My ideal elan 2 50FF was failing to ignite automatically having checked it
over for loose connections I switched the electrics back on and it still
failed to light. Whereupon I decided to put the bottom plate which is just
really to prevent anything from getting into the electrics it wouldn`t quite
fit so I had to be rough with it and accidentally knocked the side of the
boiler, whereupon the boiler started clicking and fired up. Now the boiler
lights but after a short time anything from 10 to 30 minutes it fails to
ignite but the fan still runs if I give it a thump on the side casing then
the injector fires up.

I have also noticed that the downstairs radiators are not getting as warm as
the upstairs which seems to me to suggest that my pump (13 years old) is
failing. Could this also be related to the problem with the ignition? Maybe
the flow rate is not sufficient and the boiler is refusing to light for
safety reasons. Or is it some other problem perhaps with the Honeywell gas
control?

Love to solve this with a technical solution rather than a thump on the side
of the boiler.