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Reconnected rad won’t heat

  • 20-09-2018 6:17pm
    #1
    flogen
    Moderators, Society & Culture Moderators Posts: 10,247 Mod ✭✭✭✭


    Just put a rad back that was disconnected for decorating (it was off for a good few months, if that makes any differences).

    I’ve reconnected it on both sides, opened the valve and bled it and turned the thermostatic value up full but when I put the heat on there’s nothing getting to it (the pipe on the thermo side is getting hot but that’s it).

    The heating is working fine elsewhere - any ideas as to what might be going wrong?


Comments

  • #2
    jimf
    Registered Users, Registered Users 2 Posts: 3,975 ✭✭✭jimf


    if you had the rad stored upside down which people usually do you may have a bit of debris stuck around the vent hole

    remove vent screw and gently probe around internally this may solve your problem

    something like a cotton bud with the tip removed should suffice

    might be best to do this with heating off otherwise you could have very hot water to
    contend with


  • #3
    agusta
    Closed Accounts Posts: 1,590 ✭✭✭agusta


    Also if above is not the issue,turn off all the other rads and just leave that rad on and see what you get at that rad


  • #4
    flogen
    Moderators, Society & Culture Moderators Posts: 10,247 Mod ✭✭✭✭flogen


    jimf wrote: »
    if you had the rad stored upside down which people usually do you may have a bit of debris stuck around the vent hole

    remove vent screw and gently probe around internally this may solve your problem

    something like a cotton bud with the tip removed should suffice

    might be best to do this with heating off otherwise you could have very hot water to
    contend with

    Thanks - it was on it’s side so that’s definitely the possible problem.

    Do you mean the bleed valve or where the rad connects to the pipes?
    agusta wrote: »
    Also if above is not the issue,turn off all the other rads and just leave that rad on and see what you get at that rad

    Al bar this and one rad in the house was off when I put the heat on first. Will try again with everything else off


  • #5
    jimf
    Registered Users, Registered Users 2 Posts: 3,975 ✭✭✭jimf


    bleed valve


  • #6
    agusta
    Closed Accounts Posts: 1,590 ✭✭✭agusta


    If the rad still fails to heat.The pin in the thermostatic valve is probably stuck in the closed position.,ensure the return valve is in the full open position.To check pin in the thermostatic valve,see video attached,https://www.youtube.com/watch?v=phFW-IIsH54


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  • #7
    flogen
    Moderators, Society & Culture Moderators Posts: 10,247 Mod ✭✭✭✭flogen


    agusta wrote: »
    If the rad still fails to heat.The pin in the thermostatic valve is probably stuck in the closed position.,ensure the return valve is in the full open position.To check pin in the thermostatic valve,see video attached,https://www.youtube.com/watch?v=phFW-IIsH54

    Thanks for that.

    I checked the pin yesterday and there was a bit of movement, which I presumed was enough... but when I checked a different rad today I realised it should have been moving a bit more.

    Oddly enough, though, when I took the dial bit off this morning the pin had popped up by its own accord so I didn’t have to do anything. Sure enough, when I fired up the heater this morning it got hot in no time.

    Thanks all for the suggestions.


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