BoilerFaultCodesWhat the manual says
Manufacturer manualBlank Display
What causes this fault?
This fault occurs when the boiler's internal computer is no longer receiving electricity or has suffered a critical hardware failure. The most common reason is a blown fuse on the main circuit board caused by a power surge, though it can also happen if moisture has damaged the electronic components. Without a functioning brain to coordinate the sensors and valves, the boiler stays completely inactive for safety.
This issue is slightly more common during the autumn and winter months when increased electrical demand on the national grid leads to power fluctuations or surges that can trip the boiler's internal electronics.
Engineer required
This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Avoid the next call-out bill
A cover plan would handle faults like 4.16: no call-out fees, no surprise bills.
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