If I switch it back to cool, it starts humming again. You can do this yourself, which involves disassembling the unit, or you can call an Air Conditioning Repair Altamonte Springs FL (localhome.pribind.pw)-conditioning professional.
Subject: I need this company. Pickup at a local Freight dock is available and recommended. We are always here to assist you. In some cases, all the mounting hardware is accessible, including the set screw to attach the blower to the motor shaft.