op if you changed all those components please please please get you boiler checked by a rgi who has all the proper equipment to check its running safely. can u name the equipment you used to check boiler running safety and provide photos of your equipment , if you can i will tell you the part you need .
You don't have to ask, an RGI will be coming out to service and check over as soon as I've fixed this final seal. I do not possess the equipment required to service some of the items and hence will make no attempt to touch them.