We don’t work on unvented cylinders very often so we took the opportunity to make a video when we came across this fault. Cold Water discharging from the tundish and the components we checked and replaced to diagnose and fix the fault
I have been quoted £210+VAT for this job including an expansion vessel also (which is working fine so going to DIY it as no longer trust the plumber for straight away saying it needed replaced). Sounds like London prices.
