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I have a Powermax 155x (open vented) which was installed in 2004 when the apartment was newly built. I’ve been getting hot water fine all year, but no heating to my radiators since trying to turn it on for the first time this winter. Here are my findings so far; • CH pump seems to be running...

Hi guys, Just moved into a flat (built in 2005) to find a powermax 155x sitting in it. I've done basic research online and so far understand that it's a tricky and odd boiler with an identity crisis that is a thermal store AND a combi (sort of). As some of you will know, on the boiler...