In message , Paul G
writes

Thanks for your help. I got the cover off the only relay on the cct
board, and could see that it was not operating when it should.
When I operated it manually, with a plastic probe, the main burner
lit.
So I need a new relay. Any idea where I can get one from? Maplins or RS
don't seem to have anything like it.

I'm sure it's available from both

--
geoff