one cold radiator in the system

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  • philb
    Automated Home Lurker
    • Jan 2006
    • 3

    one cold radiator in the system

    Please can anyone help.

    I have a cold radiator upstairs and all the others are working fine. The pipe to it is also cold. I have checked and it does not need bleeding.
  • toscal
    Moderator
    • Oct 2005
    • 2061

    #2
    Re: one cold radiator in the system

    If you turn off some of the radiators does it get hot.
    Try balancing the system. see here http://www.diyfaq.org.uk/plumbing/rad-balance.html
    IF YOU CAN'T FIX IT WITH A HAMMER, YOU'VE GOT AN ELECTRICAL PROBLEM.
    Renovation Spain Blog

    Comment

    • philb
      Automated Home Lurker
      • Jan 2006
      • 3

      #3
      Re: one cold radiator in the system

      Hi we tried turning all the radiators off and it made no difference at all. Any other ideas?

      Thanks

      Comment

      • kundrik
        Automated Home Jr Member
        • Jul 2005
        • 23

        #4
        Re: one cold radiator in the system

        Just to be on the safe side, have you checked that BOTH valves on the rad are opened?

        Also you didn't mention if you have thermostatic valve fitted. Sometimes they get stuck.

        Comment

        • philb
          Automated Home Lurker
          • Jan 2006
          • 3

          #5
          Re: one cold radiator in the system

          Hi Both valves are fully open(Anti clockwise) the valve on this is a TRV 2 way Myson unsure whether this is athermostatic valve or not. If it is how do you get them unstuck?

          Thanks

          Comment

          • toscal
            Moderator
            • Oct 2005
            • 2061

            #6
            Re: one cold radiator in the system

            Many thermostatic valve work on the wax expansion method. Many of the bodies of these valves can be unscrewed, leaving the actual valve mechanism still attached to the radiator. If you get this far, you should see a small rod protuding from the center of the valve. Use a pair of pliers and gently try to move the rod up and down. Put the valve body back on and it should work.
            Or befor you put the body back switch on the heating and see if by moving the rod the rad gets hot.
            If it works try and have a go at balancing the system. Try balancing the system. see here http://www.diyfaq.org.uk/plumbing/rad-balance.html .
            Good luck.
            IF YOU CAN'T FIX IT WITH A HAMMER, YOU'VE GOT AN ELECTRICAL PROBLEM.
            Renovation Spain Blog

            Comment

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