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Hi All, Posted on here once before and got a great answer first time round, so relying on you guys once again! DHW is going hot and cold. When there is hot water demand, boiler fires up and gives boiling hot water, then after 20 secs the boiler flame cuts out with a click and then...

Hi Guys, Very quick one I hope. I have a heatline vizo 24 boiler. Installed 6 years ago with no problems. Over the past week or so it has has classic signs of a clogged up heat exchanger. The dhw is going hot and cold. I hoped to solve this myself by draining the boiler, unscrewing the...