heat/ac issue

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2515x3jj

Junior Member
Joined
Aug 27, 2019
Posts
17
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Location
Newport, Pa
Ram Year
95/03
Engine
5.9/5.7
Hello to all and thks for looking at my post. My issue is the ac/heat blows out the defrost on acceleration and when I let off it goes back to the selected position. I can hear a door shut when letting off. Is there anyone who experienced this issue. And what was your fix. I'm putting a heater core in this weekend and this would be the time to check for the problem. Thankyou
 

Mop

Senior Member
Joined
Aug 5, 2017
Posts
110
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42
Ram Year
1999
Engine
360
You'll find other threads on this. It's a vacuum leak. Look at the thin, black hard plastic tubing on the firewall, passenger side. The line probably has a crack, or the check valve is bad.
My line was cracked, and I cut it off, added 3mm rubber tubing onto the existing line. Simple, cheap fix.
 
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