Hello, I just realized that my home heat pump compressor keeps running and freezing the line by bypassing the thermostat. I believe the thermostat itself is still in good working order because if I set it to a temperature lower than the outside temperature, compressor and condenser fan come on, and when it reaches the preset temperature, the condenser fan stops spinning while the compressor keeps working and freezing the line. Any idea of what is wrong? Thanks in advance for any help/suggestion.
Alex