2005 Ford Freestyle heat blows cold on one side

dashboard heating passenger heat driver cold why

The blend door for the drivers side isn’t working.

This could be due to a faulty blend door actuator, https://www.rockauto.com/en/catalog/ford,2005,freestyle,3.0l+v6,1431202,heat+&+air+conditioning,heater+blend+door+actuator,10721, a broken blend door, or a faulty climate control module.

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