why does my heat pump outdoor compressor unit ice up all over the unit?

HI, This relates to the outside carrier heat pump unit. Symptoms are: the unit is receiving the signal to turn on from the inside thermostat. The contactor clicks closed (audible). There is a humming sound. I think in is the compressor. The large fan on the outside unit does not rotate. I...

How do you tell if your outside unit is a heat pump or compressor

I need the low voltage wire colors and what there for please

Emergency heat works, ac works but outdoor heat pump doesn't come on on a call for heat. I have 24 volts to red and white wires at the unit. I've checked the ambient switches and their good. Don't know for sure that the problem is the board but red and white voltage going in and contactor doesn't...

I live in central Virginia and am replacing my oil furnace with a heat pump. Is the east or west side of the house better for location of the outdoor unit. I thought west side for heating but not for cooling. Just the opposite for cooling. Please help!