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Blowing cold air all the time, hearing clunking sound behind control system.

(1999 Ford Windstar)
in Michigan City, IN on February 22, 2011
started four days ago,heater blowing cold air, all the time.also hearing clicking sound.
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Popular Answer
on February 22, 2011
The noise that you are hearing is an air circulation blend door actuator that has failed. This actuator moves doors to direct air flow or blend heat and cold. Sometimes the dash needs to be removed depending on which actuator failed.
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