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How to control my CH thermostats please

Discussion in 'Plumbing and Central Heating' started by Sabatinitennis, 18 Oct 2020.

  1. Sabatinitennis

    Sabatinitennis

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    Just moved into a four-bed, five year old house in Glos.
    There is a Worcester Greenstar boiler in kitchen on the ground floor.
    On a ground floor hallway wall is a Honeywell CM 907 thermostat which has too many buttons and programmes and a second one on the wall of the first-floor main bedroom and, seemingly, a third thermostat in the airing cupboard which houses the large water tank on the first floor.
    All radiators excrpt two have thermostats on, so I cannot turn down the excessive heat that the main bedroom radiator emits.
    Ok ..questions ...(1) can ALL radiators be fitted with thermostats? ....
    (2)if I turn all the radiators down will the boiler blow up as the heated water has nowhere to go?
    (3) If I go on holiday and want to turn the boiler off ...which of the three thermostats do I turn off? Is one a dominant one?
     
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  3. muggles

    muggles

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    1) Bit of a debating point but I say yes, provided there's a suitable bypass in place to maintain a minimum flow rate through the boiler.

    2) No

    3) All of them. They will all have equal priority
     
  4. Sabatinitennis

    Sabatinitennis

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    Thank-you
     
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