Heating Cooling Modes Animation Expansion Valve Condenser Compressor Reversing Valve Evaporator HEATING MODE COOLING MODE When in cooling mode, the valve is reversed to match the flow of the liquid. When in heating mode, a valve is used to control the flow of the fluid from outside your home and the fluid inside the heat pump. 32° 28° 80° 70° 75° 90° 55° 78°
