mid-position valve

  1. R

    Central heating control unit and room thermostat clicking - affecting boiler

    I have an odd problem with my central heating controls which I hope someone might be able to advise on. Just after Christmas the room stat started clicking as if it was passing the set temperature, but doing it as rapid-double clicks, each pair a few seconds apart, going on for a few minutes at...
  2. J

    Mid-Position Valve

    Is it normal for the orange wire of the mid position valve to temporarily cease being live when the valve is switching from the mid-position (heating + h/w) to the heating only position? This causes the boiler to momentarily turn off.
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