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91 fox - no heat

12-10-2005, 12:54 PM
I'm not getting any heat out of my 91 fox sedan. The mechanical heater valve is open - hoses on both sides are warm. Is there a vacuum valve controling the airflow? Bently manual doesn't show one but? The AC works fine.

12-11-2005, 02:14 PM
It's usually the push button vacuum switch unit that fails.

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