Furnace flame sensor. The flame sensor monitors the burner to detect whether or not a flame is present. If the flame sensor is defective, the furnace may not heat.
Triple-D Coil Cleaner is a 19oz Aerosol spray can, that is safe for homeowner use. One can will clean an entire outdoor condenser coil and/or indoor evaporator coil, to remove energy-stealing dirt, debris and soot.
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