Thanks very much for your speedy reply. Maybe you can help further. Do you know if there is a website that shows wiring diagrams for this model. I have looked but cannot find anything. Or, is a thermostat easy to fit?
Once again thanks very much.
We have recently moved house and have the above boiler fitted, which we believe is around 24 years old. We have discovered that when we put the boiler on to heat the water it is boiling it up rather than cutting off at the thermostat. The pipes bang and it makes an awful noise after about 40...