Immergas Repair Service in Orton Longueville

What does the 25 error mean on an Immergas boiler?

The 25 error on an Immergas boiler indicates a block due to flue gas temperature gradient intervention. The boiler has detected a rapid increase in flue gas temperature, which may indicate a blocked pump, insufficient water in the heat exchanger, or other circulation problems. Switch off the boiler at the electrical supply. Allow the boiler to cool down completely for a minimum of 60 minutes. Check that all radiator valves are open and system pressure is correct. Press the reset button once after cooling. If the error recurs frequently, contact a qualified technician.

What does the 10 error mean on an Immergas boiler?

The 10 error on an Immergas boiler indicates insufficient system pressure. The water pressure in the central heating system has dropped below the minimum level required for safe operation, typically below 0.8 bar. Check the pressure gauge on the boiler, which should read between 1.0 and 1.5 bar when cold. If pressure is low, locate the filling loop and slowly add water until the gauge reads within the correct range. Close the filling loop valves securely when finished. If you need to repressurise frequently, this indicates a leak in the system requiring professional attention from a qualified technician.

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 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.

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.

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.

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.

What do the symbols on my Immergas boiler display mean?

During normal operation, the display shows a green illumination with symbols indicating boiler status. The display typically shows the current water temperature. A flame symbol indicates the burner is active. A tap symbol relates to domestic hot water functions. A radiator symbol relates to central heating. Error codes appear as numbers or letter-number combinations when faults occur. When on standby, a horizontal segment appears. Consult your specific model manual for detailed symbol meanings as they can vary between models.

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.

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.