"geoff" wrote in message
...
In message m, brass
monkey writes
Almost 4 years old, its been terrific until a couple of weeks back. DHW
was
suddenly very hot, 70C'ish (knob on #2). Turned it right down and down it
went. Turned back up to #2 and back to normal. Happened again today, any
ideas folks?


Dodgy pot on the pcb?

Else give us a ring on monday - 01923 229224 and I'll get max to go
through any other possibilities

Geoff, I did think of that and gave it a good work-out, but without any
lube.
Cheers for the offer, many thanks.