Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum - View Single Post - Overheating and no heat
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Old 01-23-2013, 11:09 PM   #8
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There is some misinformation here that should be cleared up.

A stuck closed t-stat will indeed cause a car to overheat. But it alone will not cause a no heat condition. The no heat condition will be caused by a lack of coolant, a plugged heater core, blend air doors not moving, etc etc, but not a stuck closed t-stat.
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