boiler stop starts when cold

[warrant]

got a worcster 9.24 rsf it stops and starts when cold, but then ok once warmed up, has on occasion not worked for a day or two then started again. any one any ideas??

 

[Tibbot]

It's in need of attention.

 

[warrant]

thanks I worked that much out for my self, wanted to know any ideas why doing that, valves switches blockage? as I said ok once been running once its stop and started few times

 

[dcawkwell]

Given age of boiler.
Boiler is waiting for something electrical.
If it simply never starts for a day or so.

I would suggest complete strip down clean out and reassemble
as a start. Including any sensors and continuity check all wiring. That may well show up the cause.