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3 Port Valve question/central heating problem

Discussion in 'Plumbing and Central Heating' started by jlyall, 26 Jan 2017.

  1. jlyall

    jlyall

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    Hi all,

    I've got an intermittent problem with my heating thats driving me crazy. It can work perfectly for days, and then I'll get no heating. In order to get it going again I turn off the power to the central heating for literally 5 seconds, and I can hear the 3 port valve wind back under the spring, then all works again perfectly. I've checked the wiring so many times and it all seems correct to the y plan diagram.

    I've got a worcester bosch greenstar 25i system boiler, nest thermostat, y plan with a hot water tank thermostat.

    Any help would be really appriciated!
     
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  3. HERTS P&D

    HERTS P&D

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    Have you thought you might have a dirty system where the 3 port valve is getting stuck?

    Do you have a magnetic filter on your system?

    Andy
     
  4. jlyall

    jlyall

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    That could be possible I guess. I haven't checked the water in the system tbh, but why would turning off the electric reset everything? Could it be possible that when a combination of h/w on and/or c/h on is causing the valve to move to its furthest position and its not moving back except when the power is turned off, and there is no power on the orange wire?
     
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