53 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
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The GC number on your boiler's data badge identifies the exact appliance and production years, as recorded in the UK Product Characteristics Database.
| GC number | Appliance (register name) | Produced |
|---|---|---|
| 47-267-73 | BLUEHELIX TECH RRT 34C | 2018–present |
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Your boiler is failing to light the flame needed to heat your home's water and radiators.
Your boiler has detected a flame even though it is not supposed to be running, which is a safety lockout to prevent potential gas build-up.
Your boiler has detected an issue with the internal fan that pushes exhaust gases out of the flue, so it has safely shut down to prevent unsafe operation.
Your boiler is correctly attempting to start, but it is failing to light the internal gas flame required to produce heat or hot water.
Your boiler has detected that the exhaust gases leaving the unit are getting too hot, so it has shut itself down to prevent damage.
Your boiler has detected that it is running much hotter than it should be and has automatically switched itself off to prevent internal damage.
Your boiler has detected that the water inside the system has become dangerously hot and has shut itself down to prevent damage.
Your boiler is struggling to detect the flow of water, which means it will stop heating your water and radiators to prevent damage.
Your boiler has detected an issue with the sensor that monitors the temperature of the gases leaving your flue, causing it to shut down for safety.
Your boiler has detected that it cannot safely push exhaust gases outside, so it has shut down to prevent fumes from building up in your home.
Your boiler has detected that the internal heat exchanger is getting too hot, so it has safely shut itself down to prevent any damage.
Your boiler's electronic control system has detected that its internal settings have become corrupted or are incompatible, preventing it from operating safely.
Your boiler has detected that the main heat exchanger is overheating, likely due to a lack of water flow or an air blockage, causing it to shut down for protection.
Your boiler has detected that the main heat exchanger is getting too hot, likely due to poor water circulation or a buildup of debris, and has shut down to prevent internal damage.
Your boiler has detected that the temperature of the water flowing out is rising too quickly compared to the return, suggesting a potential restriction or overheating issue within the system.
Your boiler's internal computer is experiencing a communication error, which has caused the system to stop working to prevent further damage.
Your boiler's main control computer is experiencing an internal electronic fault and cannot communicate properly, resulting in a system shutdown.
Your boiler's internal computer is struggling to correctly adjust its gas and air mixture to ensure it burns fuel efficiently.
Your boiler's internal electronic control panel is reporting an internal communication error and cannot safely operate the system.
Your boiler has detected an internal communication error with its main control unit, meaning it is unable to safely manage its operations and has shut down to protect itself.
Your boiler's computer is having a communication problem with a specific plug-in configuration component, which means it cannot safely run.
Your boiler is temporarily waiting to restart as part of its normal safety routine to prevent overheating.
Your boiler is currently taking a temporary break to protect its internal components from overheating, which is a normal safety feature after the system has reached its operating limit.
Your boiler has detected that the exhaust gases leaving the system are dangerously hot, so it has shut itself down to prevent damage or safety hazards.
Your boiler has detected that it is running much hotter than it should be and has automatically switched itself off to prevent internal damage.
Your boiler has detected that it is running too hot and has automatically switched itself off to prevent damage or safety issues.
Your boiler is struggling to detect the flow of water, which means it cannot tell when you have turned on a hot tap or require heating.
Your boiler is struggling to detect the temperature of the water used for your taps and shower, so it has stopped heating your hot water to prevent it from getting too hot.
Your boiler has detected a communication issue with the sensor that monitors the temperature of the gases leaving your flue, meaning the boiler has safely shut down to prevent incorrect operation.
Your boiler is overheating because it cannot safely vent the hot gases produced during the heating process.
Your boiler's internal computer has encountered a configuration error and cannot safely operate until the settings are corrected.
The internal computer in your boiler has encountered a configuration error and cannot safely operate your heating or hot water.
Your boiler's computer has encountered a configuration error and cannot operate until its internal settings are correctly restored.
Your boiler is receiving less electrical power than it needs to operate safely and reliably, likely due to an issue with your home's power supply rather than a fault within the boiler itself.
Your boiler has stopped working because the water pressure inside the heating system has dropped too low.
Your boiler has lost connection to the weather sensor outside and is defaulting to a standard internal setting to keep your home warm.
Your boiler's computer has lost its internal settings, meaning it no longer knows how to operate correctly and has shut itself down as a precaution.
Your boiler has detected an inconsistency in its temperature readings, causing it to shut down to prevent potential overheating.
Your boiler has detected that the main heat exchanger is getting too hot, so it has shut itself down to prevent any internal damage.
Your boiler's internal computer has lost its programmed settings and currently cannot communicate correctly with the system to operate.
Your boiler's computer has lost its internal configuration settings, meaning it has forgotten how to safely control your heating and hot water.
The boiler's internal computer is experiencing a configuration error and cannot process its basic operating instructions.
Your boiler is having trouble communicating with its own internal combustion settings, meaning it cannot safely ignite or heat your home.
Your boiler's internal computer is experiencing a software or configuration error that is preventing it from running safely.
Your boiler has lost the correct settings for its internal combustion process and needs to be professionally reconfigured to run safely and efficiently.
Your boiler is failing to detect a flame because the sensor responsible for lighting or monitoring the burner is damaged or misaligned.
Your boiler has detected an internal communication error with its main control computer, preventing it from operating safely.
Your boiler has detected an internal error within its main control computer, preventing it from operating safely.
Your boiler’s internal computer system has encountered a software error and cannot start up properly, meaning the unit will not operate.
Your boiler's electronic control board is struggling to communicate with a memory chip, which prevents it from starting up reliably.
Your boiler's electronic control unit is failing to communicate properly, which has caused it to stop working for your own safety.
Your boiler's computer has encountered a memory error while reading its internal configuration software, which is preventing it from starting up correctly.
Your boiler has detected an internal issue with its combustion control system and has safely shut down to prevent incorrect operation.
Not faults — these are normal operating states. Tap to expand.
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BoilerFaultCodes