Question about 1997 Mercury Grand Marquis
Heard what sounded like a vacuum valve failing several weeks ago. Since then, whether car is set for A/C or heat, it only blows very hot air. A/C unit is charged. Is the valve that I suspect is the problem up in the dash board or in the engine compartment? Seems like it would be a valve to close off air flow thru the heater core and open access to the A/C evaporator.
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Posted on Jan 02, 2017
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