Immergas Appliance Repair in Bewbush & North Broadfield

What does the 419 error mean on an Immergas heat pump?

The 419 error on an Immergas heat pump indicates an outdoor unit electronic expansion valve operation error. The EEV controlling refrigerant flow is not operating correctly. Switch off the heat pump at the isolator switch. Do not attempt to reset repeatedly. Contact a qualified technician with F-Gas certification for expansion valve diagnosis. This component is critical for proper refrigerant circuit operation.

What does the 23 error mean on an Immergas boiler?

The 23 error on an Immergas boiler indicates a return temperature probe anomaly. The NTC temperature sensor measuring return water temperature is reporting incorrect readings or has failed. Switch off the boiler at the electrical supply. Wait 30 seconds and switch back on to reset. If the error persists, contact a qualified technician for probe testing and replacement. This sensor is important for efficient boiler operation and protection against overheating.

What does the 16 error mean on an Immergas boiler?

The 16 error on an Immergas boiler indicates a fan anomaly. The combustion fan is not operating correctly due to a mechanical or electrical fault. Switch off the boiler at the electrical supply. Wait 30 seconds and switch back on to reset. Listen for the fan starting when the boiler attempts to fire. If you hear no fan noise or unusual sounds, contact a qualified technician. The fan is essential for safe combustion and flue gas removal, so do not attempt to operate the boiler if the fan is not working correctly.

What does the 36 error mean on an Immergas boiler?

The 36 error on an Immergas boiler indicates IMG Bus communication loss. There is an internal communication failure between components on the boiler control system. Switch off the boiler at the electrical supply. Wait 30 seconds and switch back on to reset. If the error persists, contact a qualified technician to diagnose the internal communication fault. This error typically requires professional inspection of the control boards.

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.

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 is weather compensation on my Immergas heat pump?

Weather compensation automatically adjusts the flow temperature based on outdoor conditions. When it is colder outside, the system increases the water temperature to provide more heat. When it is warmer, the temperature is reduced to save energy. The system uses an outdoor temperature sensor to monitor conditions. This feature improves efficiency by preventing the heat pump from working harder than necessary. The heating curve settings are typically configured by your installer to suit your home.

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.

When does electrical integration (backup heating) activate on my Immergas heat pump?

Electrical integration activates automatically in certain conditions, including during defrost cycles and when outdoor temperatures are very low. The system controller determines when supplementary heating is needed to maintain target temperatures. If the heat pump alone cannot meet the heating demand within a reasonable time, the backup electric resistance provides additional heating capacity.

How can I maximise the efficiency of my Immergas condensing boiler?

To achieve maximum efficiency, lower the flow temperature setting. Condensing boilers operate most efficiently when return water temperatures stay below 55°C, which is the dew point for flue gases. Setting flow temperatures to 60°C or lower typically ensures the boiler operates in full condensing mode, capturing more heat from the flue gases and using less gas. Higher flow temperatures reduce efficiency as the boiler cannot fully condense the water vapour in the exhaust.