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Serving Katy, TX and the Surrounding Areas

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Serving Katy, TX and the Surrounding Areas
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AC Comfort Blog

Why Your Heat Pump Isn’t Switching to Heat Mode


Many homeowners love heat pump systems because they are so versatile. They can provide either heating or cooling, making them an ideal all-in-one system. But sometimes a heat pump can struggle when it’s time to switch between cooling mode and heating mode.

When this happens, you may be wondering what’s wrong – and if it’s a major problem that’s going to cost a lot of money. You may even be tempted to search online for a DIY solution, but fixing it yourself can do more harm than good. 

If you need heat pump repair in Katy, TX our team is here to help. Keep reading to learn more about why your heat pump may be struggling to switch over to heating mode. Then give our team a call to assess your heat pump system and offer a solution. Don’t ignore the problem if your heat pump isn’t switching to heat mode. You want to fix any heat pump problems sooner rather than later or the problem will only worsen.

Heat Pump Reversing Valve

Your heat pump switches between heating and cooling modes thanks to the reversing valve. This valve allows the flow of refrigerant to reverse so that it can bring heat into your home during the winter and takes heat out in the summer. The valve itself may become stuck or fail, or the wiring that is connected to the valve may wear down and lead to miscommunication within the heat pump system. 

A heat pump system uses refrigerant to provide heating and cooling, so there’s a possibility of a leak in the refrigerant line that is close to the reversing valve. If refrigerant leaks out, it can block the switch from moving back and forth to change between modes, leaving it stuck. If your valve was set on cooling mode when the leak happened, it may not switch over to heating mode when you want. 


The problem may not be with your heat pump at all. Your heat pump relies on the thermostat to communicate when it’s time to turn on for heating and cooling, along with when to switch between different modes.

Sometimes, the thermostat gets miscalibrated or loses its connection to your heat pump. Of all the problems to have, this is an easy one to fix, although it’s possible that your thermostat will need to be replaced. 

Other Heat Pump Issues

Sometimes your heat pump valve is in the correct mode and your thermostat is working exactly as it should, but you’re still not feeling the heat.

You should never feel cool or lukewarm air when your heat pump is set to heating mode. If you do, it’s a red flag that something is wrong. Even if your home still feels fairly comfortable, it’s important to get the problem checked out by our team of professionals before your heat pump stops working completely. It may be an indicator of a refrigerant problem such as a leak.

Your comfort is our business! Serving Katy, TX, and the surrounding areas. Schedule an appointment today for heat pump service.

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