On Tue, 30 Jun 2020 08:48:36 +0100, The Natural Philosopher
wrote:

On 28/06/2020 19:46, Mike McLeod wrote:
Just stopped working! No hot water or heating. Just won't fire-up for
some reason.

Worcester Greenstar Heatslave 18/25 oil-fired.

Got power to the controller board; no fuses blown. Any suggestions?

does the air pump spin up and the igniter crackle?

Thanks for your interest, but it's been fixed now (expansion tank
membrane perforated).