Not again...

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  • johnna
    Automated Home Jr Member
    • Oct 2006
    • 20

    Not again...

    having replaced the three way valve and renewing the water pump and both isolation valves, my system worked, for a fortnight.

    It is again refusing to power-up despite the manual fire-up procedure being followed...
    Turnining the three way manually has no effect.

    Running the hot tap does spark up the pilot light.

    It is a Potterton 40F.

    When I press the pilot light trigger button, I can hear the boiler go 'Whhooo'- is it haunted? LOL!

    The boiler front face gets hot to the touch. Could it be an internal stat problem?

    The system is well bled too.

    All help gratefully accepted.
    Johnna
    I resemble that accusation...
  • sunbeam
    Moderator
    • Feb 2006
    • 261

    #2
    is nothing working,

    no hot water or central heating.

    Comment

    • johnna
      Automated Home Jr Member
      • Oct 2006
      • 20

      #3
      Ah, sorry I didn't make it clear.
      Hot water does work on the timer and the heating pilot light only comes on and stays on when the hot water is set running for a period of time.
      I resemble that accusation...

      Comment

      • sunbeam
        Moderator
        • Feb 2006
        • 261

        #4
        room stat turned up?

        Comment

        • johnna
          Automated Home Jr Member
          • Oct 2006
          • 20

          #5
          The room stat is a bit of a mystery... It has no scale to show what is high and what is low.

          We seem to have little joy at either end of the scale, the room stat is a Potterton Myson item too. PRT100.

          Should I swap this too?
          I resemble that accusation...

          Comment

          • sunbeam
            Moderator
            • Feb 2006
            • 261

            #6
            i would link it out first.

            Comment

            • johnna
              Automated Home Jr Member
              • Oct 2006
              • 20

              #7
              Link out the stat???

              Oh proper terminology! I assume this would mean shorting two terminals thus causing the stat to be constantly on???

              Do I get a prize?

              Sorry for being dim, but a bit of extra guidance would be gratefully recieved.
              I resemble that accusation...

              Comment

              • sunbeam
                Moderator
                • Feb 2006
                • 261

                #8
                that's it johnna but if your not sure i'd get someone in to have a look.

                Comment

                • johnna
                  Automated Home Jr Member
                  • Oct 2006
                  • 20

                  #9
                  I have shorted the terminals in the room stat to by-pass the switch within.

                  No change has been noticeable...

                  Should I now be looking at the boiler and it's internal stat or its motherboard???
                  I resemble that accusation...

                  Comment

                  • gasman
                    Automated Home Lurker
                    • Feb 2007
                    • 5

                    #10
                    Originally posted by johnna View Post
                    I have shorted the terminals in the room stat to by-pass the switch within.

                    No change has been noticeable...

                    Should I now be looking at the boiler and it's internal stat or its motherboard???
                    no johnna what you should be doing is paying a corgi registered engineer to carry out these tests . Instead of trying to save a few quid and possibly electrocuting yourself or blowing yourself up.Youre house insurers wont pay out if you damage youre property or youre neighbours.These sites are giving out dangerous non accurate information.

                    Comment

                    • johnna
                      Automated Home Jr Member
                      • Oct 2006
                      • 20

                      #11
                      Thanks for that ham fisted explanation of regulations and legality.
                      Ever wondered what has caused me to be asking these questions in the first place??? No doubt you are fully aware of the poor servicing and high bills I have received from Corgi registered operatives already... oh! You aren't? Well shut it then.


                      I know my limits, but I also want to know exactly what my difficulties are before I consult someone to repair them.


                      So does it sound like an internal stat or motherboard problem?
                      I resemble that accusation...

                      Comment

                      • sunbeam
                        Moderator
                        • Feb 2006
                        • 261

                        #12
                        i've just had a thought johnna,

                        it's not a potterton suprima 40 is it?

                        does the boiler go to lock out after a few minutes?

                        Comment

                        • gasman
                          Automated Home Lurker
                          • Feb 2007
                          • 5

                          #13
                          Originally posted by gasman View Post

                          no johnna what you should be doing is paying a corgi registered engineer to carry out these tests . Instead of trying to save a few quid and possibly electrocuting yourself or blowing yourself up.Youre house insurers wont pay out if you damage youre property or youre neighbours.These sites are giving out dangerous non accurate information.
                          it does not sound like an internal stat or pcb fault as the boiler is merely a heat source,and is firing up to provide hot water.so the fault must be on the controls.I would be looking at the 3 port valve again ,i know this sounds strange but even the new ones can develop faults .

                          Comment

                          • NeilUK
                            Automated Home Sr Member
                            • Jul 2005
                            • 71

                            #14
                            Do you have access to the installation guide for the boiler? Many have decent fault-finding lists that can take you step by step through a series of tests to help identify the problem. If it only rules out the simpler faults then at least you are better equipped to explain what you have done if you have to call in a plumber.

                            Comment

                            • johnna
                              Automated Home Jr Member
                              • Oct 2006
                              • 20

                              #15
                              Sunbeam wrote:
                              "
                              it's not a potterton suprima 40 is it?

                              does the boiler go to lock out after a few minutes?"

                              It is a Potterton Prima f40 and it does seem to lock out, but I'm not 100% sure that I know exactly what that is.

                              Neiluk, I have no list of fault codes, but I know where the diagnostic port (four ports) is and I have a multimeter. Would I need a special code reader, or does it use flash codes?

                              Thanks fellas!
                              I resemble that accusation...

                              Comment

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