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  1. W

    A question about valves

    So I have been told my system has a 3-way valve that can switch between HW or CH or both. The valve has a lever on the side which is spring loaded. When I push it down the water goes through to both HW and CH. When I release it and returns to rest the water goes only to HW. In this state...
  2. W

    Can't control central heating on its own

    On our heating we can't seem to turn on the central heating on when we want to. We have a back boiler, mid-position honeywell 4000-3916-003 valve, room thermostat, cylinder thermostat and a Siemens RWB9 programmer. The only way we can get the heating to come on is to turn up the temperature...
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