I have the britony combi se my boiler fires up for about a minute then cuts out I cant get any hot water, the valve on the lower left is leaking slightly. I have recently had a new pressure gage and new circuit board fitted. lights come on as If my boiler is working then it cuts out and the red light comes on?

Natasha, March 2015

the boiler could be overheating on hot water
[does it sound ike a kettle boiling?]

does the heating work normally?

most likely suspect is a blocked plate heat exchanger

Q, March 2015