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Rad will not heat up

  • 24-11-2016 6:49pm
    #1
    aldub83
    Registered Users, Registered Users 2 Posts: 58 ✭✭


    One small rad in the kitchen won't heat up.tried flushing it out.didnt work so put a new rad on still didn't heat up.the pipes have water and rad is bleeding.water is warm at pipe from wall.also tried balancing by turning off all the other rads with heating on but the pipe or the rad didn't get hot then.anybody any ideas?


Comments

  • #2
    Gleefulprinter
    Registered Users, Registered Users 2 Posts: 206 ✭✭Gleefulprinter


    No issue with leaking?


  • #3
    aldub83
    Registered Users, Registered Users 2 Posts: 58 ✭✭aldub83


    Gleefulprinter wrote: »
    No issue with leaking?

    No not that I'm aware of


  • #4
    jca
    Closed Accounts Posts: 8,585 ✭✭✭jca


    Very frustrating, try opening the nut that attaches the valve to the radiator with the heating turned on. Let a good rush of water out, do it on the flow side first and then on the return side. A radiator in my fathers house does that occasionally and doing what I described gets it going again. I think the pipes airlock, his system is on its last legs tbh there are leaks everywhere.


  • #5
    aldub83
    Registered Users, Registered Users 2 Posts: 58 ✭✭aldub83


    jca wrote: »
    Very frustrating, try opening the nut that attaches the valve to the radiator with the heating turned on. Let a good rush of water out, do it on the flow side first and then on the return side. A radiator in my fathers house does that occasionally and doing what I described gets it going again. I think the pipes airlock, his system is on its last legs tbh there are leaks everywhere.

    Thanks I'll try this tomorrow


  • #6
    lazybones32
    Closed Accounts Posts: 3,647 ✭✭✭lazybones32


    Similar situation here but only the bottom quarter of the rad heats up; cleaned out the rad last night and bled it but no improvement...well, the 1/4 of the rad that heats up gets a lot hotter now. Will try the advice given here tomorrow.


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  • #7
    jca
    Closed Accounts Posts: 8,585 ✭✭✭jca


    lazybones32 wrote: »
    Similar situation here but only the bottom quarter of the rad heats up; cleaned out the rad last night and bled it but no improvement...well, the 1/4 of the rad that heats up gets a lot hotter now. Will try the advice given here tomorrow.

    A rad that's hot on the bottom and cold on top has water circulating through it. The top is full of air.


  • #8
    carveone
    Registered Users, Registered Users 2 Posts: 1,306 ✭✭✭carveone


    jca wrote: »
    I think the pipes airlock, his system is on its last legs tbh there are leaks everywhere.

    Just my 2 cents - my Dad and my brother both had similar problems and both were airlocks. It can be the devil finding them - my Dad had to let a lot of water out to get it to clear. The brother figured out there was an airlock in the boiler pump itself - there's some sort of vent on the top of the boiler for that purpose. I only mention it because you could go nuts trying to figure out what's happening otherwise!


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