Glow-worm Compact Fault codes & diagnostics

Your boiler has lost the connection to the sensor that measures how hot the water inside the system is, so it has shut down to prevent overheating.

Your boiler has lost the signal from one of its internal temperature sensors, meaning it cannot correctly measure the heat of the water returning to the system and has shut down as a precaution.

Your boiler has stopped working because it cannot correctly read the temperature of the water flowing through the system due to a faulty electrical sensor connection.

Your boiler is unable to read the temperature of the water returning to it because the sensing equipment is malfunctioning or has lost its connection.

Your boiler has detected that it is getting too hot and has automatically switched itself off to prevent any damage or danger.

Your boiler has stopped working because the water pressure inside your heating system has dropped too low.

Your boiler has detected that the water inside it is heating up or moving much faster than expected, so it has shut down to prevent damage.

Your boiler has detected that the water inside is heating up far too quickly, likely due to a lack of water flow, which has triggered an automatic shutdown to prevent damage.

Your boiler has detected a signal suggesting a flame is present when the burner is actually turned off, causing it to shut down for your safety.

Your boiler is failing to light the flame needed to produce heat or hot water, usually because the gas supply is interrupted or the ignition sensor is blocked.

Your boiler is trying to start but the flame keeps going out, so it has shut down to keep you safe.

Your boiler's fan, which clears waste gases safely outside, is not spinning correctly, so your boiler has shut down to keep your home safe.

Your boiler is struggling because it has lost the signal from the sensor that monitors your incoming cold water supply.

Your boiler is having a communication breakdown with its internal control system, preventing it from functioning correctly.

Your boiler's internal computer is experiencing a memory error, meaning it has lost its stored settings and can no longer safely control the heating system.

Your boiler has detected a communication problem between its internal computer and the temperature sensors, meaning it cannot safely regulate its heat.

Your boiler’s internal control board is overheating, so it has safely shut down to prevent permanent damage to its electronic components.

Your boiler has detected an internal communication error between its main computer and the flame detection system, meaning it has safely shut down to prevent unsafe operation.

Your boiler is struggling to keep its internal flame lit, causing it to shut down for safety reasons.

Your boiler's computer has lost its internal configuration settings, preventing it from knowing how to correctly operate your specific system.

Your boiler is unable to read the temperature of the water flowing out of it, so it has shut down to prevent overheating.

Your boiler is struggling to accurately measure the temperature of the water returning to it, so it has stopped working to prevent potential overheating.

Your boiler has detected that the water pressure reading is incorrect, which prevents it from safely igniting to heat your home.

Your boiler is struggling to push water around your heating system, likely because the internal pump is stuck, failing, or there is an issue with the sensor that detects water pressure.

Your boiler has detected that it is getting dangerously hot and has automatically shut itself down to prevent damage.

Your boiler has detected an issue with the drainage of waste water or the safety mechanism that stops exhaust fumes from flowing back into the system.

Your boiler is struggling to get an accurate reading of the water temperature, causing it to shut down because it cannot safely manage the heat output.

Your boiler is confused because its internal thermometers are reporting conflicting temperature readings, leading it to shut down for safety.

Your boiler has detected that two internal temperature sensors have been swapped around during a recent service or repair, preventing it from safely monitoring water flow.

Your boiler has detected an external signal or safety trigger that has forced it to shut down to prevent damage.

Your boiler is failing to light the flame needed to produce heat or hot water.

Your boiler's water circulation system is malfunctioning, meaning the unit cannot move hot water to your radiators or taps.

Your boiler's computer is unable to complete its internal startup check, meaning it cannot safely operate and has shut down to protect the system.