As the Cincinnati weather fluctuates, homeowners may be concerned by the seemingly constant running of their heat pump. While longer run times can be normal as the system attempts to provide consistent comfort, nonstop running paired with rising energy bills may signal a deeper problem.
In this article, the HVAC experts at National Heating and Air Conditioning discuss why a heat pump may seem to run constantly in the cold, along with serious problems that could require professional attention.

Is It Normal for a Heat Pump to Run All the Time?
Heat pumps are designed to run longer than furnaces, but should still cycle off periodically. If you notice nonstop operation, there is a good chance that your system is experiencing efficiency loss, mechanical strain, or sizing issues.
Common Reasons a Heat Pump Runs Constantly
Dirty or Blocked Coils
Dirt buildup on indoor or outdoor coils will reduce heat transfer, forcing your heat pump to work harder and longer to maintain temperature. A simple cleaning can often restore proper operation for your system.
Thermostat Problems
Some heat pump issues are actually a result of thermostat problems. Things like incorrect settings, calibration issues, or faulty thermostats can cause your system to run continuously without reaching the desired temperature.
Extreme Weather Demand in Cincinnati
Extended cold snaps, freezing rain, and wide temperature swings can increase system demand for your heat pump. If it has underlying weaknesses, the extreme weather can expose them, resulting in the need for a professional diagnosis and repair.
Poor Insulation or Air Leaks
Cincinnati homes with drafts or insufficient insulation, especially in attics, can experience significant thermal transfer. This heat loss then forces your heat pump to keep running in an attempt to keep up, resulting in added strain and energy usage.
Serious Problems That Can Cause Constant Operation
Refrigerant Leaks
A refrigerant leak is a serious issue that can cause constant running. Low refrigerant levels prevent proper heat transfer in your heat pump, causing the system to run nonstop while delivering little comfort.
Failing Compressor
As the heart of the heat pump, compressor issues can cause major problems. When it begins to fail, efficiency drops sharply and run times increase, leaving you with increased energy bills and minimal heat.
Undersized or Aging System
If your heat pump is aging or too small, it may not be able to keep up with heating or cooling demand and run constantly. This often requires replacement.
Why Rising Energy Bills Are a Warning Sign
Nonstop operation dramatically increases energy use, adds strain to components, and accelerates wear that can lead to total system failure. That’s why homeowners should call for an expert inspection and diagnostic testing to determine why their heat pump is running constantly.
When to Shut the Heat Pump Off and Call for Help
While most heat pump issues aren’t an emergency, there are a few instances where it’s best to shut off the system and call a professional. This includes when your system cannot reach the set temperature, produces unusual noises or smells, runs constantly with no improvement, or causes sudden spikes in utility bills.
What Homeowners Can Check Safely
Before calling a professional, homeowners can attempt to troubleshoot heat pump issues safely by conforming proper thermostat settings, replacing air filters, and ensuring proper airflow by clearing debris around the outdoor unit and ensuring all vents are open.
Schedule Heat Pump Service Before It Fails Completely
Looking to restore proper function to your heat pump? Trust National Heating and Air Conditioning for professional heat pump inspections and repairs to restore efficiency, control energy costs, and avoid emergency breakdowns. Our team of NATE-certified professionals are standing by for 24/7 emergency service and always offer a 100% satisfaction guarantee.
Contact National Heating and Air Conditioning today to schedule heat pump services in Cincinnati.