Recent content by xepedro

Appreciate the advice. The Valve definitely has power running to it (I have checked), could the problem be: 1) part of the programmer failed? OR 2) maybe a part of the boiler board failed? Thanks in advance (Plumber who fitted the system says it is electrical, so not down to him...

<5year old heating system, comprising of (relative to this discussion) Worcester 30CDI gas boiler, honeywell ST9400c programmer (HW & CH) & 2 port Honeywell motorised valves. Heating is working fine BUT HW is being stopped automatically entering an unvented cylinder by the 2port Honeywell...