A very common issue people find is that their Heat Pump is iced up or freezes over. Since there is normal “frost” vs abnormal “icing”, it is important to see which issue applies.
It is quite normal for Heat pumps naturally to develop a thin layer of frost in cold weather.
If the system goes into defrost mode periodically and the frost melts on its own, everything is working properly. Defrost cycles generally last five to fifteen minutes or so at intervals of one to two hours per day.
However, If the entire outdoor unit is encased in ice, or the ice doesn’t melt after a defrost cycle, there is something else going on.
If the outdoor unit is heavily iced over you will need to contact a professional. First, it will be necessary switch the system from heat or cool to “fan Only” at the thermostat.
Running it while frozen can damage the compressor and a technician will not be able to run diagnostics on a frozen system.
Ice buildup can start with restricted airflow. Check your outdoor unit for:
- Snow piled against the unit
- Leaves, debris, or vegetation
- Blocked or clogged coils
Ensure the unit has a minimum of two to three feet of breathing room on all sides.
A clogged filter reduces airflow and can cause the outdoor coil to freeze. Replace air filters if
- They look dirty or have noticeable debris or discoloration
- It’s been more than one to three months
- Airflow feels weak
Keeping up with regular air filter changes can help prevent freeze ups or other problems with your HVAC system.
If you use tools to break ice can puncture the coil or damage the coil’s fins. This can lead to very expensive repairs or replacements.
If you need to help it thaw:
- Turn the system to Emergency Heat (if available) or Fan Only setting on the thermostat
- Let the outdoor unit sit off while the ice melts naturally
If you have blockages or poor drainage, it can cause water to refreeze around the base of the unit.
The things to look for:
- Ice forming at the base of the unit
- Blocked drain holes
- Water pooling under the unit
If your heat pump isn’t defrosting on its own, the issue could be:
- A faulty defrost sensor
- A stuck reversing valve
- A malfunctioning control board
- Low refrigerant (requires a licensed tech)
These aren’t do-it-yourself repairs, but noticing the symptoms helps a technician diagnose faster. It is time to contact an HVAC certified technician.
If you have ice that covers the entire unit and
- The unit won’t enter defrost mode
- Ice returns shortly after thawing
- You suspect low refrigerant
- You hear unusual noises during operation
A frozen heat pump often signals a deeper issue that needs proper diagnosis.
Always use licensed, certified technicians when you need your HVAC equipment diagnosed, serviced or repaired. Air Doctor Heating and Air is here to help, Contact Us, Call or Text us at 301-799-7200
Whether you require installation, repair, or maintenance, our technicians will assist you with top-quality service at any time of the day or night. Take comfort in knowing your indoor air quality is the best it can be with MOE heating & cooling services Ontario's solution for heating, air conditioning, and ventilation that’s cooler than the rest.
Contact us to schedule a visit. Our qualified team of technicians, are always ready to help you and guide you for heating and cooling issues. Weather you want to replace an old furnace or install a brand new air conditioner, we are here to help you. Our main office is at Kitchener but we can service most of Ontario's cities
Source link
