AboutJ Cook Expertise With 25+ years experience, I am familiar with residential, commercial, and industrial HVAC equipment including but not limited to boilers, chillers, reciprocating and screw compressors. I am trained in all manners of control wiring.
Experience I currently have three HVAC licenses and Refrigeration license by the State of North Carolina. I have been in this field for over twenty years. I have been a service technician for a contractor and also worked at a state college in the repair and maintenance of steam lines and equipment. I am currently the Building Maintenance Superintendent for a municipality.
Question I have a 2 year old ADP air handler furnace. The blower motor does not shut off when the fan is in the "auto" mode after the desired temp is achieved. I replaced the blower relay switch and it did not help. I have to turn the furnace breaker switch off to get it to stop. It also seems to be circulating warm air when it is not cooling. I noticed that the electric bill last month was extremely high and while the blower was running we used 10KW in a single hour. Any suggestions?
Answer This could be a number of problems, but I would start with the thermostat. Go to the indoor unit with the power off and remove the wire on the thermostat terminal board on the W terminal. Turn the power back on and see it the heat still operates. Something is keeping the heat energized, thus keeping the fan also on. Thanks J
