no heating or hot water:(?

Samantha - If you had posted the make and model of your boiler, it may have been that someone would have had more idea of what to look for.

You would do well to look for the installation guide and user manual for your boiler. Do that There is often a fault finding guide and diagrams of the parts in the guides/manuals. Google search is often very productive.

You may well find plumbers forums that have your make/model mentioned. These are often a gold mine of practical experience based information.

Anon
May 2016

wow, that gives me something to go on... I now need to find where all these things are to see if anything obvious... fingers crossed! Big Thank you for your reply it is much appreciated.

Samantha
May 2016

Samantha - call an engineer - allow him to change only one thing at your expense - be firm - tell him up-front that you want diagnosis and not guesses - otherwise he might change things on spec and have you pay for his incorrect guesses. Remember that it's you that's paying. Ask - "why are you changing that - and what if it doesn't cure the problem?"

The problem you have may be one of several things - not two or three...

Fan not working as it should
Pressure switch failing to detect fan operating
Pilot gas valve not opening
No spark to light pilot flame
Pilot flame sensor not detecting heat
Weak pilot flame
Main gas valve not opening
Control electronics defective.

Good Luck...
May 2016