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Question Asked: Blower fan won't come on. Replaced switch and resister checked all fuses.
October 05, 2014, 05:23 PM
Blower works for back of van.
Problem Reported: HVAC Air Flow Switching to Defrost When Accelerating
September 15, 2010, 10:05 PM

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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