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All cleaned and spotless Put it all back together and had a look today. turns out the pin on the vacuum servo that hits the rocker on to the microswitch has seized Took that out and cleaned it and greased it and it’s working a treat now - although I think the ch thermo has now tripped as I’m...

So I have the above boiler and it works fine. I’ve always had to run the bathroom tap on hot to get the shower to go hot. I’ve replaced the diaphragm in the water valve - the top was very rusty so I also replaced the stuffing box. On putting it back together I could see the little rod was...