1994 CHEVY BERETTA NO FRONT DEFROST

  • Tiny
  • misterc
  • 1994 Chevrolet Beretta

Heater problem
1994 Chevy Beretta 6 cyl Front Wheel Drive Automatic 184k miles

when I put the selecter switch to either heat or defrost hot air blows out of the front vents no heat is felt at the windshield and no heat is felt at the floor vents when the selector is put to the " heat" position.I was able to find out that the selector control is a switch, not the old style of a cable opening and closing a vent door on the heater box to divert/direct the hot air flow.

Monday, October 5th, 2009 AT 1:09 PM

1 Answer

  • Tiny
  • Jacobandnickolas
  • Expert
  • 68,287 posts

The vent doors are actuated by engine vacuum. Check for vacuum leaks under the dash and from the soruce at the engine. With the engine running, you may get lucky and hear a hissing sound.

Let me know what you find.

Joe

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Monday, December 21st, 2009 AT 10:12 AM

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