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radiator cold at the bottom puzzle

Discussion in 'Plumbing and Central Heating' started by josh10, 28 Jul 2013.

  1. josh10

    josh10

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    Hi
    I am new to this site so excuse me if I don't post my questions
    In the correct way.
    3 radiators in our 4 bed house are cold at the bottom kind of warm ish.
    I had plummers looking at it installing a pump and thousands of other things
    Like flushing the system cleaning the radiators and even installation of new radiators
    But believe it or not nothing worked.
    Can anybody help us with this puzzle!
    Would really appreciate that.
     
  2. Dan Robinson

    Dan Robinson

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    Can we have system details.

    Especially if you have microbore pipe work.
     
  3. josh10

    josh10

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    :mrgreen:
    Sorry.yes its a sealed system. Gloworm ultracom 30sxi with cylinder tank. The pipe
    Work is the normal plastic pvc ones. Don't know what microbore is, sorry. But its copper pipes from the boiler but I think half way it changes to pvc ones. Radiators in the loft 2 of the are boiling so pressure wise its fine but the second floor is the problem.
    Hope this helps
     
  4. bellairaphon

    bellairaphon

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    What happens when you shut the 2 radiators in the loft? Do the others become piping hot?

    Nathan
     
  5. Boilerman2

    Boilerman2

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    The only reason can be lack of flow through the offending rads because:
    Pump is weak
    System is not correctly balanced
    System pipe work is not correctly sized (design fault)
    Sludge or obstruction is blocking Radiators or pipe work
    ;)
     
  6. josh10

    josh10

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    No they are still the same. Even if we close all radiators in the house and leave
    Them on still they are the same. We have done balancing too still the same.
     
  7. josh10

    josh10

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    Have to mention one plumber thought its a system pipe work error but he said
    Its too costly to check as we have to open up the floors.and its wooden and tiles
    In the house. Is there any way to know that for sure?
     
  8. Dan Robinson

    Dan Robinson

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    Are these normal rads or column type?
     
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  10. Agile

    Agile

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    Anyone can only inspect what can be seen.

    Or remove floorboards etc. to see a bit more.

    Rads cold in the middle at the bottom are usually sludged up! That often needs power flushing.

    Tony
     
  11. josh10

    josh10

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    Normal rads. Power flushing already done.but maybe was not done right!
    But it took all day and £400. Also we installed new radiator on one of them
    Just incase but was still the same. However, when we powetflushed the system
    All the radiators were piping hot if that tells us something!
     
  12. duffin

    duffin

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    powerflush and all rads hot? pump shot?
     
  13. josh10

    josh10

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    Not sure pump was shot but I know the boiler was working at 80degrees.
    And thats how they checked for flow. British gas people that is.
     
  14. Charnwood

    Charnwood

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    Pump shot is not an operation performed on the system.
    Shot means cream crackered, cattle trucked, boogered etc.
     
  15. Steelmasons

    Steelmasons

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    Possibly TRV's are siezed shut.
     
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