Why Isn’t My Heat Pump Switching to Warm Air? | Comfort Zone
November 9, 2015

While our days here in Dunwoody, GA are still fairly warm, our nights have been chilly enough to switch on the heat, even for a little bit. If you own a heat pump system, switching from cool to warm should be as easy as pressing a button. But what happens if you press the heat and feel only cool air still, or nothing at all? Then it is time to call the HVAC pros at Comfort Zone Heating & Cooling for heat pump repair.

Reasons for Non-Switching

There can be a few reasons why your heat pump isn’t switching into heat mode as needed:

  • There’s a refrigerant leak – there are a number of places that a refrigerant leak can develop in your system, and one of them is the reversing valve. The reversing valve is the component that allows your heat pump system to switch between modes, but a refrigerant leak can stop this from happening. If a refrigerant leak is found in your heat pump’s reversing valve, the valve will need to be replaced.
  • The solenoid on the reversing valve isn’t working properly – within the reversing valve is a sliding mechanism. A small electronic component known as a solenoid sits on top of the reversing valve to help give the sliding mechanism a little push to move. The solenoid can go bad or malfunction, and when this happens, the reversing valve won’t likely be able to switch modes. The good news is that solenoids can be repaired or replaced if needed without having to replace the entire valve.
  • The reversing valve is stuck – this is another case where the valve will need to be replaced if in fact this is the reason your heat pump isn’t switching modes. The reversing valve can get stuck in a specific mode or in-between modes.

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