The reversing valve in an air conditioning or refrigeration system is responsible for changing the direction of refrigerant flow. When in cooling mode, it redirects discharge gas to the outdoor coil and suction gas from the indoor coil. When in heating mode, it reverses the flow of refrigerant to transfer heat from the outside to the inside. The reversing valve is usually controlled by an electromagnetic solenoid, which is activated by a control system or thermostat. Want to learn more about the