Heat pumps operate differently from furnaces, and their behavior can change as outdoor conditions change. That can make it difficult to tell whether something you notice during cold weather is normal operation or a sign that the system needs attention.
If your home is not staying comfortable, start with a few basic checks before trying to diagnose the equipment itself.
Check the Thermostat and Heat Pump Settings
Begin at the thermostat.
Make sure the system is set to heating mode and that the temperature setting is appropriate for the home.
If the thermostat has been changed recently, confirm that an unexpected setting is not responsible for the comfort problem.
Avoid making repeated large thermostat adjustments in an attempt to force the system to heat faster. If the heat pump is running but the home is not maintaining comfort, there may be another issue that needs attention.
Check the Air Filter and Indoor Airflow
Restricted airflow can interfere with heating performance.
Check the system’s accessible air filter and clean or replace it according to the manufacturer’s instructions.
Also make sure registers and return-air areas are not obstructed by furniture or other objects.
If airflow from the system is noticeably weaker than usual even after these basic checks, make note of the symptom and consider having the system evaluated.
Check the Outdoor Heat Pump
A heat pump needs airflow through its outdoor equipment even during the heating season.
Look for leaves, snow, or other obvious obstructions around the unit. Keep the area clear without opening equipment panels or attempting to service the outdoor unit yourself.
If the equipment is covered in substantial ice rather than a light frost, or ice remains instead of clearing during normal operation, the system may need professional attention.
Do not chip or strike ice off the outdoor coil. The equipment can be damaged by improper attempts to remove it.
Is Frost on a Heat Pump Normal in Winter?
Some frost on the outdoor coil can occur during cold-weather heating.
A heat pump can periodically enter a defrost cycle to remove frost that has accumulated on the outdoor coil. During that process, you may notice a temporary change in how the system operates.
That is different from an outdoor unit remaining heavily iced over or failing to return to normal heating operation.
If ice continues to build, the home is losing comfort, or the system does not appear to recover normally, an HVAC technician can determine whether there is a problem with the equipment or its defrost operation.
When Poor Heating May Signal a Problem
Cold weather alone does not explain every heat-pump comfort problem.
If the system is unable to maintain comfortable conditions, possible causes can include restricted airflow, a control or sensor problem, an issue with the defrost system, a refrigerant-system problem, an electrical or mechanical component issue, or another condition affecting system performance.
Those problems can produce overlapping symptoms, which makes professional diagnosis important.
When Should You Request Heat Pump Service?
Consider scheduling an evaluation if:
- The home is not maintaining the expected temperature.
- Airflow is unusually weak.
- The system repeatedly behaves differently than normal.
- Heavy ice remains on the outdoor unit.
- The system does not appear to recover after a defrost cycle.
- Heating performance has noticeably declined.
- The same problem continues after checking the thermostat and filter.
A technician can inspect the system and determine whether maintenance, repair, or another solution is appropriate.
Heat Pump Service From UG Nasons
If your heat pump is struggling to keep your home comfortable, UG Nasons can evaluate the system and help determine what requires attention.
Learn more about heat pump heating and cooling services.
UG Nasons serves Newport County, Washington County, Bristol County, East Greenwich, and West Greenwich. Contact UG Nasons to schedule an evaluation if your heat pump is not heating your home as expected.