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Discuss Can't turn off central heating in the Central Heating Forum area at UKPlumbersForums.co.uk.

  1. barca

    barca New Member

    Dear forum
    My problem is I can only turn the central heating off and on by the main switch in the airing cupboard
    The program timer is Siemens RWB29 it all lights up I have just put in a new cell battery
    Or do I need a new HSA2 or could it be the thermostat sitting next to the programmer
    Any help would be good
    Thanks
     
  2. DGT plumbing

    DGT plumbing GSR

    What is you set up?
    Combi or traditional.
     
  3. barca

    barca New Member

    Sorry It’s a traditional
     
  4. townfanjon

    townfanjon Trusted Plumber GSR Top Contributor!!

    If you turn your room stat and cylinder stat down does it go off
     
  5. DGT plumbing

    DGT plumbing GSR

    Do you have a tree way valve ?
     
  6. DGT plumbing

    DGT plumbing GSR

    *three
     
    • Funny Funny x 1
  7. barca

    barca New Member

    No the thermostat doesn’t turn off and it’s a two way valve
     
  8. townfanjon

    townfanjon Trusted Plumber GSR Top Contributor!!

    Could you post some pics of your system, you would generally have 2 x 2 port valves
     
  9. barca

    barca New Member

    Sure I will do that in the morning
    I will take a photo of the 2x valves
    Thanks
     
  10. Ian10261

    Ian10261 Plumber GSR

    More than likely the 2 port is stuck open which means the microswitch inside is making the connection between the grey wire(permanent live) and the orange wire (switched live to the boiler).
    You may get away with taking the actuator head of and moving the valve spindle manually back and forth to free it up but this will more than likely be just a temporary fix. A new valve is the way to go and i would suggest a system flush while your at it, as dirty primary water could well be the cause of the valve sticking open.
     
    • Useful Useful x 1
  11. barca

    barca New Member

    Hope that helps

    79E89219-E294-474F-96BF-386977D64DE6.jpeg
     
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