1996 Ford Aerostar On Vent Heating After Driving 10 Minutes Heat Gauge Will

1996 FORD AEROSTAR
24,000 MILES
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When on VENT for heating, after driving for 10 minutes or so, the heat gauge will slowly move to the L on "normal" and then drop back to the O. The rear heat blows ambient temperature.

I have replaced the small single-line vacumm switch that goes to a "t" and then to vacumm reservoir & into heater plenium.

Water pump is new.
Oct 29, 2012 at 4:08 PM
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HMAC300
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check to make sure rear is gettinghot water on both hoses then check actuators. check coolant level if low have pressure tested for leaks.
Oct 29, 2012 at 5:01 PM
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