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OK OK I give in thanx to everybody. So the concensus is that it is the plate heat exchanger.Looks like i will have to dig deep then!! You are right Nickso the spindle on the little grey knob is so weedy that i am reduced to using pliers to turn it now. Ps. I will turn off the mains to see if...

Hi Craig There does not appear to be a filling loop or a flexy hose or even a ball valve on the input side of the boiler. The original installer seams to have done the job " on the cheap" The only way to turn off the system is via the main stop cock in the garden. I initially replaced the...

Hi everyone, I am having problem with my 6 year old Worcester 28cdi rsf. the gauge is reading 2.8 bar, and is causing the pressure relief valve to discharge, even when the boiler is not running. I have reset the pressure via the relief valve back to 1.5 bar,but it soon creeps back up again. I...