I have a Potterton Suprima 30 connected to a boilermate II, they are about 11 years old and today I had no hot water. The boiler isolation fuse is fine and there is electricity leaving the isolation box. There are no LEDs illuminated on the boiler and I tested the 'mains' in to find no supply voltage. I am confused as to why the leads leaving the isolator are black/red and the one labelled 'mains' into the boiler PCB are brown/blue. This aside, all I have changed between having water yesterday and non today was the thermostat temperature (down to 0), which seems an unlikely cause as the boilermate store temperature and boiler setting are both still at max. I have put it back up now anyway.
Any ideas what might have caused the failure in boiler power?
Any ideas what might have caused the failure in boiler power?