When the colder months set in, your heat pump’s ability to seamlessly switch from cooling to heating is essential for home comfort. But what happens when your heat pump refuses to leave cooling mode and fails to warm your home? At Hometown Heating and Air Conditioning, we know how frustrating this can be—we’ve helped locals handle problems with heat pumps for years. Let’s take a closer look at why your heat pump might not be working in heating mode and what you can do about it.
Common Issues You Can Check Yourself
Before you call in the pros, there are a few simple things you can check yourself.
Thermostat Settings
One of the most common and easiest-to-fix issues is incorrect thermostat settings. Double-check that your thermostat is set to “Heat” or “Auto” mode and that the desired temperature is higher than the current indoor temperature. If the thermostat is set incorrectly, your heat pump may continue operating in cooling mode.
Clogged Air Filter
A dirty or clogged air filter can restrict airflow, causing your heat pump to struggle and potentially malfunction. When airflow is limited, the system may fail to switch modes effectively. Inspect your air filter and replace it if it’s dirty. Regularly changing your filter every 1–3 months helps prevent these issues.
Tripped Circuit Breaker
Heat pumps rely on electricity to operate. If a circuit breaker has tripped, it could disrupt the system’s ability to heat. Check your electrical panel to see if the breaker for your heat pump has been tripped.
When It’s Time to Call a Professional
If your heat pump still won’t switch to heating mode after addressing the basics, the problem is likely more complex.
Broken Reversing Valve
The reversing valve is a key component that allows your heat pump to switch between heating and cooling. If the valve is stuck or damaged, your system will remain in cooling mode. Replacing or repairing a reversing valve is not a DIY job; it requires a trained HVAC technician to handle it properly.
Low Refrigerant Levels
Your heat pump needs a specific charge of refrigerant to transfer heat effectively. If there’s a refrigerant leak or the levels are too low, your system may struggle to heat your home. Signs of low refrigerant include reduced heating performance and ice buildup on the outdoor unit. Refrigerant issues must be handled by licensed professionals.
Faulty Thermostat Wiring
Sometimes, the issue isn’t the thermostat itself but the wiring connecting it to your heat pump. Faulty or loose connections can prevent the system from receiving the correct commands. An HVAC technician can inspect the wiring and repair any issues to restore proper communication between the thermostat and heat pump.
Malfunctioning Defrost Control Board
During colder weather, the outdoor unit of your heat pump may accumulate frost, which can impact its performance. The defrost control board is responsible for melting this frost. If the board malfunctions, frost may build up excessively, preventing the system from operating in heating mode.
If your heat pump isn’t working in heating mode, don’t let the cold weather take over your home. The experienced technicians at Hometown Heating and Air Conditioning are here to help. We do everything from heat pump repair to heat pump installation in Walnut Creek.
At Hometown Heating and Air Conditioning, Your Comfort Is Our Business! Call us for all your heat pump needs.