BoilerFaultCodes
The most common Intergas faults
Your boiler has switched itself off because the water inside the system has become too hot.
Why it happens: This fault occurs when the water inside the boiler exceeds a safe temperature limit because it isn't moving away from the heat exchanger properly. The most common reasons are a pump failure, a blockage caused by sludge and debris in the pipework, or air trapped within the system preventing flow.
Check that at least two or three radiator valves are fully open to allow water to flow.Ensure there are no obstructions or trapped air by bleeding your radiators.Check your boiler pressure gauge and top it up to 1.5 bar if it is too low.
Your boiler is trying to start up but cannot successfully light the gas to create a flame.
Why it happens: This fault occurs when the boiler's internal sensor fails to detect a flame after several attempts to ignite the gas. The most common reasons are a lack of gas supply to the unit, a worn-out ignition spark, or a buildup of debris on the internal probes that monitor the combustion process.
Check that your gas emergency control valve is in the 'on' positionIf you have a prepaid meter, ensure you have active credit and the meter is not lockedReset the boiler by pressing the reset button to see if it was a temporary glitch
Your boiler is failing to detect a flame after it tries to ignite, meaning it will not stay lit to provide heating or hot water.
Why it happens: This fault occurs when the boiler's internal sensor fails to detect a steady flame during the start-up sequence, forcing the system to shut down for safety. The most common reasons are a worn-out sensor probe that can no longer 'see' the flame, a faulty ignition cable, or an issue with the gas valve not delivering the correct amount of fuel.
Check if other gas appliances, like a cooker, are working to ensure gas is being supplied to the property.Ensure your gas meter has credit if you use a pre-payment meter.Try resetting the boiler by pressing the 'Reset' button on the display panel.
Your boiler has shut down because it cannot breathe properly, likely due to a blockage in the pipes leading to the outside of your home.
Why it happens: This fault occurs when the boiler's internal sensors detect that it cannot safely pull in fresh air or expel exhaust gases. The most common reasons include an external blockage in the flue pipe, such as a bird's nest or debris, or a mechanical failure of the fan that prevents air from moving through the system.
Check the external flue terminal on your outside wall for obstructions like bird nests, leaves, or debris.During freezing weather, check if the flue outlet is blocked by ice or snow and gently clear it.Reset the boiler by pressing the reset button once any external obstructions are removed.
Your boiler is trying to light but cannot spark or maintain a flame, meaning you have no heating or hot water.
Why it happens: This fault occurs when the boiler's internal computer tries to start the burner multiple times but cannot detect a successful flame. The most common reason is a problem with the gas supply or a worn-out ignition spark, but it can also be triggered by a build-up of debris on the internal sensors that monitor the fire.
Check that your gas emergency control valve is in the 'on' position.Verify if other gas appliances, such as a hob, are working to confirm gas supply.If you have a pre-payment meter, ensure you have sufficient credit.Press the 'Reset' button on the boiler control panel for 2 seconds.
Your boiler has shut down because the water inside it has become too hot, causing it to overheat for safety.
Why it happens: This fault occurs when water cannot circulate through the boiler quickly enough to carry heat away, causing the internal temperature to reach a dangerous level. The most common reasons are a failed pump that isn't pushing water around, a blockage in the pipework, or air trapped within the heat exchanger. It acts as a safety 'trip' to prevent the appliance from being damaged by extreme heat.
Check that all radiator valves are fully open to allow water to flow.Ensure your system pressure is between 1.0 and 1.5 bar on the gauge.Press the 'reset' button on the boiler control panel once the unit has cooled down.
Your boiler has detected that the water pressure is too low for it to run safely, or there is a blockage preventing water from circulating.
Why it happens: This fault occurs when the boiler detects that there isn't enough water pressure in the system to operate safely, or the water isn't moving through the unit correctly. The most common reason is a gradual loss of pressure through small leaks or after bleeding your radiators, but it can also be triggered by a faulty pump that isn't pushing water around the circuit.
Check the pressure gauge on your boiler or under the sink; it should be between 1.0 and 1.5 bar.Locate the filling loop (a flexible silver hose) and slowly open the valves until the pressure reaches 1.2 bar.Ensure all radiator valves are open and your external pump (if applicable) is running.
Your boiler has stopped working because one of its internal sensors is sending an incorrect signals or has disconnected, preventing it from heating your water safely.
Why it happens: This fault occurs when the boiler's control board loses communication with the sensors that monitor water temperature. It is usually caused by a physical break in the internal wiring or a sensor that has reached the end of its life and is sending unreadable data. Because the boiler can no longer confirm the water is at a safe temperature, it shuts down immediately as a safety precaution.
Full guide for Xtreme / Xclusive F000