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Elliott-McElwee, Inc. Blog

Why Your Heat Pump Isn’t Changing to Cooling Mode


As the warm weather sets in, your comfort at home heavily depends on your cooling systems working seamlessly.We understand how frustrating it can be when your heat pump fails to switch from heating to cooling. If your heat pump is blowing out hot or merely room-temperature air when it should be cooling, there are several potential issues that could be at play. In this blog post, we’ll explore how heat pumps work, identify common problems, including a faulty reversing valve, and explain when it’s time to call in the professionals for heat pump repair in Egg Harbor Township, NJ.

Understanding How Heat Pumps Work

A heat pump is a versatile and efficient system used for both heating and cooling your home. It works on a simple principle of heat transfer. During the colder months, a heat pump extracts heat from the outside air or ground and transfers it indoors. Conversely, when you need cooling, the process reverses, and the heat pump pulls heat from your indoor air and releases it outside.

The key component that allows the heat pump to switch between heating and cooling is the reversing valve. This valve changes the flow direction of the refrigerant, which is pivotal in shifting the operational mode of the unit.

Common Reasons Why Heat Pumps Fail to Cool

1. Broken Reversing Valve

The most common culprit for a heat pump that fails to switch to cooling mode is a malfunctioning reversing valve. If this valve is stuck or damaged, the heat pump cannot change the direction of the refrigerant and consequently, can’t switch modes. This issue is a mechanical failure and requires professional expertise to diagnose and repair.

2. Loss of Refrigerant

Refrigerant is the lifeblood of your heat pump, essential for the heat transfer process. A leak or a drop in refrigerant levels can significantly impair the ability of your system to cool your home. If your heat pump has insufficient refrigerant, it might continue to blow warm air even in cooling mode.

3. Malfunctioning Thermostat

Sometimes the issue might not be with the heat pump itself but with the thermostat. A malfunctioning thermostat can fail to signal the heat pump to switch modes. This can be due to wiring issues, a dead battery, or simply a malfunctioning thermostat unit. It’s a less complex fix but just as crucial to address promptly.

4. Aging Heat Pump

Like any other appliance, heat pumps have a finite lifespan. An old heat pump that is nearing the end of its service life may struggle to perform efficiently. Components wear out and the system as a whole becomes less reliable. If your heat pump is old and consistently failing to cool your home, it might be time to consider a replacement.

Call for Professional Service

If your heat pump is not cooling, it’s best to address the issue so to avoid discomfort during the warm months. Whether it’s repairing a faulty reversing valve, fixing a refrigerant leak, replacing a malfunctioning thermostat, or evaluating the need for a new system, our team at Elliott-McElwee is here to help. With our expertise, we ensure that your heat pump is ready to provide you with a cool, comfortable home all summer long.

At Elliott-McElwee, Inc., your comfort is our business. And when your comfort require heat pump repairs or a replacement, just reach out to us. 

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