Why doesn't the air source heat pump heat?

There can be many reasons why an air source heat pump does not heat, but often the cause is a lack of refrigerant in the device, which requires a professional visit to check the amount of refrigerant in the device, locate and prevent any leaks, and refill the device. See below for instructions on what to do if your air source heat pump does not heat properly and other possible reasons, or book a service visit directly from the link below.

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1. Device settings

The first thing to check if your air source heat pump is not heating is the device settings. Make sure that the heating mode is on on the remote control and that the air source heat pump is powered. The heating mode is identified on most air source heat pumps by an image of the sun or a flame. Also check on the remote control that the temperature setting is high enough. Avoid using automatic mode and make sure that the fan speed is high enough to spread the heat effectively throughout the room.

Go through these:

• Make sure that the heat pump's power supply is on, i.e. the plug is in the wall or the safety switch is in the ON position.

• Check with the electrical company that the heat pump's power supply fuse, circuit breaker, or residual current device has not tripped.

• Turn off the equipment using the remote control and check if the indoor unit shuts down normally.

• Replace the batteries in the remote control if the indoor unit does not respond to the remote control command or the remote control display is dim.

• Restart the equipment using the remote control and observe during the startup process.

2. Low refrigerant

Low refrigerant is a common reason why an air source heat pump does not blow warm air. An air source heat pump needs refrigerant to function, and if the amount is too low, the device will not be able to heat the air effectively. Low refrigerant can be caused by a leak, which must be located and repaired. This task requires the help of a professional service technician, as handling refrigerant requires specialized knowledge and equipment.

Solution: Troubleshooting visit and refrigerant charge check by our professional

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3. Dirty indoor unit

Dirty filters on the indoor unit, especially the fins behind them, can block airflow and reduce the efficiency of the unit. The filters should be cleaned regularly, preferably every 2-3 months, to ensure optimal performance. It is also important to clean other parts of the indoor unit to ensure airflow is not blocked and heating is efficient.

Solution: Fresh Wash air source heat pump maintenance Read more and book an appointment >

4. Outdoor temperature

The heating capacity of an air source heat pump may be reduced if the outdoor temperature is very low. This is because the device is unable to extract enough heat from the outdoor air. Make sure that the outdoor unit receives enough air and that there are no obstacles around it that would hinder air circulation. In addition, the outdoor unit should be cleaned regularly of leaves and other debris.

5. Age and condition of the device

Older air source heat pumps can lose their efficiency over time. Regular maintenance of the device is key to maintaining its performance. It is recommended that the air source heat pump be serviced by a professional every 2-3 years. Hesatek offers comprehensive maintenance services to ensure a long service life and optimal operation of the device.

6. Other fault

Other faults, such as those in the indoor unit, may prevent the unit from operating efficiently. The fan or other components may be faulty or worn out. A thorough inspection and maintenance by a professional can resolve these issues and restore the unit to normal operation.

Checklist – Air source heat pump does not heat

• Power supply: Make sure that the heat pump's power supply is turned on.

• Remote control: Replace the batteries and check the remote control operation.

• Device settings: Make sure the heating mode is on and the target temperature is high enough.

• Error codes: Monitor the indoor unit display or indicator lights for error codes.

• Filters: Check that the filters on the indoor unit are clean and that air can circulate unhindered.

• Outdoor unit: Make sure the outdoor unit is free of leaves or other debris and is not frozen.

• Remote control: Make sure that no timers have been set on the remote control or via remote control that interfere with heating operation.

• Monitoring: Wait quietly and observe the equipment. Check the operation of the outdoor unit, such as the noise of the fan and compressor.

Summary

Air source heat pump heating problems can be caused by a number of reasons, such as device settings, low refrigerant, faulty indoor or outdoor unit components, dirty indoor unit, outdoor air temperature, or the age and condition of the device. Many of these problems can be solved by checking and maintaining the device regularly. However, if the device still does not heat, it is recommended to contact a specialist.

Hesatek offers expert help with all problems related to air source heat pumps. Book maintenance in time and ensure that your air source heat pump works flawlessly throughout the winter. For more information and to order maintenance, visit Hesatek's website.

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