Discussion in 'Volvo Forum' started by Russian Rabbit, Sep 2, 2020.
Is there a way to check if the a/c-heat blend door is closing all the way?
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Front cab ac heat unit doesn’t use a blend door, it is controlled by a coolant valve to the heater core. All the air goes though the heater core 100% of the time. Blend doors are only for directing air flow paths.