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Glow worm 30cxi F12

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  • Glow worm 30cxi F12

    Hi we have a glow worm 30cxi about 7 years old that just suddenly stops working and flashes F12 , we have had it fixed twice Know ie filling loop fitted varius parts removed and cleaned works great for a couple of mouths and its just gone Again !!! i can,t keep paying call out charges etc every 2 mouths.
    ps The filling loop does,nt do anything so cant represurise system. very cold/no hot water AGAIN!!

    Any ideas what keeps causeing this so i can advise my plumber

  • #2
    check connections on the pcb and user interface

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    • #3
      Originally posted by markhurst View Post
      check connections on the pcb and user interface
      Thanks i did this even took pcb out checked for dry joints etc Still no luck.

      When you try and fill boiler you can hear a slight wheezeing sound from boiler inners but not the rush of water like you should.

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      • #4
        F12 error is an indication of a poor connection between the two circuit boards. What does your display say regarding pressure? If you can't hear a rushing sound then I would suspect your boiler is already up to the required pressure.

        Hope this helps,

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