Baxi 816 Heat Fault codes & diagnostics

Your boiler has detected that the water inside it is getting too hot, too quickly, or is unable to circulate properly, so it has shut down to prevent damage.

Your boiler is struggling to accurately measure the temperature of the water flowing through it, so it has shut down to prevent overheating.

Your boiler has received a signal from an external control, such as a smart thermostat or a safety device, telling it to turn off.

Your boiler has detected that it is running much too hot and has automatically shut itself down to prevent damage or overheating.

Your boiler has stopped because the flame inside has gone out and it cannot get it to stay lit.

Your boiler is failing to light or stay lit, which means it has stopped producing heat and hot water as a safety precaution.

Your boiler's internal computer is struggling to communicate with its own parts, meaning it has safely shut down until it can 'talk' to itself properly again.

Your boiler is unable to safely move air through its system, so it has shut down to prevent any risk of incomplete combustion.

Your boiler's internal computer is experiencing a software or communication error and has stopped working to prevent any potential damage.

Your boiler's internal computer has encountered a memory error or a communication issue with its control system, preventing it from starting up correctly.

Your boiler has detected an internal electronic error within its main control system that is preventing it from starting safely.

Your boiler has detected a general internal fault that is preventing it from starting up correctly.