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    Gas Law about Boilers

    Dear Friends, I am a Plumber. Would anyone know what piece of Law tells me I cannot work on a Boiler. Gorgi say that in order for you to work on Gas Appliances you need to be Gas Trained, which is right. But what if I am changing a Diverter Valve, or a Motorised valve, or a Heat...
  2. R

    vaillant combi

    If you have not had anything changed recently, then it may be your diverter valve. Check the rear of the valve and see if the micro swithes are moving in for Central Heating or out for domestic hot water. if no movement, then your diaphram needs replacing in the diverter valve.
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    Central Heating

    Thank you for your replys. Where would I locate the build up of Scale?. I have Cleaned and Flushed out the Main Heat Exchanger, DHW Heat Exchanger, Diverter Assembly, Water section diaphram linked to the servo control and control/connection lines to the Diverter. The Flow rate is ok. All...
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    Central Heating

    I have a Vaillant 240 VCW XH Combination Boiler and it is 12 years old. I have replaced the Main CH Heat Exchanger and the Diaphram including the Diverter. The problem is when the CH is on and DHW is drawn at the same time. Once DHW Tap is closed then the boiler shuts down including the...
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