Immergas Appliance Repair in Pound Hill North & Forge Wood

What does the 20 error mean on an Immergas boiler?

The 20 error on an Immergas boiler indicates a parasite flame block. The flame detection system is sensing a flame signal when the boiler should not be firing, which could indicate a leak in the detection circuit or a flame control unit anomaly. 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 and do not attempt to restart. Contact a Gas Safe registered engineer immediately for inspection.

What does the 462 error mean on an Immergas heat pump?

The 462 error on an Immergas heat pump indicates an absorption error or PFC overcurrent fault from the inverter. The power factor correction circuit is detecting excessive current draw. Switch off the heat pump at the isolator switch immediately. Do not attempt to reset. Contact a qualified technician for electrical system diagnosis. This fault may indicate serious electrical problems requiring professional repair.

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 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 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 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.

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.

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.

What operating modes are available on my Immergas heat pump?

Immergas heat pumps support multiple operating modes including central heating, cooling (where applicable), standby, and antifreeze protection. You can cycle through available modes using the Mode button on the control panel.