We have a Trane heat pump and A/C unit with an emergency heater option. Being only 5 years old, the emergency heat has never been needed. This unit, during normal years, always heats or cools while the outdoor fan is blowing on the coils that are providing heat or cool indoor coils to circulate the air. Recently, the outdoor fan does not turn or blow during heating. In March, we have used heat and a/c provided by changes of temperature early in the year. For the fan only to work with pushing or helping with moving in the right direction, it only begins to function. But we must place the thermostat in emergency heating during the night time. Otherwise, the outdoor fan does not move on its own. We are wondering what we can do or where we can fix this issue. Thanks!