Hi my name isXXXXX have been in the Plumbing & Heating trade for approximately 15 years, lets see if i can help. If you look underneath and you will see two grey knobs, open them both to let more water in, do it slowly and when the pressure is on 1.5 bar turn them both off again and all should be well again.
Hi Brian, thanks for your reply to my query. Sadly I find that my boiler doesn't have two grey knobs or a pressure meter. So I can't try your solution. Have you any further ideas??
Hi Andrew. The short answer is no. The only thing under the boiler is the condensation pipe.
Hi Andrew. I can't see this anywhere. The boiler is located in the downstairs cloakroom and, as I understand it, the central heating boiler is separate from the hot water system. I think we will have to leave this until I can speak to somebody. You won't believe this but it is my 82nd birthday today and this is all too much for me. It's going to be a cold night!
Hi Andrew- sorry I couldn't get back to you before. Central heating is entirely separate from the hot water system. Don't worry about it, I'll speak to someone tomorrow. Thanks anyway.
The problem was not F22 at all - it was as before, a frozen condensation pipe, fixed with kettle of boiling water. Highly technical.
If you need a rating, you did your best with an incorrect diagnosis.