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  4. Swimming Pool Heat Pump Freezing up...

Swimming Pool Heat Pump Freezing up

A very common question asked by owners who use swimming pool heat pumps for the first time, especially those who live in cold climates. Why is my heat pump covered with ice?


Leomon Technology has more than 20 years of experience in the production of heat pumps. We not only know the cause of this icing, but also how to prevent it from damaging your equipment.


The most common reasons for heat pump freezing are as follows:

1. Insufficient airflow

2. Freezing rain causes icing

3. The drain pipe is blocked

4. Lack of maintenance


What causes the heat pump to freeze?

A thin layer of frost on the heat pump coil is normal, but thick ice accumulation is a sign of operating problems. It will prevent your system from heating and cooling normally, and may cause your heat pump to freeze. Heat pumps generally have an automatic defrost mode to prevent the equipment from freezing during normal operation. HVAC technicians can check to ensure that these controls are operating properly.


One of the main reasons for the freezing of heat pumps is the lack of air flow. If there is not enough airflow, ice will accumulate on the coils and cause the heat pump to freeze.


Airflow restriction can be caused by the following reasons:

1. The filter is clogged

2. Blocked pipes

3. The outdoor unit is blocked by leaves, grass or snow.

4. The supply and return air ducts are not obstructed by furniture, carpets or closed doors.

5. Conditions unrelated to the mechanical integrity of the system can also cause the heat pump to freeze. Freezing rain or leaking drains can freeze the outdoor unit and block airflow.


Other possible causes of heat pump freezing

There are other factors that may hinder the normal operation of the heat pump. These include:

1. Insufficient refrigerant charge

2. Valve operation error

3. Worn motor or fan

4. Your technician should be able to identify and repair other electronic or mechanical problems


How to stop the heat pump from freezing


To prevent your heat pump from freezing, you need to ensure that the air flow is not restricted and the equipment is not blocked. Some tips to prevent this problem include:


1. Regularly clean or replace the air filter

2. Keep the outdoor unit free of debris

3. Check whether the condensed water in the outdoor unit can be freely discharged from the equipment

4. Make sure that the concrete slab below the unit does not settle or move to cause water accumulation in the condensing unit


In addition, heat pumps are most likely to freeze during the coldest part of the day. Therefore, you should avoid running the heat pump late at night and early morning, especially in winter.


Hope this article can help you better understand your heat pump. If you still feel uncomfortable with the ice covering the heat pump, you can always contact Leomon Technology. We will provide professional answers to your situation.


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  • Air Source Heat Pumps
    • Domestic Heat Pumps
    • Commercial Heat Pumps
    • Industrial Heat Pumps
  • Heat Pump Cylinders
  • Air to Water Heat Pumps
  • Swimming Pool Heat Pump
    • Residential Swimming Pool Heat Pump
    • Commercial Swimming Pool Heat Pump
    • Spa Heat Pump
  • Hot Water Heat Pumps
    • Domestic Hot Water Heat Pumps
    • Commercial Hot Water Heat Pumps
  • Underfloor Heating Heat Pumps
  • High Temperature Heat Pumps
  • Cold Climate Heat Pumps
    • Low Temperature Heat Pumps
    • EVI Heat Pumps
  • Geothermal Heat Pump
    • Ground Source Heat Pump
  • DC Inverter Heat Pumps
  • CO2 Heat Pumps

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  • +86 15603721115

    +86 15603721115

    tyler@lnashp.com

    Cihu Technical Area, Maanshan. China

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    +86 15603721115

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    tyler@lnashp.com

    Cihu Technical Area, Maanshan. China

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