Immergas Appliance Repair in Reddish North

What does the 251 error mean on an Immergas heat pump?

The 251 error on an Immergas heat pump indicates a discharge temperature sensor malfunction. The sensor measuring compressor discharge temperature is faulty or disconnected. Switch off the heat pump at the isolator switch for five minutes. Switch back on and monitor operation. If the error persists, contact a qualified technician for sensor testing and replacement.

What does the 320 error mean on an Immergas heat pump?

The 320 error on an Immergas heat pump indicates an OLP sensor error. The overload protection sensor on the compressor has detected a fault. Switch off the heat pump at the isolator switch. Do not attempt to reset repeatedly. Contact a qualified technician with F-Gas certification for compressor and sensor inspection. This protection system prevents compressor damage from electrical overload.

What does the 221 error mean on an Immergas heat pump?

The 221 error on an Immergas heat pump indicates an outdoor unit temperature sensor malfunction. The temperature sensor on the outdoor unit is reporting incorrect readings or has failed. Switch off the heat pump at the isolator switch for five minutes. Switch back on and monitor for the error. If the error persists, contact a qualified technician for sensor testing and replacement.

What does the 203 error mean on an Immergas heat pump?

The 203 error on an Immergas heat pump indicates a communication error between the inverter and main control board lasting more than six minutes. Switch off the heat pump at the isolator switch for five minutes. Switch back on and monitor for the error. If the error persists, contact a qualified technician. This fault may require inverter board inspection or replacement.

What does the 403 error mean on an Immergas heat pump?

The 403 error on an Immergas heat pump indicates ice has been detected on the compressor during cooling operation. This is a protective function to prevent compressor damage. Allow the unit to complete its defrost cycle. Check that the outdoor unit is not obstructed by debris, leaves, or snow. Ensure adequate clearance around the outdoor unit for airflow. If the error persists or recurs frequently, contact a qualified technician with F-Gas certification as this may indicate refrigerant charge issues.

Why are some radiators not heating up when my Immergas boiler is running?

If some radiators remain cold while the boiler is running, trapped air may be the cause. Bleed each cold radiator using a radiator key by opening the bleed valve until water flows steadily, then close it. Ensure all radiator valves are open. Check that the system pressure is between 1.0 and 1.5 bar after bleeding. If radiators remain cold after bleeding, or if multiple radiators are affected, contact a qualified technician as there may be a circulation pump fault or system blockage.

Does my Immergas boiler have frost protection?

Yes, Immergas boilers include an antifreeze function. If the system water temperature inside the boiler falls below approximately 4°C, the boiler automatically starts both the pump and burner to heat the water to a safe temperature. This protection only functions when the boiler is connected to the electrical supply and operating normally, not in a fault or block state. During extended absences in cold weather, consider draining the system or adding appropriate antifreeze products to the heating water.

How often should my Immergas boiler be serviced?

The heating system should be serviced at least once a year. Additionally, a combustion test (flue test) should be carried out at least once every two years to ensure optimal safety, performance and operation.

What periodic maintenance does my Immergas heat pump need?

Periodic maintenance includes visually checking for water leaks or oxidation on connections, verifying that safety devices have not been tampered with, and ensuring the outdoor unit remains free of debris. Check that drainage for condensate and defrost water is clear.

What should I do if my Immergas heat pump outdoor unit is making unusual noises?

Some noise during operation is normal, particularly during defrost cycles when the reversing valve operates. However, unusual grinding, rattling, or continuous loud noises may indicate a fault requiring professional attention.