True or False: The indoor coil remains permanently designated as an evaporator in a heat pump.

In a heat pump system, the designation of the indoor coil as either an evaporator or a condenser depends on the mode of operation—heating or cooling. While in cooling mode, the indoor coil functions as an evaporator, absorbing heat from the indoor air and transferring it outside. However, when the heat pump operates in heating mode, the indoor coil becomes a condenser, releasing heat into the indoor space as it condenses the refrigerant.

Therefore, stating that the indoor coil remains permanently designated as an evaporator is incorrect, as its function changes based on the operating mode of the heat pump.