Whirlwind FH-778 Air Conditioner "heat pump defrost cycle board" Questions

heat pump and am curious about how the defrost cycle works. Rather lengthy but here it is. The outside unit(heat pump) has a reversing valve, a defrost board, a crankcase heater, a metering device(txv

...Heat Pump MODEL 10PJA4201 which works Great, Good Cold Air in summer, Good Heat in winter, Until it gets really Cold out side, then it hangs up in the Defrost cycle the out door condensing unit only ...

...Heat Pump It hangs up in the defrost Cycle when it gets really cold out, causing only the Heat Strips and the Air Handler to recycle the indoor air which doesn't provide much Heat. If i bump the ...

...Heat Pump, installed 2002, Cool cycle 67psig suction, 230psig head pressure, Heat cycle 85 psig and 350+ psig New compressor, new reversing valve, new filter, new defrost board, cleaned all coils, ...

HEAT PUMP PROBLEMS MY HEAT PUMP SOME TIME GO TO THE MODE DEFROST EVEN IF THE SWITCH IS ON AC AND THE FAN OF THE HEAT PUMP STOP AND NO MORE COOL AIR OUT ONLY WARM. AND SOME TIME THE UNIT WORKS JUST ...

heat pump will not come on in HEAT or A/C. I thought I might have a simple defrost control board problem, but still no go after replacing the board and the defrost relay. I checked the pressure switch

...unit on heat pump is freezing up and I think the defrost cycle is not working. It is a 38C00 and I need a schematic. You'll need to replace the defrost board and thermostat to board hooked on to

...heat pump On a heat pump the system reverses during the heat cycle to bring in outside heat that will cause the outside coils to ice up. There is a defrost timer or pc board to send the unit into ...

...heat pump: want to bypass defrost thermostat Our heat pump is wanting to go into defrost mode constantly when we have it turned to heat. It attempts to go into defrost, but it sounds as if it keeps ...

...heat pump showing defrost relay area need to find diagram showing how to reset defrost timer to longer interval. Turn the power off to the heat pump and get a magnifying glass. There is probably only ...