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Problem with Radiators

  • 02-01-2016 4:29pm
    #1
    Galwayguy35
    Registered Users, Registered Users 2 Posts: 16,904 ✭✭✭✭


    I noticed that 2 rads aren't getting hot at all even though there is no problem with the rest of them.

    I thought they might have air in them only a small amount of air came out and no water at all.

    Just wondering what the problem might be.


Comments

  • #2
    K.Flyer
    Registered Users, Registered Users 2 Posts: 8,565 ✭✭✭K.Flyer


    Galwayguy35 wrote: »
    I noticed that 2 rads aren't getting hot at all even though there is no problem with the rest of them.

    I thought they might have air in them only a small amount of air came out and no water at all.

    Just wondering what the problem might be.

    The answer is in your question ;)

    Need to know which type of system you have.
    Do you have a large and small tank in the attic?


  • #3
    Galwayguy35
    Registered Users, Registered Users 2 Posts: 16,904 ✭✭✭✭Galwayguy35


    K.Flyer wrote: »
    The answer is in your question ;)

    Need to know which type of system you have.
    Do you have a large and small tank in the attic?

    No there is just one tank in the attic


  • #4
    K.Flyer
    Registered Users, Registered Users 2 Posts: 8,565 ✭✭✭K.Flyer


    Ok so, you central heating system needs to be re pressurised. Do you know where the valve is to bring up the water pressure in the heating system?
    Its usually in the hotpress.


  • #5
    Galwayguy35
    Registered Users, Registered Users 2 Posts: 16,904 ✭✭✭✭Galwayguy35


    K.Flyer wrote: »
    Ok so, you central heating system needs to be re pressurised. Do you know where the valve is to bring up the water pressure in the heating system?
    Its usually in the hotpress.

    Yes I know where it is.


  • #6
    K.Flyer
    Registered Users, Registered Users 2 Posts: 8,565 ✭✭✭K.Flyer


    Make sure the radiator valves are open and bring up the system pressure to approx 1.5 bar, close the filling valve and vent the air from the radiators. Repeat the process until the rads are fully vented. When the rads are fully vented set the pressure to 1.25 - 1.5 bar and run the heating system. You may need to vent them again after the system has run for a while to get the last of the air out.


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  • #7
    Galwayguy35
    Registered Users, Registered Users 2 Posts: 16,904 ✭✭✭✭Galwayguy35


    K.Flyer wrote: »
    Make sure the radiator valves are open and bring up the system pressure to approx 1.5 bar, close the filling valve and vent the air from the radiators. Repeat the process until the rads are fully vented. When the rads are fully vented set the pressure to 1.25 - 1.5 bar and run the heating system. You may need to vent them again after the system has run for a while to get the last of the air out.

    Ok I'll try that.

    Thanks


  • #8
    grahamor
    Registered Users, Registered Users 2 Posts: 872 ✭✭✭grahamor


    K.Flyer wrote: »
    Make sure the radiator valves are open and bring up the system pressure to approx 1.5 bar, close the filling valve and vent the air from the radiators. Repeat the process until the rads are fully vented. When the rads are fully vented set the pressure to 1.25 - 1.5 bar and run the heating system. You may need to vent them again after the system has run for a while to get the last of the air out.

    I have a similar issue and want to ensure i'm following this correctly :

    - So, the heating should be off and all radiator valves should be fully open.
    - Should the pressure start increasing as soon as i open the valve in the hot press or does it take a few minutes to get going ?
    - Does venting the air from the radiators just mean bleeding them again until air stops coming out ?
    - I assume the pressure will decrease again once vented ?

    Thanks for the info and sorry for noob questions :)


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