BoilerFaultCodes.com

Glow-worm Xtrafast 96 120 Fault Codes

Combi Natural Gas 35-37 kW 2000-2005 Discontinued
GC Number: 47-047-15

This boiler uses LED flash patterns

Count the flashes in one repeating group before the pause. That number is your fault code. Do not reset until you have noted it. How to read fault codes →

Most common fault codes

0 bar
Your boiler has lost its water pressure, which means it has stopped running to protect the internal components from damage.
May be DIY safe · £0-120
02
Your boiler has stopped working because the fan system cannot properly clear waste gases or bring in fresh air to burn fuel safely.
Gas Safe engineer required · £120-280
04
Your boiler is failing to light the flame needed to heat your water and radiators.
May be DIY safe · £100-280

All 28 fault codes

Code Severity Plain English
00 Low Your boiler is operating normally and there are currently no faults detected within the system.
0 bar High Your boiler has lost its water pressure, which means it has stopped running to protect the internal components from damage.
02 High Your boiler has stopped working because the fan system cannot properly clear waste gases or bring in fresh air to burn fuel safely.
04 High Your boiler is failing to light the flame needed to heat your water and radiators.
05 High Your boiler has got too hot and has shut itself down as a safety precaution to prevent damage.
06 High Your boiler has detected a problem with the internal sensor that monitors the temperature of your heating water, meaning the system cannot run safely.
07 Medium Your boiler has stopped providing hot water because the internal sensor responsible for measuring water temperature has either failed or has a loose connection.
08 High Your boiler has lost its ability to monitor the temperature of the stored hot water, meaning it cannot heat your water reliably or safely.
09 High Your boiler's internal sensor is struggling to accurately read the water pressure, which prevents the system from operating safely.
10 High Your boiler has detected that the fan, which safely removes waste gases from the appliance, is not spinning correctly or has lost communication with the main control board.
11 High Your boiler has stopped working because the internal pump that moves water around your system has become stuck or blocked.
12 High Your boiler's control panel and its internal computer are having trouble communicating with each other, preventing the unit from starting.
13 High Your boiler's internal computer has developed a fault and can no longer control the system safely.
14 High Your boiler has shut down because a sensor has detected that it is getting far too hot, likely due to a circulation problem.
15 High Your boiler is unable to correctly control the supply of gas it needs to create a flame, causing the system to shut down for safety.
20 High Your boiler's internal computer parts are struggling to talk to each other, which prevents the system from starting up normally.
F0 High Your boiler has stopped working because the water pressure is too low for the system to run safely.
F1 High Your boiler has stopped working because it cannot light a flame, which is usually caused by a temporary interruption in the gas supply or a component failure.
F2 High Your boiler has detected a problem with the sensor that monitors the temperature of the water leaving the unit, causing it to shut down to prevent overheating.
F3 High Your boiler has switched itself off because it has detected it is getting too hot, likely due to a blockage or a pump that isn't circulating water properly.
F4 High Your boiler has detected an issue with the sensor that monitors hot water temperature, meaning it cannot safely heat water for your taps.
F5 High Your boiler has switched itself off because it has become too hot inside, likely due to a circulation issue or a temporary blockage.
F6 Low Your boiler is having trouble communicating with the weather sensor or temperature probe located outside your home.
F7 Medium Your boiler has detected a problem with the temperature sensor in its hot water storage tank, which means it may struggle to heat your water correctly.
F8 High Your boiler is struggling to circulate water quickly enough through your pipes, which is causing it to stop to prevent overheating.
F9 High Your boiler has detected an issue with how it monitors water levels, meaning it cannot confirm there is enough water to safely provide heating or hot water.
Flashing warning High Your boiler has detected that the water pressure in the system is too low to run safely and has stopped working as a result.
Pictogram of a spark High Your boiler is failing to light because it isn't receiving a gas supply or cannot detect a flame.

Glow-worm Xtrafast 96 120 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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