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rads not heating

  • 12-03-2012 7:42pm
    #1
    avfc1874
    Registered Users, Registered Users 2 Posts: 3,754 ✭✭✭


    hi . we've got a solid fuel stove that heats the rads,noticed last night that the rads were not heating properly upstairs so bled a couple of them air came out first and then small bit of water but just in drips then nothing. in the meantime i could hear the water in the pipes from the stove getting really hot and could hear the water in the small tank in the loft boiling, so i let the fire die down have not lit the fire today. the pump is working there is water in the down stairs rads but just drips from the ones upstairs. any advice thanks:(


Comments

  • #2
    DoneDL
    Closed Accounts Posts: 902 ✭✭✭DoneDL


    avfc1874 wrote: »
    hi . we've got a solid fuel stove that heats the rads,noticed last night that the rads were not heating properly upstairs so bled a couple of them air came out first and then small bit of water but just in drips then nothing. in the meantime i could hear the water in the pipes from the stove getting really hot and could hear the water in the small tank in the loft boiling, so i let the fire die down have not lit the fire today. the pump is working there is water in the down stairs rads but just drips from the ones upstairs. any advice thanks:(

    It sounds like an airlock, a word of warning never bleed a system that is running hot most especially a solid fuel system. Try bleeding the system when the system is cold. I would also suggest running the pump by turning the stat to minimum and run it for five minutes, bleed again and repeat until you are sure that the system is filled with water. Check the tank in the loft and make sure it`s not damaged and the water level isn`t too high. When you light the fire again make it a small fire set the pipestat
    to about 30oC and see if heat moves freely to the rads. Then work up to a normal fire with the stat set higher.


  • #3
    Tiercel Dave
    Registered Users, Registered Users 2 Posts: 797 ✭✭✭Tiercel Dave


    Check the water level in the expansion tank when the system is cold, sounds as if the ballcock might be 'stuck'. Dave


  • #4
    avfc1874
    Registered Users, Registered Users 2 Posts: 3,754 ✭✭✭avfc1874


    how much water should be in the expansion tank? theres a pipe coming out of the tank,its at the top of the tank the waters about an inch under this.


  • #5
    DoneDL
    Closed Accounts Posts: 902 ✭✭✭DoneDL


    About 1\3 of the tank.


  • #6
    sasol
    Registered Users, Registered Users 2 Posts: 285 ✭✭sasol


    DoneDL wrote: »
    It sounds like an airlock, a word of warning never bleed a system that is running hot most especially a solid fuel system. Try bleeding the system when the system is cold. I would also suggest running the pump by turning the stat to minimum and run it for five minutes, bleed again and repeat until you are sure that the system is filled with water. Check the tank in the loft and make sure it`s not damaged and the water level isn`t too high. When you light the fire again make it a small fire set the pipestat
    to about 30oC and see if heat moves freely to the rads. Then work up to a normal fire with the stat set higher.


    Just a quick question on that - so you are saying that the best time to bleed a rad is when the heating system is not on ? Or when it is on and before the rads have had a chance to get warm ?

    The reason I am asking is that I am having trouble with two rads in particular and airlocks and I have always bled them when the heating is on. Not sure why, but I always assumed it was the right thing to do.


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  • #7
    DoneDL
    Closed Accounts Posts: 902 ✭✭✭DoneDL


    sasol wrote: »
    Just a quick question on that - so you are saying that the best time to bleed a rad is when the heating system is not on ? Or when it is on and before the rads have had a chance to get warm ?

    The reason I am asking is that I am having trouble with two rads in particular and airlocks and I have always bled them when the heating is on. Not sure why, but I always assumed it was the right thing to do.

    The best time to bleed a system is when the system is cold. What I was referring to in the other post was turning the pump on via the stat without the heating being on to help clear any airlocks.


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