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Issue with Oil Heating System

  • 18-06-2019 12:03pm
    #1
    dfdream
    Registered Users, Registered Users 2 Posts: 532 ✭✭✭


    My heating system is like this.

    Oil boiler on timer with 2 downstairs heating zones and one upstairs.

    The norm is that if the timer is on and the zone calls for heat the zone valve opens. It closes when the timer turns off or the zone reaches temp.

    The issue thats been happening recently is that If the timer turns off and the zone is still calling for heat the boiler stays on until the temp is reached even though the light on the timer is off...

    If I adjust the zone temperature below the current temp then the zone valve closes and the boiler turns off.

    If i increase the temp again on the zone the boiler doesnt come back on.

    So it seems that the zone is keeping the boiler on after timer is off.

    Anyone any idea what could cause this ?

    Leaking voltage somewhere ?
    Faulty timer or zone controller ?

    Thanks


Comments

  • #2
    John.G
    Registered Users, Registered Users 2 Posts: 3,623 ✭✭✭John.G


    Is this happening with all the zones including the hot water one?. If so, just try using the boost function on any one of them or on the affected one and see does the boiler cut out when you switch the boost function off.


  • #3
    jimf
    Registered Users, Registered Users 2 Posts: 3,974 ✭✭✭jimf


    you may have a faulty motorised valve with a sticking micro switch


  • #4
    John.G
    Registered Users, Registered Users 2 Posts: 3,623 ✭✭✭John.G


    That,s the first thing alright that comes to mind but if i am interpreting the post correctly, in both cases he is killing the power supply to the MV and as it closes with spring return then, if faulty, and the micro switch is still made, neither method of shutting off the power should work?


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