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  1. A

    Clearance above boiler

    I need to replace my undercounter floor-mounted combi-boiler. My heating engineer has suggested the Worcester Greenstar Highflow 440CDi. The product brochure states that it requires 600mm above to install (which would mean cutting my worktop). The heating engineer believes he can install it...
  2. A

    Kettling boiler requiring boiling of kettle

    I have a problem with a Worcester Highflow 400 RSF which my heating engineer is struggling to solve. To begin with the diverter valve went, replaced and solved the initial problem. Shortly after the system was producing a kettling sound when the hot water ran. Hot water was VERY hot and...
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