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1992 Dodge Shadow Heater doesn't blow air when accelerating

Tiny
PLBIEGERT
  • MEMBER
  • 1992 DODGE SHADOW
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 147,000 MILES
In my dodge shadow when I accelerate my heater doesn't blow air out of the vents. It sucks the air back in and blows it out of the vents for the defroster. What would cause this and how could we fix it?
Friday, April 30th, 2010 AT 1:00 PM

1 Reply

Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
Vacuum leak in the vacuum supply line, or vacuum reservoir. The supply line comes off the intake manifold, goes to the tank, and then into the heater control thru the firewall.
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Friday, April 30th, 2010 AT 1:38 PM

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