Fairland Refrigerant Flow Noise / Possible Low Charge

Unit operates but makes a gurgling or hissing sound from inside the refrigerant circuit.

Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Low refrigerant charge causing flashing in liquid line, Normal expansion valve operation, Air or non-condensables in system, Partially blocked expansion device

How to Fix / Troubleshooting

Safety: Do not attempt to open the refrigerant circuit yourself.

Steps:

Observe performance: If heating performance is normal and no error codes appear, some mild gurgling can be normal.
Monitor over time: If noise increases and heating performance drops, stop using the heater and call a technician.

Technician tasks:

Check refrigerant pressures, superheat/subcooling, and inspect the electronic expansion valve (EEV) or capillary device.

Repair Difficulty

Hard 4/5

Required Part

Expansion Device (EEV or TXV)

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