherokee
Engine: 4.0 with all of the noise and clatter
You may have a cracked vacuum resevior, depending on what year your Jeep is, it may be behind the bumper cover on the right side, or under the battery tray.
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