2003 Chevy Monte Carlo Heater/ A/C

Tiny
RICK MEAGHER
  • MEMBER
  • 2003 CHEVROLET MONTE CARLO
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 63,000 MILES
Heater blows good air from a/c ducks on right side (cool) not hot, no air from left side Good air flow from heater and defroster but cool not real hot.
anti-freeze full, a/c? Started to blow a little cool at end of summer/ not real cold.
Why would air flow be good from heater/defroster outlets but not a/c ducks
Friday, November 20th, 2009 AT 8:37 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
It sounds like you have a vacuum leak. The vent doors that direct the air in the direction you want are run by vacuum. Start by checking for vacuum leaks under the dash. IF the engine is running, you may actually hear a hissing sound.

Let me know what you find.
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Saturday, December 5th, 2009 AT 7:57 PM

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