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Rad won't heat at the bottom

  • 13-11-2010 9:16pm
    #1
    Anthonyk2010
    Registered Users, Registered Users 2 Posts: 295 ✭✭


    I'm having a bit of trouble with my heating. One rad (a double one) is not heating at the bottom of the rad.

    I took it off checked both valves, washed the rad out and put it back on, but no luck. It seemed to heat very uneven, so i decided to replace it.

    Fitted my new rad yesterday and it is heating a bit better but still cool in the bottom.

    The pump did burn out about a month ago and we put in a spare one my brother had and i'm thinking could the pump be the problem.

    All the other rad are fine.

    Any ideas guys?


Comments

  • #2
    Micky Dolenz
    Registered Users, Registered Users 2 Posts: 44,080 ✭✭✭✭Micky Dolenz


    Turn off some of the other rads so the pump is only pumping through this one rad. There may be an air bubble in the line or a bit of sludge.


  • #3
    Buford T Justice
    Registered Users, Registered Users 2 Posts: 6,262 ✭✭✭Buford T Justice


    Sounds to me like sludge in the bottom of the rad to me. Have you an inhibitor in your system?


  • #4
    Anthonyk2010
    Registered Users, Registered Users 2 Posts: 295 ✭✭Anthonyk2010


    Fingers McGee wrote: »
    Sounds to me like sludge in the bottom of the rad to me. Have you an inhibitor in your system?

    Would agree only I installed a new rad Friday.

    What's an inhibitor mcgee


  • #5
    Buford T Justice
    Registered Users, Registered Users 2 Posts: 6,262 ✭✭✭Buford T Justice


    Anthonyk2010 wrote: »
    Would agree only I installed a new rad Friday.

    What's an inhibitor mcgee

    Hmmm, its a new rad?

    An inhibitor is an additive used to stop the internals of the rads corroding over time. As the heating water expands and tops itself up (in an open system) the water corrodes the rads, this causes sludge build ups in the rads and partially blocks them, Had a Huar of a time with it in my gaff. All the rads needed to be drained and rinsed before i added an inhibitor to it.


  • #6
    Anthonyk2010
    Registered Users, Registered Users 2 Posts: 295 ✭✭Anthonyk2010


    Micky Dolenz wrote: »
    Turn off some of the other rads so the pump is only pumping through this one rad. There may be an air bubble in the line or a bit of sludge.

    I'll try this tonight.

    Could the pump be the problem. It's a second hand one that we put in. Not sure about it history, but was told it was fine.


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