Johnson Starley C26d Fault codes & diagnostics

Your boiler's main internal computer has developed a communication fault and can no longer control the heating safely.

Your boiler's internal computer chips are failing to communicate because their software versions no longer match.

Your boiler is struggling to keep its burner lit and has shut down for safety after failing to detect a steady flame several times.

Your boiler has stopped working because it thinks the air in the heating ducts is overheating due to a faulty electrical sensor.

Your boiler has stopped working because it cannot detect the temperature of the air inside the heating system.

Your boiler is not receiving enough electrical power from your home's supply to operate safely.

Your boiler has stopped working because its internal temperature sensor has developed an electrical fault and is unable to read the air temperature correctly.

Your boiler has detected an electrical fault with the sensor that monitors exhaust gases, causing the system to shut down for safety.

Your boiler has stopped working because it cannot detect the temperature of the exhaust gases, causing it to shut down for safety.

Your boiler has tried to light several times but has been unable to create a flame, meaning you have no heating or hot water.

Your boiler thinks it sees a flame even though it hasn't actually started the ignition process yet.

Your boiler has shut down because its internal temperature has gotten too high and a safety switch has tripped to prevent damage.

Your boiler has stopped working because it cannot detect that the combustion fan is spinning properly to safely vent waste gases.

Your boiler's internal thermometer that measures incoming air temperature has developed a fault, meaning the system can't regulate its operation correctly.

Your boiler has detected a problem with the sensor that monitors exhaust gases, and it has shut down for safety purposes.

Your boiler's internal computer has developed a fault and can no longer control the heating system safely.

Your boiler's internal computer system has lost communication with its control parts, meaning it cannot receive instructions to provide heating or hot water.

Your boiler's internal sensor has stopped communicating correctly, preventing the system from heating up safely.

Your boiler has stopped working because the waste water produced during heating cannot drain away correctly, usually due to a blocked or faulty pump.

Your boiler's internal control screen and main computer board are not talking to each other properly, causing the unit to stop working.

Your boiler's electronic brain has encountered an internal error and can no longer safely control the heating process.