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Boiler tripping RCD - who to call?

  • 07-01-2019 10:03pm
    #1
    sapper
    Registered Users, Registered Users 2 Posts: 423 ✭✭


    Hi - I have a 2 year old Ideal system boiler in a house I rent out. Last week the tenant reported that the boiler had (suddenly) tripped the RCD (the boiler is on its own circuit). I got the crowd that installed the boiler out and they found an airlock which they cleared and suggested was due to a leak in the cylinder. They ran the boiler and it worked, heating the rads without tripping the RCD. On that basis they said it wasn’t an electrics issue....

    They said if it was a leak in the cylinder there would be another airlock pretty soon which would need to be cleared and the system topped up with mains water so that the pressure was between 1 and 1.5.

    The tenant reported that the mains tripped again over the weekend while he wasn’t there. I went round there and found the pressure was at 1.25 and no airlock.

    The boiler is on its own circuit so i don’t think it can be a toaster kettle etc tripping the RCD

    So now I’m wondering if I should call the boiler company again, a plumber or an electrician?


Comments

  • #2
    DublinDilbert
    Registered Users, Registered Users 2 Posts: 5,401 ✭✭✭DublinDilbert


    You mention the boiler has its own circuit, is it on an RCBO? (MCB and RCD combined?) If it's not on an RCBO how do you know it was the boiler that tripped the RCD?

    You mention its a system boiler, is the pump integrated into the boiler?


  • #3
    [Deleted User]
    Posts: 0 ✭ [Deleted User]


    An airlock cannot cause this fault, your installers have to either prove it’s not the boiler by getting a boiler warranty call setup or identify what externally on the heating circuit is causing the problem and then go from there.

    You could always get them to put a plug on the incoming mains to the heating circuit to test it on a separate electrical circuit.


  • #4
    DublinDilbert
    Registered Users, Registered Users 2 Posts: 5,401 ✭✭✭DublinDilbert


    gary71 wrote: »
    An airlock cannot cause this fault

    I wasn't even going to go there :rolleyes:


    We need to know exactly what is tripping, as the fault could be on another circuit.


  • #5
    [Deleted User]
    Posts: 0 ✭ [Deleted User]


    DublinDilbert wrote: »
    I wasn't even going to go there :rolleyes:


    We need to know exactly what is tripping, as the fault could be on another circuit.

    A good sparks will put that to bed for you and usually the installer is on hand to help.


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