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Can’t get radiators to turn off

Discussion in 'Plumbing and Central Heating' started by Schimmy, 20 Apr 2018.

  1. Schimmy

    Schimmy

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    Hi,

    As it’s now summer I’ve wanted to switch off my heating entirely. It’s a modern system in a new build house. I’ve got a control panel (that now shows heating as off, hot water still on fine). I noticed that some of my radiators were still hot - even though on their controls I had turned each down to 0.

    I then took a look at the boiler and it shows a heating symbol, so I switched the heating aspect of this off too. This then meant that the radiators were cold - great! BUT, I then took a shower the next day to find I had no hot water (tab water was still hot), I guess this comes from a tank in the airing cupboard. So, I then turned the boiler back on but am back with two radiators that are slightly warm.

    I’ve got two switches (look like light switches) in the airing cupboard, I don’t know what either do (guess one is the immersion) but the highest one is turned on.

    The tank in there makes intermittent noises, a 5-10 dull mechanical whining sound, followed by a higher pinched ‘climax’ type sound.

    I have no idea how the heating system works and none of the instructions I have seem to work. Any help is much appreciated!
     
  2. 75pete

    75pete

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    So let's start by asking the make and model of the boiler
    Can you post a picture of said parts
    Are the two rads in bathrooms
     
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  4. Schimmy

    Schimmy

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    Hi, images attached.

    The radiators are at the bottom of the stairs and also in the living room (open plan with kitchen boiler in same room)

    Thanks!
     

    Attached Files:

  5. BWC

    BWC

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    Ok ... mmmm
    Need more information really , first thing I’d be looking at with no demand for heating at the programmer and room stat is to check that the 2 port valve (white box) which will have a silver leaver on the side is not locked open, leaver should be under resistance and not floppy when closed , danfoss 2 port valves which you have can keep the boiler to run and override external controls if they stick in the open position due to a seized valve spindle or stuck in its manual override position, you could also try with water only selected at the programmer feeling the pipe that exits the heating 2 port valve for let by. Post back with what you find ...

    Cheers
     
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  7. BWC

    BWC

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    Should of said to establish what valve is controlling your heating establish which valve has a pipe connecting to the hot water cylinder , this will be the the hot water 2 port , the other one will be the heating 2 port this is the one that needs checking out.
     
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