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I have ordered new one in screwfix for Tuesday collection. And this one I have got I need to send back to Amazon, where I bought it. Thank you very much for all help.

Thank you very much. I have tryied continuity as you descibre and I have allways continuity between A and B. No continuity between A and C. Looks like it needs to be replaced. Just to be sure. As this is diagram for wiring. It looks like there should be LIVE in A and switch live in B. My...

Thanks for interrest everybody. And sorry for my terminology /I'm not an installer/. It looks like I did not explain what I want clearly. My fault. I would like to have only CM907 working with my Combi boiler. Yesterday I check continuity on CM907. I disconnect all wires from it, put batteries...

Hi. I have purchased /NEW boxed/ CM907 over amazon and need a help. From my boiler ISAR HE30 are comeing out 5 wires : * brown / blue / gree-yellow -- main power for old Danfos and * from L1 in boiler is RED which is LIVE wire / from L2 in boiler is BLACK which is SWITCH wire Here is how...