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Gas CH boiler bubbling at startup

  • 11-09-2013 1:46pm
    #1
    Funky Phantom
    Registered Users, Registered Users 2 Posts: 71 ✭✭


    Hi folks

    I've a Potterton Suprima thats been switched on today for the first time after summer months, boiler attempts to start but I hear a load bubbling sound in the unit and it cuts off.

    Pressure gauge shows 1.5

    Has anyone any idea what the problem could be and how to fix,

    thanks

    FP


Comments

  • #2
    corkgsxr
    Registered Users, Registered Users 2 Posts: 3,404 ✭✭✭corkgsxr


    Try bleeding the rads. Sounds like its air. The flow sensor would stop it firing with excess air


  • #3
    DGOBS
    Hosted Moderators Posts: 3,496 ✭✭✭DGOBS


    Only the later Suprimas had flow sensors fitted


  • #4
    nmacc
    Registered Users, Registered Users 2 Posts: 459 ✭✭nmacc


    Sounds like no flow through the boiler. Check that the pump hasn't seized by opening the large screw on the front of the pump & turning the pump rotor with a flat-bladed screwdriver - preferably with the boiler off!

    Water will come out when you remove the screw, so have something ready to catch it.


  • #5
    shane0007
    Closed Accounts Posts: 4,677 ✭✭✭shane0007


    nmacc wrote: »
    Sounds like no flow through the boiler. Check that the pump hasn't seized by opening the large screw on the front of the pump & turning the pump rotor with a flat-bladed screwdriver - preferably with the boiler off!

    Water will come out when you remove the screw, so have something ready to catch it.

    So you are telling the OP to commit a criminal offence!
    Nice advice.... very helpful....


  • #6
    Dtp79
    Closed Accounts Posts: 2,097 ✭✭✭Dtp79


    shane0007 wrote: »
    So you are telling the OP to commit a criminal offence!
    Nice advice.... very helpful....

    Is the pump not external to the boiler on the suprima Shane?


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  • #7
    sullzz
    Registered Users, Registered Users 2 Posts: 2,409 ✭✭✭sullzz


    Dtp79 wrote: »
    Is the pump not external to the boiler on the suprima Shane?

    Could be a suprima system


  • #8
    Dtp79
    Closed Accounts Posts: 2,097 ✭✭✭Dtp79


    sullzz wrote: »
    Could be a suprima system

    True true. I just took one out a few days ago and pump was external. That's what had it in my head


  • #9
    sullzz
    Registered Users, Registered Users 2 Posts: 2,409 ✭✭✭sullzz


    Either way I wouldn't advise the op to release the screw on the pump , its probably located above the boiler if its not a system boiler and with 1.5 bar in the system it could get messy very quickly above the electrics


  • #10
    Dtp79
    Closed Accounts Posts: 2,097 ✭✭✭Dtp79


    sullzz wrote: »
    Either way I wouldn't advise the op to release the screw on the pump , its probably located above the boiler if its not a system boiler and with 1.5 bar in the system it could get messy very quickly above the electrics

    Couldn't agree more but was just saying that if the pump is external it wouldn't be a criminal offence


  • #11
    shane0007
    Closed Accounts Posts: 4,677 ✭✭✭shane0007


    Dtp79 wrote: »
    Couldn't agree more but was just saying that if the pump is external it wouldn't be a criminal offence

    Before giving advice on gas boiler systems, the facts should be established first by nmacc. The OP may well have a non-system boiler but it could be equally as likely to be a system one with an internal pump.
    The issue may also not be the pump so encouraging a homeowner to work on a gas fed system may also lead them to think it is ok to enter the boiler.

    Proper advice is when in doubt, call in an RGI. Which is safer?


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  • #12
    Dtp79
    Closed Accounts Posts: 2,097 ✭✭✭Dtp79


    shane0007 wrote: »
    Before giving advice on gas boiler systems, the facts should be established first by nmacc. The OP may well have a non-system boiler but it could be equally as likely to be a system one with an internal pump.
    The issue may also not be the pump so encouraging a homeowner to work on a gas fed system may also lead them to think it is ok to enter the boiler.

    Proper advice is when in doubt, call in an RGI. Which is safer?

    Obviously it's always safer to call an RGI.


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