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  1. M

    Vaillant VCW GB 221, do I upgrade to a modern boiler

    Hi, I've recently had an energy survey done on my house and it has come out a very poor 'F' rating. I have all the usual loft and wall insulation together with double glazing and the like, what I have been told is that if I replace my 20 year old Vaillant VCW GB 221 LPG boiler for a modern...
  2. M

    Vaillant VCW GB 221 CH too hot and shut down

    Hello, I have a Vaillant VCW GB 221, yesterday I came home to find the house was really hot and on further investigation realised the boiler was not regulating the temperature as it should. I don't have a room thermostat and rely totally on the rheostat type control (black dial numbered 1 - 9)...
  3. M

    Vaillant VCW GB 221 DHW is too hot

    Hi, I have a Vaillant VCW GB 221 and am having problems, the DHW it's too hot. The DHW always used to be on the cooler side even with the dial on the water valve turned to maximum but recently the water has been scalding from the taps. The boiler had a new NTC sensor and safety switch fitted but...
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