On arrival I performed a tune up on the furnace and could hear the blower motor was rattling. On further inspection I discovered that the blower capacitor was weak and almost below rating. The blower wheel along with the blower motor where dirty, causing restrictions and degrading the blower motor. I also found that the evaporator didn’t have a safety float switch equipped. I installed float switch and changed the filter for the homeowner. I will be returning at a later date to replace blower motor.