BoilerFaultCodes.com

Glow-worm Micron 30ff Fault Codes

Regular Natural Gas 8.8 kW 10/1997-2004 Discontinued
GC Number: 41-313-25

Replaced by: Flexicom hx

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

Burner On neon off
Your boiler's burner stays lit even when it should turn off, meaning it isn't responding to your thermostat or timer settings.
Gas Safe engineer required · £120-350
Fast Flashing (8Hz)
Your boiler has detected an internal electrical error or a component failure during its startup sequence that is preventing it from firing up.
Gas Safe engineer required · £180-450
Illuminated reset light
Your boiler has switched itself off because it has reached an unsafe temperature and needs to be cooled down and reset.
May be DIY safe · £100-280

All 46 fault codes

Code Severity Plain English
Burner Lit LED Low Your boiler is working exactly as it should and is currently heating the water for your radiators or taps.
Burner On Neon Low Your boiler is operating normally and is currently heating the water for your radiators or hot water tank.
Burner On neon off Emergency Your boiler's burner stays lit even when it should turn off, meaning it isn't responding to your thermostat or timer settings.
Fast Flashing (8Hz) High Your boiler has detected an internal electrical error or a component failure during its startup sequence that is preventing it from firing up.
Illuminated reset light High Your boiler has switched itself off because it has reached an unsafe temperature and needs to be cooled down and reset.
LED 1 (RESET) Constant Light High Your boiler has failed to light after several attempts and has locked itself out for safety.
LED 1 (RESET) Fast Flashing (8Hz), LED 2 (BURNER LIT) Fast Flashing (8Hz) [Alternating] High Your boiler's computer brain has become confused during its internal startup check and has stopped working as a safety precaution.
LED 1 (RESET) Fast Flashing (8Hz), LED 2 (BURNER LIT) Fast Flashing (8Hz) [Simultaneous] High Your boiler has detected an issue with its internal temperature sensors, preventing it from heating up for safety reasons.
LED 1 (RESET) Fast Flashing (8Hz), LED 2 (BURNER LIT) Fast Flashing (8Hz) Simultaneous High Your boiler has detected a sensor error that prevents it from firing up safely, meaning your heating and hot water will not work until it is reset or repaired.
LED 1 (RESET) Fast Flashing (8Hz), LED 2 (BURNER LIT) OFF High Your boiler's computer has encountered an internal logic error and has stopped working for safety.
LED 1 (RESET) OFF, LED 2 (BURNER LIT) OFF High Your boiler appears to have lost power or has suffered an internal electronics failure, meaning it cannot start up to provide heat.
LED 1 (RESET) OFF, LED 2 (BURNER LIT) ON Low Your boiler is operating normally and currently firing to provide heating or hot water as requested.
LED 1 (RESET) OFF, LED 2 (BURNER LIT) Slow Flashing (2Hz) High Your boiler has detected an internal electrical or operational fault that is preventing it from firing up normally.
LED 1 (RESET) ON, LED 2 (BURNER LIT) Fast Flashing (8Hz) High Your boiler has tried to light several times but failed to start, so it has locked itself out for safety.
LED 1 (RESET) ON, LED 2 (BURNER LIT) Fast Flashing (8Hz) [Simultaneous] High Your boiler is trying to start up but is detecting a problem with how it vents waste gases, causing it to shut down for safety.
LED 1 (RESET) ON, LED 2 (BURNER LIT) OFF High Your boiler has stopped trying to light for safety reasons and needs a manual reset to attempt to start again.
LED 1 (RESET) ON, LED 2 (BURNER LIT) ON High Your boiler’s internal control board has likely encountered an electrical malfunction, meaning the system cannot safely start or manage the heating process.
LED 1 (RESET) Slow Flashing (2Hz), LED 2 (BURNER LIT) Fast Flashing (8Hz) Simultaneous High Your boiler is trying to start up but has detected an issue with the air flow or the internal fan system, preventing it from lighting safely.
LED 1 (RESET) Slow Flashing (2Hz), LED 2 (BURNER LIT) OFF High Your boiler's main internal computer has stopped working correctly and cannot communicate with the system.
LED 1 (RESET) Slow Flashing (2Hz), LED 2 (BURNER LIT) Slow Flashing (2Hz) [Simultaneous] High Your boiler has detected an issue with the electrical wiring where the live and neutral connections are swapped, preventing it from functioning safely.
LED 1 (RESET) Slow Flashing (2Hz), LED 2 (BURNER LIT) Slow Flashing (2Hz) Alternating High Your boiler's internal computer has become confused during its startup sequence and has stopped working for safety.
LED 1 (RESET) Slow Flashing (2Hz), LED 2 (BURNER LIT) Slow Flashing (2Hz) Simultaneous High Your boiler has detected that the electrical wiring coming into the unit is connected the wrong way around, preventing it from starting up for safety reasons.
LED 1 & 2 Alternating Fast Flashing (8Hz) High Your boiler's internal computer brain has encountered a processing error and can no longer control the heating safely.
LED 1 & 2 Alternating Slow Flashing (2Hz) High Your boiler's internal computer has encountered a software logic error and has stopped working to prevent any further issues.
LED 1 & 2 Simultaneous Fast Flashing (8Hz) High Your boiler has detected a sensor error that prevents it from firing up, meaning your heating and hot water will not work until it is fixed.
LED 1 & 2 Simultaneous Slow Flashing (2Hz) Emergency Your boiler has detected an electrical wiring error where the power supply wires are likely swapped or there is a serious grounding issue.
LED 1 Fast Flashing (8Hz) High Your boiler’s internal control board has developed a critical electronic fault and can no longer manage the heating process safely.
LED 1 Slow Flashing (2Hz) High Your boiler has entered a safety lockout mode because it failed to light or stay on properly after multiple attempts.
LED 2 Burner Lit Low Your boiler is operating normally and the central burner is currently ignited and heating your water.
LED 2 Fast Flashing (8Hz) High Your boiler has detected an internal electrical or computer error and has stopped working for safety.
NEON1 Low Your boiler is receiving electrical power and is in standby mode or waiting for a signal to heat up.
NEON2 High Your boiler is receiving a request to turn on the heating or hot water, but it has not yet successfully fired the burner.
NEON3 High Your boiler has stopped working because it thinks the fan is spinning but it isn't receiving the correct signal to proceed with lighting the burner.
NEON4 Low Your boiler is operating normally and the burner has successfully ignited to provide heating or hot water.
NEON5 High Your boiler has shut down because it has detected it is getting too hot, usually caused by a blockage or a pump failure.
NEON6 High Your boiler is failing to light or stay lit, meaning it cannot heat your home or water.
Reset LED is lit High Your boiler has sensed it is getting too hot and has shut itself down as a safety precaution.
Reset light High Your boiler has switched itself off because it got too hot, likely triggered by a safety sensor to prevent damage.
Reset light (illuminated) High Your boiler has become too hot and has automatically shut down to protect itself, usually because the water inside isn't circulating properly.
Reset Light / Overheat High Your boiler has switched itself off because it has reached an unsafe temperature, usually caused by a circulation issue or a temporary blockage.
RESET ON / BURNER LIT flashing fast (8 Hz) High Your boiler has failed to ignite properly multiple times and has locked itself out for safety.
RESET ON, BURNER LIT flashing fast (8 Hz) High Your boiler has tried to light several times but failed, causing the system to shut down for safety.
Reset permanently ON and Burner Lit flashing fast (8 Hz) High Your boiler is failing to light the gas flame properly and has locked itself out for safety.
Sequence Error High Your boiler has become confused while trying to start up and has stopped working for safety reasons.
Slow Flashing (2Hz) High Your boiler has failed to ignite and has locked itself out for safety, meaning you currently have no heating or hot water.
Software Error High Your boiler's internal computer brain has encountered a glitch or failure and is struggling to run its operating system.

Glow-worm Micron 30ff 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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