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In Hot Water.......

Discussion in 'Plumbing and Central Heating' started by Martin Cannon, 22 Oct 2019.

  1. Martin Cannon

    Martin Cannon

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    Has any one out there got any ideas why my boiler is heating up my hot water the pump remains on the boiler fires up every short while, then of mean while the pump is merrily running away and by the end of the day the water is really very HOT. I have just fitted a Hive Active 2, double checked and triple checked the wiring positions as per listed on the Wiring Centre. The central heating is working fine. Any Help will be Gratefully Received.

    Martin
     
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  3. ianmcd

    ianmcd

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    we will need a lot more information, boiler make and model, S or Y plan? do you have a cyl stat ?
     
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  4. RigidRaider

    RigidRaider

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    Have you actually measured the temperature of the water at the tap?
     
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  5. ericmark

    ericmark

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    I have not looked at Hive software, but often there is anti legionnaires software built in which will every so often heat the water to over 65°C. I had it with Nest, could not work out why when nothing set to run, central heating boiler was on, found it could be disabled and that's what I did, it seems this is quite common.
     
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  6. Martin Cannon

    Martin Cannon

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    Good evening all.

    So it is a;

    Y Plan.
    Yes the is a cylinder thermostat.
    Brand new 3 way valve.
    Fully pumped.

    Full story, summer time, hot water working fine, 4 weeks ago tried the heating, would only come on when the HW was off, hence new 3 way valve. Still the same problem, so thought programmer, bought a Hive Active 2, fitted and here i am asking for help............ CH working fantastic, HW working but not as i think it should and or was. If it should work like this with a Hive, please let me know!!!!!!!

    Legionnaires, i will ask Hive.

    Water temp at the tap, really very hot.

    Martin
     
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  8. Martin Cannon

    Martin Cannon

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    Sorry Boiler is a Baxi Solo 18 HE.
     
  9. ericmark

    ericmark

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    Y plan default is hot water, if the white wire is powered then it goes mid way, and if white and grey are powered it goes all the way and stops water to DHW. mid-position-valve.jpg So if you lose connection to grey then can't turn DHW off. This shows how it works.
     
  10. Martin Cannon

    Martin Cannon

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    So tomorrow I will check and make sure that I have not screwed on to the insulation of the wires and not just that they are in the correct position.
     
  11. RigidRaider

    RigidRaider

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    Have you actually measured the temperature of the water at the tap? It should be around 60c.
     
  12. wwwebber

    wwwebber

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    Hive doesn't control your hot water temp - it just schedules when your boiler can heat it.
     
  13. DIYnot Local

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