Your boiler’s internal computer has overheated, causing it to shut down to prevent permanent damage.

Electronics temperature too high | Electronics too hot due to external effect, electronics defective

What causes this fault?

This fault occurs when the boiler's internal control center, the PCB, reaches an unsafe operating temperature. It is usually caused by heat radiation from a leaking internal component or a hardware failure within the electronics themselves that causes them to self-overheat. The boiler shuts down immediately to protect the delicate circuitry from melting or catching fire.