If your heat pump seems to be running non-stop, it’s usually a sign that something’s not quite right. Sometimes, a simple fix can solve the problem, but other times, you’ll need a professional to take a closer look.
At Hill-Air Heating & Air Conditioning, we’ve been helping homeowners in Fairfield, Ohio, and the Greater Cincinnati area keep their heat pumps running smoothly since 1986. In this blog, we’ll break down some of the most common reasons why your heat pump might be working overtime, share a few quick fixes you can try, and help you decide when it’s time to call in our expert technicians for heat pump repairs.
8 Reasons Why Your Heat Pump Never Shuts Off
Your heat pump should cycle on and off throughout the day to keep your home at the right temperature. If it’s running around the clock, this isn’t normal behavior. This kind of constant operation can send your energy costs soaring and put a lot of stress on your heat pump, leading to more frequent repairs and even a shorter lifespan for your current system.
Understanding why your heat pump won’t turn off can help you fix the issue faster and avoid some of the more expensive heat pump repair costs. Here are eight common reasons your heat pump isn’t shutting off:
1. Low Refrigerant Levels
If your heat pump is low on refrigerant—often due to a refrigerant leak—it can’t efficiently transfer heat. This forces the system to run continuously as it struggles to maintain the right temperature. Low refrigerant levels can also cause your heat pump to freeze up, making the problem even worse. In this case, it’s best to call in heat pump specialists to inspect the refrigerant lines, repair any leaks, and recharge your system.
2. Clogged Air Filter
A dirty or clogged air filter can block airflow, making it difficult for your heat pump to circulate air properly. When airflow is restricted, your system has to run longer to reach the desired temperature. Replacing the filter regularly is one of the easiest ways to keep your heat pump running efficiently and prevent it from staying on constantly. Keeping your filter clean also helps protect other parts of your HVAC system, reducing the risk of a broken heat pump.
3. Malfunctioning Thermostat
Your thermostat acts as the control center for your HVAC system, so if it’s not reading the temperature accurately or has a glitch, it might not signal your heat pump to turn off. A malfunctioning thermostat can cause your heat pump to run continuously or switch to emergency heat mode, which can significantly increase your energy bills. Checking your thermostat settings—or upgrading to a smart thermostat—can often fix the issue.
4. Faulty Reversing Valve
The reversing valve is what allows your heat pump to switch between heating and cooling modes. If this valve is stuck or malfunctioning, your system might get trapped in one mode, causing it to run continuously. A faulty reversing valve usually requires a professional HVAC repair as it involves handling refrigerant and specialized parts.
5. Leaking Refrigerant Lines
Refrigerant leaks are a serious issue that can cause your heat pump to run endlessly without effectively heating or cooling your home. In addition to making your system inefficient, leaking refrigerant can also damage the compressor—a costly repair. If you suspect a leak, it’s best to call for emergency heat pump repairs right away. A certified HVAC technician can locate the leak, fix it, and recharge your system to prevent further damage.
6. Failing Compressor
The compressor is the heart of your heat pump, responsible for circulating refrigerant and maintaining pressure. If the compressor is failing, your system might run non-stop without effectively heating or cooling your home. A struggling compressor can be a sign that you need a heat pump replacement. In some cases, a replacement might be more cost-effective than repairing an older heat pump, especially if you’ve been dealing with frequent repairs.
7. Cold Weather Challenges
Heat pumps extract heat from the air, but during extremely cold weather, they can struggle to work efficiently. If your heat pump is running non-stop on cold days, it might be time to consider a hybrid furnace setup. A hybrid system pairs a heat pump with a furnace, so when temperatures drop too low for the heat pump to work efficiently, the furnace takes over. This setup can help keep your home warm without overworking your heat pump.
8. Improper Sizing or Installation
If your heat pump is too small for your home or was installed incorrectly, it might run constantly without ever reaching the right temperature. An undersized unit will struggle to keep up during peak heating or cooling seasons, causing it to work overtime. On the other hand, improper installation can cause airflow issues and reduce efficiency. Having an HVAC technician evaluate your current system can help you decide if you need a new unit or if adjustments can improve performance.
Heat Pump Won’t Stop Running? Here Are 5 Troubleshooting Tips to Help
When your heat pump seems to be running non-stop, it’s frustrating—and a little concerning. The good news is that some common causes have simple solutions you can try yourself before calling a heating and cooling company for help.
- Check the Air Filter: A clogged air filter can block airflow, making it harder for your heat pump heater and air conditioner to work efficiently. Both central air conditioning systems and heating systems need clean filters to move air properly. Check your filter and replace it if it’s dirty.
- Inspect the Thermostat Settings: Your thermostat tells your heat pump what to do, so even a small mistake can cause problems. Make sure it’s not accidentally set to emergency heat or a higher temperature than needed.
- Clean the Outdoor Unit: Leaves, dirt, or ice buildup around your outdoor unit can block airflow, making your heat pump run constantly. Make it a habit to clear away debris and gently rinse off any dirt on the coils.
- Reset the System: Sometimes, a simple reset can help clear minor glitches in your heat pump. Turn off your heat pump at the thermostat and the circuit breaker, wait a few minutes, and then turn it back on.
If none of these tips solve the issue, it’s time to call a professional service. An experienced technician can perform a thorough inspection and diagnostics and figure out if you need repairs or just a bit more maintenance (we recommend scheduling heat pump maintenance twice a year) to keep your system running efficiently through the season.
Trust Hill-Air for Your Heat Pump Repair in the Fairfield Area
When your heat pump isn’t working properly, you need certified experts who can fix the problem fast. At Hill-Air Heating & Air Conditioning, we specialize in heat pump repair and maintenance for all types of systems, including ductless mini splits. With decades of experience, our certified technicians can handle everything from minor fixes to emergency heat pump service.
Our maintenance plans also make it easy to keep your heat pump running efficiently year-round. Regular maintenance not only improves performance but also helps catch small issues early, saving you money on costly repairs.
As a family-owned heating and cooling company, we’re committed to honest advice and reliable service. Need a heat pump repair in Fairfield, OH, or the surrounding areas? Contact Hill-Air Heating & Air Conditioning today!