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baxi mega flow HEIE

  • 01-11-2013 6:07pm
    #1
    2012paddy2012
    Registered Users, Registered Users 2 Posts: 2,880 ✭✭✭


    boiler heating rads grand. Will not heat water. The bar is near3 ....heading for safety cut off....

    Anyone know what causes the temperature to rise ..had opposite before low pressure....on service 3 months ago ...plumber upped the pressure and grand till yesterday....

    has worked fine till recently...whats likely problem please


Comments

  • #2
    Egass13
    Registered Users, Registered Users 2 Posts: 1,056 ✭✭✭Egass13


    Not heatingt water is most likely zone valve problem .

    Pressure is a different story , problem with expansion vessel . What's the cold pressure set at ? Youll need an rgi to have a look


  • #3
    shane0007
    Closed Accounts Posts: 4,677 ✭✭✭shane0007


    Might be related. Water level low with highest point dry, i.e. cylinder coil. Heating on, high pressure as expansion vessel knackered.
    Equally could be 2 different issues.


  • #4
    Egass13
    Registered Users, Registered Users 2 Posts: 1,056 ✭✭✭Egass13


    shane0007 wrote: »
    Might be related. Water level low with highest point dry, i.e. cylinder coil. Heating on, high pressure as expansion vessel knackered.
    Equally could be 2 different issues.

    Good point , that's why your paid the big bucks !


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


    Egass13 wrote: »
    Good point , that's why your paid the big bucks !

    Am I??? I must have mislaid it all so.... cos I certainly don't have it!


  • #6
    2012paddy2012
    Registered Users, Registered Users 2 Posts: 2,880 ✭✭✭2012paddy2012


    Egass13 wrote: »
    Not heatingt water is most likely zone valve problem .

    Pressure is a different story , problem with expansion vessel . What's the cold pressure set at ? Youll need an rgi to have a look

    Thanks is that pressure value some where near water tank.?


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  • #7
    shane0007
    Closed Accounts Posts: 4,677 ✭✭✭shane0007


    You need to check the pressure when the system is cold. It should be circa 1.3 bar. Once this is established, the next option can be suggested.
    High pressure generally is a symptom of expansion vessel issue.


  • #8
    2012paddy2012
    Registered Users, Registered Users 2 Posts: 2,880 ✭✭✭2012paddy2012


    shane0007 wrote: »
    Might be related. Water level low with highest point dry, i.e. cylinder coil. Heating on, high pressure as expansion vessel knackered.
    Equally could be 2 different issues.

    Thanks are there expansion vessels expensive to fix? Only 4 years old


  • #9
    shane0007
    Closed Accounts Posts: 4,677 ✭✭✭shane0007


    If the diaphragm is not split, air is free so just labour charge. If it is split a replacement will be €100 - €130 plus labour. Must be done by a RGI for both jobs.


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