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Discuss Honeywell Valve Not Working in the Central Heating Forum area at UKPlumbersForums.co.uk.

  1. heatservice

    heatservice Member

    If your electrican confirmed that 240v is going to the motor but the valve is not driving open then you can change the complete actuator without having to drain down.
     
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  2. S.P.S.

    S.P.S. GSR

    I’m not being funny, as had been previously mentioned. A heating eng or electrician (who actually knows central heating wiring..) should be able to give you a definitive answer in less than 5 minutes.. I know you know and trust your electrician dearly, but if they do not understand central heating wiring, or have much experience working on, then how do they know what to test for? That doesn’t have any bearing on them as an electrician, this is control wiring, electricians I know, trust dearly and work with on projects week in week out, don’t like to touch control wiring...!

    Something is either not wired right, or is not functioning correctly, both of which will be very evident when checked...

    Stu
     
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  3. Chalked

    Chalked Plumber GSR

    Honeywell valves don't operate the end switch in manual mode Shaun. It needs the motor to get the extra distance. ( or a conveniently placed screwdriver.
     
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  4. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    ta will remember the hack :D
     
    • Funny Funny x 1
  5. firemant

    firemant Plumber GSR

    GM, you have got completely the wrong idea ref the valve operation. So does, it seems,your Sparks and your plumber.
    The valve motor will turn when energised. It will close the m/switch, which (being permanently at 240V) sends the power to the boiler. Manually opening WILL NOT close the MS, but leaves the valve open. When your heating is fired, the HW will get hot. I assume that is what is actually happening.

    As has been said, it is basic. I guarantee that I would find the fault inside 5 minutes. I cannot see where you have confirmed there is 240V at the valve motor. Is there 240V at the MS? If there is 240V at the MS, has this been tested across L&N?
     
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  6. heatservice

    heatservice Member

    Please let us know the outcome thanks
     
    • Like Like x 1
  7. firemant

    firemant Plumber GSR

    Just noticed that I did not write the above correctly. One cannot edit the posts, so

    I meant to say:
    If there is 240V at the MOTOR, has this been tested across L&N? (as opposed to a neon screwdriver etc

    Is the motor driving, when energised, at all
     
  8. G M

    G M Member

    Hi,

    Sorry for the delay. I've checked this myself and can confirm that the valve is receiving 240v. So either it's a fault with the motor, or it isn't wired properly, so won't operate. I took a picture of the Nest box and it looks a little strange. As you can see from the picture below, I have drawn a red circle around numbers 4 and 5. Although there is cables connected to this, there is nothing connected at the other end in the junction box. There is a brown wire sort of hanging but not connected to anything. I can take a few more pics if it helps. Thanks!

    20180427_170347.jpg
     
  9. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    Wired wrong

    4 is no heat/no call best get it wired by a pro
     
  10. Harvest Fields

    Harvest Fields Trusted Plumber GSR Top Contributor!!

    6 is call for heat for hot water
     
    • Like Like x 1
  11. G M

    G M Member

    Oh! Then it definitely isn't wired up correctly. Should I move them one step to the right? Here's the other end of that cable in 4 and 5. It literally isn't connected to anything. I don't know if it has come loose or what, but surely this is the reason why it is working? Now the question is, where do I connect these? Thanks a lot for the help. Really appreciate it!

    wires1.png
     
    Last edited: Apr 27, 2018
  12. ShaunCorbs

    ShaunCorbs S. Mod Trusted Plumber GSR Top Contributor!!

    no best to get it re wired
     
    • Agree Agree x 1
  13. Harvest Fields

    Harvest Fields Trusted Plumber GSR Top Contributor!!

    You cannot do that job over a forum or the phone mate. Looking at the picture of the junction box it doesn’t look wired in as standard. Needs a clued up heating engineer to wire it in correctly. I know you wasn’t happy before when I/we questioned your sparky and engineer but sadly our experience tells us that this is quite common. Hope that you get sorted mate
     
    • Like Like x 1
  14. G M

    G M Member

    Thank you. It wasn't necessarily folk questioning the electrician; it was the comment that said get a new electrician and plumber without any reason why. That comment wasn't really of any use however, once the reasons were explained, it made more sense.

    Thank you. I'll just have to get someone you specialises with heating and themostats in particular and go from there. At least we now know what the cause is (hopefully). Thanks to everyone for your input!
     
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  15. Harvest Fields

    Harvest Fields Trusted Plumber GSR Top Contributor!!

    Where about are you in the world?
     
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