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  1. G

    Unless hot water on, overheat stat. blows

    Problem solved Original problem caused the boiler to overheat, which damaged fibre washers on H/W flow switch causing a leak. Helpful neighbour? had replaced same but inadvertently replaced flow switch in wrong direction. Now rectifed, H/W fine, problem remains on C/H side. Gas pressure...
  2. G

    Unless hot water on, overheat stat. blows

    Thanks for the feedback. No H/W unless C/H on., obviously problem with flow switch / circuit board (related or additional problem I don't know as yet) Only 1 pump, no diverter valve listed in parts list/ cant see /locate one.
  3. G

    Unless hot water on, overheat stat. blows

    Worcester Combi boiler Installed 2 new radiators 6 weeks ago, no problems. CH installed originally (by me) 4 years ago and has worked well. Have been working abroad for the last month, while abroad, the boiler started playing up. 1. The auto air vent failed, needed replacing 2. The...
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