BoilerFaultCodes.com

Glow-worm Xtramax HE Fault Codes

Combi Natural Gas 35 kW 2005-2010 Discontinued
GC Number: 47-047-23

Replaced by: Energy Store

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Most common fault codes

F1
Your boiler has tried to light itself several times but has been unable to produce a flame, meaning your heating and hot water will not work.
May be DIY safe · £100-350
F2
Your boiler has stopped working because the fan that removes waste gases is either spinning at the wrong speed or has stopped completely.
Gas Safe engineer required · £250-£450
F3
Your boiler is shutting down because it is getting too hot too quickly, likely due to a water circulation problem.
May be DIY safe · £180-450

All 23 fault codes

Code Severity Plain English
F1 High Your boiler has tried to light itself several times but has been unable to produce a flame, meaning your heating and hot water will not work.
F2 High Your boiler has stopped working because the fan that removes waste gases is either spinning at the wrong speed or has stopped completely.
F3 High Your boiler is shutting down because it is getting too hot too quickly, likely due to a water circulation problem.
F4 High Your boiler started to heat up but the flame went out unexpectedly, causing the system to shut down for safety.
F5 High Your boiler has switched itself off because it has become too hot inside, usually due to a circulation problem or a component failure.
F6 High Your boiler has detected a problem with the sensor that monitors the temperature of the water used to heat your radiators, causing the system to shut down for safety.
F7 High Your boiler is having trouble measuring the temperature of your hot water, which means it cannot safely heat water for your taps.
F8 High Your boiler has detected a problem with the sensor that monitors the temperature of the water coming back from your radiators, preventing the system from heating correctly.
F9 High Your boiler has detected an issue with its internal sensor that monitors water pressure, preventing it from heating up.
F10 High Your boiler has detected that its temperature sensors are incorrectly placed or wired, preventing it from calculating how much heat is being delivered to your home.
F11 High Your boiler's internal computer parts are struggling to talk to each other, preventing the system from starting up.
F12 High Your boiler's main control board has lost connection with the display screen, meaning the system cannot receive instructions and has stopped working.
F13 High Your boiler's main control board has encountered an internal electronic error, meaning the 'brain' of the system can no longer manage the heating and hot water safely.
F14 High Your boiler has detected an internal electrical problem with the component that controls the gas supply, meaning it cannot ignite safely for heating or hot water.
F15 High Your boiler has detected a mechanical issue with the part that controls the flow of gas, preventing it from lighting safely.
F16 High Your boiler thinks it sees a flame before it has even started the ignition process, which is preventing it from running for safety reasons.
F17 High Your boiler is not receiving enough electrical power from your home's supply to operate safely and has shut down as a result.
F18 Medium Your boiler's control panel has stopped communicating with the main computer, meaning you cannot adjust settings or see what the boiler is doing.
F19 High Your boiler has detected that a temperature sensor is disconnected or has failed, which is currently preventing the heating from starting to protect the system from freezing.
F20 High Your boiler's computer components are having trouble communicating with each other because they are running incompatible software versions.
F22 High Your boiler has switched itself off because the water pressure is too low for it to operate safely.
F23 High Your boiler has stopped working because the water isn't moving through the system correctly, which is often caused by air bubbles or a blockage.
F26 High Your boiler has shut down because the water is heating up too quickly or hasn't been able to circulate correctly through the system.

Glow-worm Xtramax HE is discontinued — time for a new one?

Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.

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