Baxi Combi 224, 228, 424, 428 Fault codes & diagnostics

Your boiler has lost its connection to one of the internal thermometers that monitors the heat of the water returning to the unit, causing it to shut down to prevent damage.

Your boiler has lost the ability to accurately measure the temperature of the water returning to it, so it has shut down to protect itself.

Your boiler has struggled to keep its flame alight multiple times today and has shut itself down as a safety precaution.

Your boiler has detected that water is not flowing through the system correctly, which is preventing it from heating your home or water safely.

Your boiler has lost the electronic connection needed to control the gas supply, meaning it has safely shut down to prevent it from running incorrectly.

Your boiler is failing to detect the gas supply needed to start a flame, meaning it cannot produce heating or hot water until the issue is addressed.

Your boiler has stopped working because a sensor that monitors the water temperature inside the unit is sending an incorrect electrical signal, causing the system to shut down as a precaution.

Your boiler has lost its connection to its internal thermometer, so it can no longer accurately monitor the water temperature and has shut down as a precaution.

Your boiler has detected that the water inside the system has become dangerously hot and has shut itself down to prevent damage.

Your boiler has detected that it is getting too hot and has automatically switched itself off to prevent overheating.

Your boiler has failed to light the flame five times in a row and has now stopped trying for safety reasons.

Your boiler has detected that the internal fan responsible for safely removing exhaust gases is stuck or obstructed, preventing the boiler from igniting.

Your boiler has lost its connection to the fuel control system, meaning it cannot safely ignite to provide heating or hot water.

Your boiler has detected that the water leaving it is significantly hotter than the water returning, suggesting a blockage or a problem with how water is circulating around your heating system.

Your boiler is shutting down because it detects that the water inside is heating up much faster than it safely should.

Your boiler has detected that the water inside the unit has become dangerously hot and has shut itself down to prevent damage.

Your boiler is failing to move hot water around your radiators or taps, likely because it detects a blockage or a pump issue that prevents it from running safely.

Your boiler is struggling to control the temperature of your hot water, causing it to heat up much faster than it safely should.

Your boiler has lost its internal settings, meaning it cannot tell your heating system how to operate.

Your boiler's computer is confused because its internal settings do not match the specific way it was installed in your home.

Your boiler's computer has detected a configuration error and cannot safely provide heating or hot water until its settings are corrected.

Your boiler has lost the ability to read the temperature of the exhaust fumes, causing it to shut down for safety reasons.

Your boiler's main control panel is having trouble sending messages to the unit's brain, which means the boiler cannot operate properly.

Your boiler is trying to start but cannot keep a flame lit, meaning it is currently unable to provide heating or hot water.