weak

  1. S

    Fan blower issue. Fine on cool, but very weak on Heat mode

    I'd like to ask here, I have a 2010 2500. fan blows fine on cool but when moved to heating, you can hear the doors move around and feel the air flow change to the desired vents, but the air flow is weak on heat. switch it back to cool and blows fine. doesnt matter which set of vents I move...
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