Immergas Appliance Repair in Cheadle West & Gatley

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 29 error mean on an Immergas boiler?

The 29 error on an Immergas boiler indicates a flue temperature probe anomaly. The sensor measuring flue gas 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 critical for combustion safety monitoring.

What does the 03 error mean on an Immergas boiler?

The 03 error on an Immergas boiler indicates the flue safety thermostat has activated due to excessive flue gas temperature. This is a critical safety feature detecting potential flue obstruction or combustion problems. Do not attempt to reset or override this safety feature. Do not use the boiler. Ensure the room is well ventilated. Contact a Gas Safe registered engineer immediately as flue problems can lead to carbon monoxide exposure, which is potentially fatal. Do not delay professional inspection.

What does the 463 error mean on an Immergas heat pump?

The 463 error on an Immergas heat pump indicates OLP overheating. The overload protection system has detected excessive temperature. Allow the unit to cool down completely for at least 30 minutes. Check that the outdoor unit has adequate ventilation and airflow is not restricted. Switch off at the isolator, wait five minutes, then restart. If the error persists, contact a qualified technician for diagnosis of the overheating cause.

What does the 554 error mean on an Immergas heat pump?

The 554 error on an Immergas heat pump indicates a coolant leak has been detected in the refrigerant circuit. This is a serious fault requiring immediate professional attention. Switch off the heat pump at the isolator switch immediately. Do not attempt to reset or restart the unit. Contact a qualified technician with F-Gas certification immediately. Refrigerant leaks must be repaired by certified professionals and the system recharged before operation can resume.

How do I switch my Immergas boiler between summer and winter mode?

Use the mode selector on the control panel or remote control to switch between modes. In summer mode, the boiler provides domestic hot water only and central heating is disabled. In winter mode, both domestic hot water and central heating are enabled. If using a CAR remote control, turn the main selector to the desired position. The display will show the current mode. Some models use icons: a sun or umbrella symbol for summer mode and a snowflake symbol for winter mode.

How do I repressurise my Immergas boiler?

Locate the filling loop beneath or near your boiler. Open both valves slowly to allow cold mains water into the system while watching the pressure gauge. When it reaches between 1.0 and 1.2 bar, close both valves securely.

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.

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.

At what temperature should I store hot water to prevent bacteria growth?

If your Immergas system includes a hot water storage cylinder, the water should be stored at a minimum of 60 degrees Celsius to prevent the growth of harmful bacteria including Legionella. Water at taps should reach at least 50 degrees Celsius within one minute of running. Some Immergas systems include an anti-legionella function that periodically raises the stored water temperature automatically. This does not apply to combi boilers which heat water on demand without storage.