Immergas Appliance Repair in Grange

What does the 06 error mean on an Immergas boiler?

The 06 error on an Immergas boiler indicates a domestic hot water probe anomaly. The NTC temperature sensor measuring hot water temperature is reporting incorrect readings or has failed. The boiler may continue to provide heating but hot water production will be affected. 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.

What does the 101 error mean on an Immergas heat pump?

The 101 error on an Immergas heat pump indicates a wiring fault between the control kit and outdoor unit. There is an electrical connection problem preventing proper communication. Switch off the heat pump at the isolator switch. Do not attempt to inspect or repair any wiring yourself. Contact a qualified technician to check the electrical connections between the indoor control unit and outdoor heat pump unit.

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 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 38 error mean on an Immergas boiler?

The 38 error on an Immergas boiler indicates loss of flame signal during operation. The boiler was running but the flame detection system stopped detecting the burner flame. If you smell gas, do not operate any switches, ventilate the area if safe to do so, leave the property immediately, and call the gas emergency service from outside. If there is no gas smell, switch off the boiler at the electrical supply. Wait 30 seconds and attempt one reset. If the error recurs, do not continue resetting. Contact a Gas Safe registered engineer to inspect the flame sensing electrode, ignition system, and gas valve.

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 does the defrost function work on my Immergas heat pump?

The heat pump automatically enters defrost mode when ice builds up on the outdoor unit's evaporator coil. During defrosting, the system reverses briefly to melt the ice, then returns to normal 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.

Does my Immergas boiler have a condensate drain that needs attention?

Yes, all Immergas condensing boilers produce condensate that drains away through a dedicated pipe. The condensate drain trap and pipe should be checked as part of annual servicing to ensure they are clear and draining correctly. A blocked condensate drain can cause the boiler to lock out. During very cold weather, external condensate pipes can freeze. If this happens, the boiler will stop working. Contact a qualified technician for assistance as attempting to thaw frozen pipes incorrectly can cause damage.

Does my Immergas heat pump have antifreeze protection?

Yes, Immergas heat pumps include automatic antifreeze protection that activates when outdoor temperatures drop below freezing. This prevents damage to the system and water circuits.