21 fault codes with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.
Replaced by: Chaffoteaux PIGMA
This boiler uses indicator light combinations
Note which lights are on, off, or flashing and at what speed. Match the combination to the cards below. Do not reset until you have noted the pattern. How to read fault codes →
Tap any card for details
Your boiler has stopped working because it is not receiving a reliable supply of gas, water, or electricity, preventing it from starting safely.
Your boiler has detected an ignition failure, meaning it is failing to light the flame required to provide heating and hot water.
Your boiler has detected an internal error that has caused it to stop working, and you need to access the internal memory to identify the specific issue.
Your boiler is trying to start, but it cannot sense a steady flame, so it has safely shut itself down to prevent gas from building up.
Your boiler has failed to ignite because it cannot detect a steady flow of gas, likely due to air being trapped in the supply line.
Your boiler has detected very cold temperatures and is running the pump to stop the water inside from freezing.
Your boiler has detected very low temperatures and is automatically activating its internal protection mode to prevent pipes from freezing.
Your boiler has detected that water is not flowing properly around your heating system, so it has safely shut down to prevent overheating.
Your boiler has stopped working because the water pressure inside the system is too low to operate safely.
Your boiler is struggling to detect the temperature of your hot water supply, so it has safely decided to stop heating your taps.
Your boiler is struggling to accurately measure the temperature of your hot water, which means it has stopped heating it to prevent the system from overheating.
Your boiler has lost the ability to measure the temperature of the water being sent to your radiators, so it has shut down as a precaution to prevent overheating.
Your boiler is struggling to start up and is repeatedly trying to ignite the flame without success.
Your boiler has lost its connection, meaning it cannot communicate correctly between its internal parts to start heating.
Your boiler is struggling to breathe because the internal fan that moves air through the system is not spinning fast enough to light or maintain the flame safely.
Your boiler is unable to safely move air and exhaust gases, so it has stopped heating to prevent a potential hazard.
Your boiler is struggling to switch between heating your radiators and providing hot water to your taps, which usually results in a loss of hot water.
Your boiler's control panel has lost its connection with the main computer, meaning the system cannot receive commands or function correctly.
Your boiler's internal control center is unable to talk to its main computer, causing the system to stop working entirely.
Your boiler has stopped working because it cannot light its internal flame or keep it burning, which has triggered a safety shut-down.
Your boiler has automatically turned itself off because it detected that the water inside has become dangerously hot.
BoilerFaultCodes