I have a Britony Combi Se boiler with the error code 50 80 which means domestic hot water thermostat this has been changed and after 2 weeks the error code is flashing again does anybody know what is causing this as it is not the part that has been fitted it must be something that is making the part do this.

Elaine, December 2014

Have you considered the case that the changed part did indeed solve the problem - the boiler then worked fine for two weeks - but after those two weeks the part that got replaced suffered a premature failure - and that you're the victim of bad luck?

Good luck..., December 2014