Immergas Appliance Repair in Three Bridges

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 31 error mean on an Immergas boiler?

The 31 error on an Immergas boiler indicates loss of communication with the remote control or room thermostat. If using a wireless thermostat, check and replace the batteries. Ensure the thermostat is switched on and set to call for heat. Verify the thermostat is within range of the boiler receiver unit. If using a wired thermostat, check that it is switched on and calling for heat. Switch off the boiler at the electrical supply, wait 30 seconds, and switch back on. If communication is not restored, contact a qualified technician to check wiring and control compatibility.

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.

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 02 error mean on an Immergas boiler?

The 02 error on an Immergas boiler indicates the safety thermostat has activated due to overheating. The boiler has detected excessive internal temperature exceeding 100 degrees Celsius. Switch off the boiler at the electrical supply. Allow the boiler to cool down completely for a minimum of 60 minutes before attempting any reset. Check that all radiator valves are open to ensure adequate water circulation. If the error returns after cooling and reset, contact a qualified technician immediately as repeated overheating can indicate serious internal faults.

What pressure should my Immergas boiler system maintain?

The boiler pressure gauge should read a value between 1.0 and 1.2 bar when the system is cold. This is the optimal operating range for most Immergas boilers.

What temperature should I set for domestic hot water on my Immergas boiler?

For domestic hot water, a temperature setting between 50°C and 60°C is typically comfortable for showers and baths while remaining safe. The boiler allows adjustment through the control panel using the dial or button marked with a tap symbol.

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.

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.

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.