Firstly, apologies if I've posted to the wrong forum, I'm a complete novice..
My boiler is a kingfisher MF, about 5 years old. Has been working fine but recently the HW facility has stopped working. The boiler fires up, the flame light comes on but around 2-3 minutes later, the boiler turns off. Then there is a clicking noise - might be the relay on the control board. It clicks a few times and then stops and the boiler remains off.
The CH works fine and right now, turning the CH on is the only way of getting hot water - becoming a big problem now as it's getting warmer!
There are no motorised valves - the HW is gravity fed and when the CH is on, the water always gets heated. There's no way of stopping this.
I followed the Troubleshooting in the boiler manual and checked the Overheat thermostat. This seems to be shorting and so doesn't need to be replaced. The only thing left to do - according to the manual - is to change the control board....
Does this sound right? Please help, I'm totally out of my depth here!