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» HVAC Air Flow Switching to Defrost When Accelerating
Dodge Dynasty
Report: HVAC Air Flow Switching to Defrost When Accelerating
Dodge Dynasty Problem
Model Years Affected: 1990, 1991, 1992, 1993
Verified
The AC/heater (HVAC) system may unexpectedly switch to the defrost mode when accelerating. This system is operated by engine vacuum and should be inspected for any vacuum leaks if this problem develops. There is also a revised vacuum check valve available to address this concern.
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Need to locate the idle air control valve to clean it or replace it.
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