Recent content by Dennis Hicks

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    Glow Worm boiler control board SYMSI7.0

    Looking at the board with two relays on it looks like one relay drives the domestic hot water pump and the other the central heating pump which makes sense. However, other models of SYMSI7.0 can have three or four relays so what would these additional relays be driving?
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    Glow Worm boiler control board SYMSI7.0

    I'm trying to change the control board in my boiler (because I periodically get a fault code). The controller is a SYMSI7.0 but I notice on the web that there are slightly different part numbers e.g. 0310144400015 <- my original board 0310144400R18 0310144400S20 Eyeballing these boards the...
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