Hot water issue

Discussion in 'Plumbers' Talk' started by Gee2113, Jun 13, 2019.

  1. Gee2113

    Gee2113 New Member

    I have a pretty typical issue where the radiators are coming on when the hot water comes on. Originally thought this is the motorised valve but that seems to be working (at least the motor anyway).

    I have also noticed that when this happens, the radiators and hot water seem to be getting very hot compared to what it should which sounds like a thermostat problem

    Could these issues be linked at all? Heating system is standard boiler with cylinder in the airing cupboard fes from a cold tank on attick.

    Many thanks in advance
  2. Heat

    Heat Screwfix Select

    Did it ever work on hot water without the heat going to radiators?
  3. Gee2113

    Gee2113 New Member

    Yeah this is a new issue that's started last week
  4. Heat

    Heat Screwfix Select

    Depends on what sort of system you have - could be S or Y plan for example.
    The motorised valve could be faulty. I would test it by removing the head and manually turning the valve to off position, or to hot water only if it is a Y plan 3port valve.

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