Recent content by bullyrai

Hi, the DHW HEX has gone on the above boiler, replacement part is 6281525 which is a 16 plate HEX. I've found part 6281535 which is an 18 plate HEX and the size and fittings are the same (albeit a little fatter due to the additional plates). 6281535 was introduced to replace an earlier...

I have a SIME Format 110C Combi boiler which uses a SIT 845 Sigma gas valve. I've spent 2 weeks trying to isolate the problem with my boiler. It gradually ground to a halt, it began by only firing after a reset then it only came on in the evenings for a few hours. The fault light I am...