40 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
Replaced by: Chaffoteaux PIGMA EVO
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Your boiler has recorded a fault, but this specific code is a generic indicator showing that an error occurred previously rather than describing a specific current problem.
Your boiler has recorded a list of previous errors, which is a history log of minor issues or malfunctions that occurred in the past.
Your boiler is simply protecting itself from freezing by circulating water to keep the system temperature at a safe level.
Your boiler is automatically warming itself up because it has detected very cold temperatures, which is a normal protective feature to prevent pipes from freezing.
Your boiler has detected that it is running too hot and has automatically shut itself down to prevent damage.
Your boiler has failed to light the flame after several attempts and has switched itself off to prevent a gas buildup.
Your boiler has detected that the exhaust gases are becoming dangerously hot, so it has shut itself down to prevent damage or overheating.
Your boiler's internal computer is experiencing a communication error, meaning it has safely shut itself down to prevent unpredictable operation.
Your boiler's main internal computer has encountered a serious internal error and cannot operate safely.
Your boiler's main internal computer is experiencing a critical error, which has caused the system to shut down for safety reasons.
Your boiler is failing to clear combustion gases properly because the internal fan is not operating as it should.
Your boiler has stopped working because the water pressure inside the heating system has dropped too low.
Your boiler is failing to light the flame needed to heat your home's water, so it has stopped working for safety reasons.
Your boiler has detected that temperatures inside are very low and is running its pump to prevent the internal water from freezing.
Your boiler has automatically triggered its frost protection mode because the internal temperature has dropped too low.
Your boiler is struggling because water is not flowing around your heating system properly to distribute warmth.
Your boiler has detected that the water pressure inside the heating system is too low to operate safely.
Your boiler has lost the signal from the sensor that monitors the temperature of your hot water, which means it will likely stop heating your water until the connection is restored.
Your boiler is having trouble sensing the temperature of your hot water supply, which means it will likely stop producing hot water until the faulty sensor is replaced.
Your boiler is struggling to detect the flow of water through the system, meaning it cannot safely turn on to provide your heating or hot water.
Your boiler is unable to read the water flow correctly because it has detected an electrical connection error with one of its internal sensors.
Your boiler has lost the signal from one of its internal temperature sensors, which is causing it to stop heating your home as a safety precaution.
Your boiler has stopped working because it is unable to accurately read the temperature of the water returning to it, as a temperature sensor has developed a faulty electrical connection.
Your boiler is struggling to detect the outside temperature because the connection to the external weather sensor is disconnected or faulty.
Your boiler is having trouble communicating with the external weather sensor on the outside of your property, causing it to lose track of the outdoor temperature.
Your boiler is struggling to keep the burner flame stable, which is preventing it from staying lit to heat your home.
Your boiler has detected heat or fire inside when the gas supply should be turned off, which indicates a serious safety error.
Your boiler is unable to safely vent exhaust gases, so it has stopped working to prevent any risk of fumes entering your home.
Your boiler's fan is not spinning fast enough to clear waste gases safely, so the system has shut down to prevent a safety hazard.
Your boiler is struggling to detect the temperature of your hot water supply because a connection to its internal heat sensor has been lost.
Your boiler is having trouble communicating with the probe that measures the temperature of your hot water storage tank, which will likely prevent your hot water from heating up properly.
Your boiler is having difficulty communicating with its hot water storage tank, which means your heating or hot water system has likely stopped working correctly.
Your boiler has lost the connection to the temperature sensor inside your home, so it currently does not know whether your rooms are warm or cold.
Your boiler has identified a broken connection or faulty sensor in the vent system meant to carry waste gases away, so it has safely shut down to prevent unsafe operation.
Your boiler has detected an issue with the sensor that monitors the exhaust system, meaning it has safely shut down to prevent any risk of fumes entering your home.
Your boiler has detected that the exhaust gases leaving the flue are getting dangerously hot, so it has shut itself down to prevent damage or safety hazards.
Your boiler has lost the ability for its internal computer parts to 'talk' to each other, meaning it has shut down as a precaution to prevent unpredictable operation.
Your boiler has been manually reset too many times in a short period, so it has locked itself for safety to prevent damage.
Your boiler is struggling to read the temperature correctly because a connection in its internal sensing system has developed a fault.
Your boiler has detected that the external temperature sensor for your underfloor heating system is not sending a signal, which is preventing the boiler from firing.
BoilerFaultCodes