Just had a go at that but nothing happened.
Do you possess any test equipment, at all - volt-stick, test meter, even a neon screwdriver?
Just had a go at that but nothing happened.

The supply needs to be checked/tested, you'll need to get someone in who can do that I'm afraid.No, none of those things![]()

My guess is faulty circuit board.
yep it's the pcb - new one being fitted right now.
yep it's the pcb - new one being fitted right now.

Unless something is wrong with the wireless receiver and it blew the PCB in the boilerI remain unconvinced, that a PCB failure, would mean mains supply is lost to an external wireless receiver.
The receiver's mains supply, though not essentially, would be simply looped from the boiler.
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