Thank for your replies.
The other thing I've noticed is that the flue isn't straight. When you look at it from outside it goes uphill, ie the open end is higher than the boiler end. To me, rain could enter couldn't it?
I have just had a new Worcester boiler fitted but the magnafilter is tilted by Chippenhamquite a bit. Visually it doesn't look great but the plumbers are back to finish itn off tomorrow so should I request they straighten it up. I guess it could affect performance?
People like Rob should be allowed to use the sites which are aimed at helping people.
I haven't broken anything, the replacement of the diverted is a simple task if done carefully.
It could be that there were other issues that I was seeking help on.
I did notice that the new diverter has an...
After a lot of research I decided to change my leaking diverter valve on Worcester Bosch 230i. Now the boiler won't fire. The fan comes on and the pilot ignites but it doesn't fully fire up. Any ideas?