White-Rodgers 47D40-801 Heat Pump Defrost Demand Control Board, Replacement for Rheem Feature_Flame-Resistant 3 forms of AC/DC voltage

3 forms of AC/DC voltage indication: light

resistance

3 m) descending increments allow you to more accurately measure the length of conduit runs and determine the amount of tape left to pay out

adapter-free design easily attaches most tools

White-Rodgers 47D40-801 Heat Pump Defrost Demand Control Board, Replacement for Rheem Feature_Flame-Resistant 3 forms of AC/DC voltageWhite Rodgers 47D40 801 Heat Pump Defrost Demand Control Board, Replacement for Rheem The 47D40 801 control is a microprocessor based demand defrost controller intended for Rheem heat pump systems. This controller uses basic differential temperature means to detect degradation of system performance due to ice build up on the outdoor coil. The controller uses self calibrating principles to calibrate to the heat pump system. The defrosting is performed