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Serving Southern Brazoria County

Why Your Heat Pump Is Stuck in Cooling Mode

Turning on your heat pump in winter and being greeted with a blast of cold air isn’t the most pleasant experience. Typically, having a heating system that can switch between heating and cooling modes is considered an advantage. That’s only the case if the system can actually switch between modes, however. If your heat pump is stuck in cooling mode and nothing you do can get it to switch, read on.

The Source of the Problem

The reason that a heat pump can act as both a heater and an air conditioner is a part called the “reversing valve.” This valve sits in the refrigerant line, and determines what direction the refrigerant flows at any given time. Inside the valve is a slide that can move between two positions. In one position, the refrigerant flows in one direction and the heat pump heats the home. In the other position, the refrigerant flows in the opposite direction and the heat pump cools the home. The slide is controlled by an electromagnet called the “solenoid,” which moves it from one position to the other. Without this part, the heat pump would be little more than an air conditioner.

Possible Issues with the Reversing Valve

If your heat pump is stuck in one mode, it means that the system is probably having an issue with the reversing valve. There are two common issues with the reversing valve: either the slide in the valve is stuck, or the solenoid that controls the valve has lost its charge. If the slide is stuck, all that needs to happen is that it be unstuck. If the solenoid has lost its charge, it probably needs replacing.

If your heat pump is stuck in one mode, call Switzerland Air. We offer heat pump services throughout Lake Jackson, TX. 

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