I replaced air filter and adjusted blower speeds to stop the furnace from overheating. Furnace ran for over 30 minutes without issues while I was here. I cleaned flame sensor as well. Blower motor bearings are starting to give out. Blower is struggling to start and run. I informed customer of the current condition of the blower motor. Customer opted to run the furnace till the blower dies. Customer would also like a call next week about the membership.