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  1. R

    Motorised Valve Siemens ZA-V222C Bangs/Clicks

    Central heating has been 'stuck on' for 2 days even though the thermostat was set to MIN, and CH and HW were OFF at the control unit. Boiler control dial was set to maximum. Checking the system, there was NO pressure in the system. I increased pressure to 1.5 bar, and bled the system since a...
  2. R

    Horstmann Econmy 7 quartz - Boost Not Working

    Can anybody help ? Just bought a 1970 era house with the given control unit. Boost is for only one hour. I am unfamiliar with this unit, but have just pulled the instructions off the web. If I turn boost anticlockwise to START, I do not get a light showing. If I manually continue to turn...
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