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Hi all, i've bought another Nest thermostat for our current home, the setup is i believe Y-Plan and was previously fitted with a ST6400C honeywell controller and a generic thermostat. I've turned the stat to max as i wish to test everything first, when i turn on the heat using the existing...

Hi All, I am quite new to boilers etc but very competent. I've spent the past few days with a plumber fitting a used WB 30si. I bought the boiler from somebody who had it in an extension and used it rarely but they showed me it working. It sat in my garage for a few weeks and now its been...