ok, thanks all for your help.
By the way, is there no way I can test the fan myself?
Or get my mate who's an electrician to test it?
What I mean if it's just an electric fan; is it feasible for me to get it tested?
Do I have to use a Corgi guy for this?
Do, of course, feel free to...
How can I tell if the fan runs?
Is it ok to run unit with cover off to see?
There is no spark through spyhole - I was reluctant to run unit without cover but I guess this is the only way to tell for sure if no spark?
Thanks for replies so far
I have a Worcester Bosch 280 Rsf which has recently failed to "fire up".
When I moved here I did not get any instructions as to running/maintenance of this unit but have been satisfied with performance so far.
It now fails to light; the green standby light is lit and demand light comes on...