A heat pump freezing up in the summer is as frustrating as it is puzzling. If it’s a device meant to transfer heat, why is it freezing, especially when the weather outside is so hot? The answer can be surprisingly simple, so keep your cool and take the time to learn why your heat pump is freezing up in the summer to understand how to fix the problem.
How Does a Heat Pump Work?
It’s helpful to know how heat pumps work to understand why they might freeze during summer. In cooling mode, a heat pump operates much like an air conditioner, moving heat from inside your home to the outside. This process, in tandem with a refrigerant to lower the temperature of outside air flowing into your home, cools your indoor space. The coolant circulates within the system, absorbing heat as it evaporates and releasing it when it condenses.
As it moves through the evaporator coil, the coolant absorbs heat from the indoor air, cooling it before it’s recirculated into your living areas. The heat is then expelled outside through the condenser coil. This ongoing cycle allows a heat pump to cool so effectively, and any disruption can cause issues like freezing.
Common Causes of Heat Pump Freezing in Summer
If you notice your heat pump freezing in the summer, you can usually narrow down why that is with a few tests. When you do, you’ll likely discover one of these common causes to be behind it:
Insufficient Airflow
Restricted airflow is a frequent culprit behind summer heat pump freezing. When airflow is limited, the evaporator coil can get too cold, causing moisture to freeze on it. This often results from dirty air filters or blocked vents. Keeping air moving freely through the system will avoid freezing.
Low Refrigerant Levels
Another cause of freezing is low refrigerant levels. Insufficient refrigerant lowers system pressure, making the evaporator coil excessively cold and leading to ice buildup. Leaks are a common reason for low refrigerant and need professional attention to fix. Address this issue ASAP to prevent further damage.
Thermostat and Control Issues
Thermostat settings and control malfunctions can also cause freezing. If the thermostat is set too low, the system might run nonstop, leading to overcooling and freezing. Make sure that the thermostat is correctly calibrated and functioning correctly while you use it during the summer. Regular checks and adjustments can help prevent these issues.
Solutions to Prevent Heat Pump Freezing
If your heat pump hasn’t frozen yet, that doesn’t mean it never will. Take a few simple steps to prevent this from happening.
Regular Maintenance
Regular maintenance keeps your heat pump in top shape. During these checks, technicians can clean and inspect components, catching potential problems early and reducing the risk of summer freezing.
Addressing Refrigerant Issues
If you suspect low refrigerant, contact a professional. Handling refrigerants requires expertise and equipment, and DIY attempts can be hazardous. A professional can safely check for leaks, repair them, and recharge the system, ensuring efficient operation.
Ensuring Proper Airflow
Maintaining clear airflow by regularly replacing air filters ensures air moves freely through your system. Also, check for and clear any blocked vents. Keeping these pathways open supports efficient operation and prevents freezing.
Chill Out by Keeping Your Heat Pump From Freezing During the Summer
Heat pumps freezing in the summer is more common than you might think. By staying aware of common causes like poor airflow, refrigerant leaks, and technical issues, you can keep your heat pump in top shape and your home nice and cool.
If your heat pump continues to freeze despite your best efforts, it’s time to consult a professional. Persistent issues might signal deeper problems that need expert attention. For dependable advice and service, contact The Heat Pump Store.
Image source: Kenneth Bagge Jorgensen via Shutterstock
