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  1. M

    switchmaster

    What is the purpose of the''advance'' dial knob? If you turn it (it is unidirectional), with the above settings, it either switches the boiler ON or OFF. :wink:
  2. M

    switchmaster

    Thank you very much. It looks like I have got another problem, I have set both the CH and WH knobs on constant but the boiler will not come. The water storage tank thermostat is working alright.
  3. M

    switchmaster

    I DO NOT KNOW THE COMBINATION OF THE TIMER PEG SETTINGS ON THE SWITCHMASTER 900. THEY ARE green/red/blue/yellow. WHICH ONE IS USED AS ON/OFF?
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