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  1. G

    Grant oil boiler hunting

    Just replaced programmer and, fingers crossed, all going well. Had CH and HW on for 15 minutes and just turned off CH and waiting to see if MPV is working correctly. Will check screws. Good reminder. Thanks Thanks to you all.
  2. G

    Grant oil boiler hunting

    I'm a locksmith so swapping capacitors is not an everyday task. Will pick up programmer on Monday. If the problem remains I will swap back to old one and keep the new one for when its needed. I will share the results on here. Fingers crossed.
  3. G

    Grant oil boiler hunting

    The nature of the fault with the programmer in the above video is very similar to mine. I found a second video that is encouraging me to buy a new programmer rather than replacing capacitors etc. in the existing. I think a new programmer is a good place to start as if that is not the problem...
  4. G

    Grant oil boiler hunting

    I tried the cyl stat right down with CH running and still have cyl being heated. Seems folk are associating the hunting problem as common with the programmer. As a layman am I right in thinking that as boiler 'can' operate normally, must the problem be with the programmer or MPV.
  5. G

    Grant oil boiler hunting

    Thinking I might try replacing either the actuator on MPV or programmer. Of the 2 options I fancy replacing the Programmer first. If problems continue I could replace actuator. Is this the wisest way to go.
  6. G

    Grant oil boiler hunting

    boiler on but CH and DHW off 1 - N no V 7 - N no V both give less that 0.01 Volts (you are referring to terminal 2 Neutral and not terminal 6 Burner Neutral) Can't find the wiring centre terminals. Are they in programmer ? I just noticed that with CH on, boiler working OK, the cyl feed from...
  7. G

    Grant oil boiler hunting

    Sorry for slow response. Will try your suggestions tomorrow morning and let you know.
  8. G

    Grant oil boiler hunting

    What diagram are you looking at ?
  9. G

    Grant oil boiler hunting

    1. Live 2. Neutral 3. Earth 4. Burner Lock out 5. Burner Earth 6. Burner Neutral 7. Burner Live Just off out for a couple of hours. When back I'll have another look at diagram. For me its hard enough when everything is working normally.
  10. G

    Grant oil boiler hunting

    just 7 terminals
  11. G

    Grant oil boiler hunting

    Thanks John. No rush. Really grateful for the help and enjoying all the learning.
  12. G

    Grant oil boiler hunting

    Yep. That looks right. Happy to repeat any
  13. G

    Grant oil boiler hunting

    above was HW and with CH 2(N) - 1 240v constant 2(N) - 4 all over the place 2(N) - 7 240v constant
  14. G

    Grant oil boiler hunting

    2(N) - 1 240v constant 2(N) - 4 all over the place 2(N) - 7 random figures as low as 6v and up to 180v I don't have a room stat just TRV on rads.
  15. G

    Grant oil boiler hunting

    I left meter on for over 10 secs for each of the 3 tests 2(N) - 1 240v constant 2(N) - 4 all over the place. Probably about 58. is most consistent reading 2(N) - 7 240 through cycles. Shows OL for split sec when switching back on
  16. G

    Grant oil boiler hunting

    Sorry, not clear, already done photo.
  17. G

    Grant oil boiler hunting

    I have install manual with wiring diagrams but the quality of my pics, on here, are not very clear. Heres one to test if clear enough
  18. G

    Grant oil boiler hunting

    had already done MPV was hoping that would be the case with removing actuator.
  19. G

    Grant oil boiler hunting

    no click and no motor whirring. Can I manually set lever to required position but I guess that won't help identify a problem to do with actuator.
  20. G

    Grant oil boiler hunting

    what noise am i listening for - click, motor hum ???
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