Cold Radiator

Discussion in 'Plumbers' Talk' started by T1m149, Dec 5, 2017.

  1. T1m149

    T1m149 New Member

    Hi All,

    Need some help before a call a pro !

    I have a rad that just wont heat up.

    So far i have tried :-

    Bleeding (no air)

    Balancing ( Works but wont stay hot, all upstairs rads approx 1/4 turn open downstairs rads 1/2 turn open)

    Removed rad and flushed ( dirty but not enough )

    Changed the rad and valves as it was a bit tatty anyway ( works but cold the next day )

    Connecting a pipe and valve to the bleed port ( gurgles, works but cold the next day only draw off minimal amount so FE tank wont drain )

    All other rads are working fine so I don't think its the pump.

    Any suggestions?

    Thanks for reading !
  2. kiaora

    kiaora Well-Known Member

    Turn off all rads except the problem rad, will it get and stay hot?
    Maybe **** in system or balance or pump issue

    Big blockage, valve faulty/ turned off!
    Of if long run to rad, pump?
  3. T1m149

    T1m149 New Member

    Hi Peter.

    Yes tries that.
    Rad Did get warm but not hot as you would expect it to, and it took ages to get warm.
    Boiler registered a over heat fault .
  4. KIAB

    KIAB Well-Known Member

    Bit of a crud blockage somewhere.

    What boiler you got, how old is it, & do you have a magnetic filter on system.
  5. T1m149

    T1m149 New Member

    It's a Worcester Bosch 30 cdi ..about 5 yrs old.
    No filter on the system
    Last edited: Dec 6, 2017
  6. The Teach

    The Teach Well-Known Member

    Has that radiator actually worked ?

    Was that radiator an addition to the existing system ?

    The boiler is relatively new,is the heating system same age ?

    These are a few of the questions that would be asked during an on site visit.Sounds like the supply pipes to that radiator are either severely restricted due to blockage either crud or mechanical restriction or incorrect supply pipe installation.

    The supply pipes would need to be revealed to enable heat progress checking,sometimes its quicker/cheaper to run new flow and returns to that radiator from known good source of heat.

    A straight forward job for an experienced heating technician :)
  7. KIAB

    KIAB Well-Known Member

    Heating technician:eek: posh word for plumber!:D
  8. T1m149

    T1m149 New Member

    To be honest the rad has always been been a little hit and miss, but i always managed to get it working.
    I too suspect blocked feeds.
    I can get to the feeds form the room above, so that is an option as is an alternate feed.

    Heating system in 15 yrs old and this rad is an addition when the kitchen was redone 3 yrs ago.
  9. KIAB

    KIAB Well-Known Member

    Want to add Sentinel X800 cleaner via the F&E tank, it won't remove a solid blockage, but it will loosen the crud very effectively, but you do need a magnetic filter fitted to system to collect the crud.
    Can recommend the Magnaclean Pro 2 filter.
  10. T1m149

    T1m149 New Member

    I've already got system cleaner in it .
    would disconnecting the valves and then checking the flow, prove anything ? as there is certainly flow.
  11. KIAB

    KIAB Well-Known Member

    Pointless putting in cleaner unless you have a magnetic filter fitted to collect the crud dislodged.

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