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Heat not reaching all radiators

  • 31-10-2018 9:03am
    #1
    mossy464
    Registered Users, Registered Users 2 Posts: 1,146 ✭✭✭


    Hi,

    We have a problem where heat is not getting to all radiators if all are turned on.

    We have a problem with low water pressure also and wondering would this affect the radiators.

    The boiler was replaced last year and the system was flushed.

    Currently have two rads turned off upstairs in unused bedrooms and the other rads in the house are working fine.

    However, we have found that if we turn on the rads upstairs we might find that other rads downstairs go cold.

    Any ideas?


Comments

  • #2
    africates
    Registered Users, Registered Users 2 Posts: 81 ✭✭africates


    Afaik the rads need to be balanced - one of the valve on the rad is for that and once set it shouldn't be changed. E.g. the incoming valve (the one which you feel hot 1st) is to regulate temperature and turn a rad on or off. The other valve (out) is for balancing. The idea is that a rad which is closer to the cylinder needs less flow so out valve needs to be opened only a bit, next one bit more, etc.
    Plumbers here feel free to correct me if I'm wrong :)


  • #3
    Doctors room ghost
    Registered Users, Registered Users 2 Posts: 4,837 ✭✭✭Doctors room ghost


    If the heating system is zoned turn off downstairs rads and leave on upstairs ones.give it an hour like that with your upstairs rads open and bleed them starting with the rad first on the line and finish with the one at the end of the system.
    If that doesn’t work turn off the first few rads on the line and it will push the air through to the last.
    If that works you should be able to leave them all on provided the system is strong enough for the amount of rads kw wise.
    The idea is to force the air to the last bleed point by using the pressure of the system.closing off downstairs and the ones upstairs that are working when doing it pushes it through with maximum pressure


  • #4
    mossy464
    Registered Users, Registered Users 2 Posts: 1,146 ✭✭✭mossy464


    Doctors room ghost wrote: »
    If the heating system is zoned turn off downstairs rads and leave on upstairs ones.give it an hour like that with your upstairs rads open and bleed them starting with the rad first on the line and finish with the one at the end of the system.
    If that doesn’t work turn off the first few rads on the line and it will push the air through to the last.
    If that works you should be able to leave them all on provided the system is strong enough for the amount of rads kw wise.
    The idea is to force the air to the last bleed point by using the pressure of the system.closing off downstairs and the ones upstairs that are working when doing it pushes it through with maximum pressure

    System isn't zoned unfortunately. Boiler is a year old and there's a mixture of older and new rads. It's an old house.

    Some of the rads don't have temperature gauges to change. If balancing is required how does one go about doing this?

    Is it a diy job?


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