1995 Buick Park Avenue Defrost Will Shut Off Vacuum Leak Already Replaced

1995 BUICK PARK AVENUE
64,000 MILES
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The defrost will not shut off. Is it a vacuum leak? already replaced the display...no change. Thanks, betsy
Oct 19, 2012 at 1:26 PM
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HMAC300
  • ✓Experienced Mechanic
  • 48,601 POSTS
it could be a vacuum leak either from engine or to one of the actuators in heater box. generic pic enclosed. seeif the actuators are getting vacuum first
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Oct 19, 2012 at 1:34 PM
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