B1 Clean & Check Service Garage furnace Blower motor is leaking oil. It also doesn’t have a filter slot, so it currently doesn’t have a filter. Furnace is working at this time. Basement Furnace Blower wheel has some buildup on blades. Filter slot doesn’t have a good seal and sucking air from basement. The transition box on the Supply side has Come apart and a new one needs to be installed. Also the high voltage and low voltage need to be installed correctly.