Description
- The 47-21776-86 Rheem Ruud Heat Pump Defrost Control Board is brand new and comes in a anti-stat bag which is packed in a Genuine, Protech factory OEM parts box.
- The 47-21776-86 replacement heat pump defrost control board is used on many Rheem, Ruud heat pumps.
- This control board replaces control board part numbers: 47-21776-07, 47-21776-05, 47-21517-09, 47-21517-03, 47-21776-06, 47-21517-10, 47-21517-08.
- The defrost board comes with one defrost control board, limit switch/defrost sensor-auto reset (tube mount), wiring diagram and one instruction sheet.
- This defrost control board comes in a Protech OEM factory box in a sealed anti-static bag.
- FYI: If your heat pump looks like a block of ice in the winter time then you might need a new defrost control board. Other problems that can cause heat pump freeze ups are:
- (1) if the system is low on refrigerant charge or
- (2) if you have a bad defrost thermostat
- (3) If your contactor is stuck closed on the outdoor unit
- (4) Poor air flow on the outdoor unit by having a dirty coil or a dragging fan motor.
- (5) Reversing Valve Could be stuck and not shifting properly.
