if you were a registered heating engineer you could get technical advise from worcester.do not attempt repairs yourself.get a good local engineer to sort it, it will be cheaper in the long term. by the way the 350 is now considered to be obsolete and spares, if available are thro' the roof. it may pay you to change your boiler.dont expect any heating enginer to help you, if you dont know what you are doing you'll end up doing more damage.
self emloyed heating engineer with over 45 years exp', September 2009
