what controls vacuum to the a c switch

Asked by 98firebird Sep 17, 2011 at 02:13 PM about the 1998 Pontiac Firebird Base

Question type: Maintenance & Repair

a c works but the switch wont change  to the vents or defroster, stays at the floor

2 Answers
865

Steven answered 13 years ago

check for vacuum on the line going the switch. if you have vacuum there check the line going to the heater box flap between heater core and evaporator core

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