I have a Baxi Bermuda 551 back boiler which recently made 'arcing' sounds while opening the valve to fire up the burners. After a while it stopped firing up at all.
I checked the wiring, and found 1 loose (loose-ish ??) wire in the connector in the boiler. However it still doesn't work.
As a final test I by-passed the internal thermostat unit, but the value doesn't open and the burners don't fire up.
I am hoping that someone out there has some helpful ideas.
Thanks,
Sutters.