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Peatson's Heating and Air Conditioning Ltd. Blog

Why Won’t My Heat Pump Switch to Cooling Mode?

Service technician with a customer. Plumbers, electricians, cable repair, etc.

If you have a heat pump in your home, you’re probably quite impressed with its performance. These HVAC workhorses provide year-round comfort, both heating and cooling your home.

Although they might seem infallible, just like any piece of complex equipment, they can run into problems. Especially when they’re not maintained properly. A common issue is when a heat pump gets stuck in one mode and doesn’t seem to switch when you need it to. 

If you’ve currently got a heat pump that staunchly refuses to cool your house, you may need to call our technicians for heat pump repair in Mississauga, ON. Let’s examine some possible causes of the heat pump that won’t switch to cooling mode and what can be done to resolve this.

The reversing valve is broken.

This is a common cause of a heat pump that won’t switch from heating to cooling. The reversing valve is the essential component that allows it to switch from cooling to heating and vice versa.

It works by changing the direction that the refrigerant flows when it leaves the compressor. This simple concept is what allows a heat pump to function as both a heating and cooling system. And when it malfunctions, you’re stuck with one or the other. 

The reversing valve is possibly either “stuck” or broken. Fortunately, this is not a difficult problem for our technicians to solve. We can replace the reversing valve and get your heat pump back to proper working order.

The thermostat has a failed connection or is miscalibrated.

Sometimes a troublesome heat pump can be due to the thermostat. A malfunctioning thermostat can also cause the heat pump to not adequately cool down your home. That’s because the thermostat is the “brain” of your system.

The thermostat signals the compressor and blower fan to turn on and off. It’s also responsible for sending the signal to the reversing valve when it’s time to switch between heating and cooling. A thermostat can lose its connection to the reversing valve but still be able to tell the compressor and fan what to do. A technician will check the thermostat to make sure it’s not the issue. 

Another possible thermostat issue is if the thermostat is reading your home’s temperatures incorrectly. If the thermostat thinks the house is hotter than it is, it won’t even turn the compressor on to start the cooling cycle. Our technicians can recalibrate a thermostat to restore your home comfort.

The air filter is clogged.

There is one DIY fix that may take care of a heat pump that’s blowing lukewarm (not hot) air. Check to make sure the air filter is clean. A dirty and clogged air filter can cause the heat pump to struggle to adequately cool down your home. If it’s dirty, put in a new one and see if that helps.

When you have a home with a heat pump, you need a reliable team that can keep your system running effectively. That’s where we come in. 

Contact Peatson’s Heating and Air Conditioning Ltd. for reliable heat pump repair in Mississauga, ON.

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