If you think the valve is stuck, tap on both sides of the valve body with a soft object like the plastic handle of your screwdriver. This may allow the valve to open. If it does, try forcing the valve to change positions a few times to make sure it’s working properly. If it does, then the issue could be solved.

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When a reversing valve sticks, what causes it to do so?

A bad solenoid coil that lacks enough voltage to move the reversing valve causes most reversing valves to stick. The actual valve may be physically stuck in some cases, preventing the solenoid coil from moving the valve.

How can you tell if your reversing valve is bad?

Defective reversing valves can be difficult to spot, especially in mild weather. Higher-than-normal back pressure and lower-than-normal high-side pressure, as well as low system capacity, are common symptoms of faulty compressor valves and bleeding reversing valves.

How much does a reversing valve repair cost?

A malfunctioning reversing valve will cost between $450 and $600 to replace.

Is a low refrigerant going to result in a high head pressure?

Because low condenser subcooling can indicate a low charge, it’s a good indicator of how much refrigerant charge is in the system. Excess refrigerant will build up in the condenser, resulting in excessive subcooling and high head pressures.

What causes a heat pump’s high head pressure?

In the same way that a dirty outdoor coil causes high head pressure in cooling mode, restricted airflow/a dirty coil causes high head pressure. Check filters as well as make sure that register grilles in specific rooms haven’t been closed off.

On a heat pump, what controls the reversing valve?

A reversing valve is controlled by a solenoid and operates by a pressure difference inside a metal tube. The reversing valve is energized or de-energized by an electrical connection from the thermostat. A heat pump stuck in one mode or the other due to a broken reversing valve.

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