Posting a message to the forum will remove the above advertisement
  1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.
  2. Checkout our Plumbers Insurance area - heavily discounted Public Liability Insurance and Van Insurance specifically designed for plumbers.

Discuss Honeywell 3 port diverter snag? in the Central Heating Forum area at UKPlumbersForums.co.uk.

  1. John Armstrong

    John Armstrong New Member

    G'Day fellers. Appreciate your help please:

    When my boiler fires up it heats the water and radiators regardless of what is selected. I'm guessing that this means the valve is not moving from the de-energised position?

    Its a Honeywell V4073A. The manual/auto lever moves freely both ways and will not latch in the man position. A test I found which involves turning the heating (only) on, holding the lever on manual then turning water on to check the valve motors across, did nothing.

    A quick look under the cover shows the springs are OK and no sign of burning. The system was drained and refilled 6 years ago.

    Over to you!
     
    Last edited: Feb 20, 2019
  2. Last Plumber

    Last Plumber Trusted Plumber GSR

    When you turn the power off at the Heating isolation, does it close?

    How competent at Electrical work are you?
    Do you have a multimeter and know how to use it?
     
    • Like Like x 1
    • Agree Agree x 1
  3. John Armstrong

    John Armstrong New Member

    No it doesn't.
    Basic but safe. I'd be happy to replace a powerhead or a synchronous motor
    No I don’t...

    Here’s something that may be relevant:
    All the pipes are now cool but the unit itself is still quite hot!
     
    Last edited: Feb 20, 2019
  4. Rob Foster

    Rob Foster Top Contributor!!

    I would wait until the cold weather has really gone ...then have a play , sounds like a new head. Rob Foster aka centralheatking
     
  5. Harvest Fields

    Harvest Fields S. Mod Trusted Plumber GSR Top Contributor!!

    2 hour job max if it is the whole valve Rob.
     
  6. John Armstrong

    John Armstrong New Member

    Sure, but the question is : Do I need to replace the whole valve with associated system drain?
     
  7. Riley

    Riley S. Mod Trusted Plumber GSR Top Contributor!!

    Associated system drain? Are you asking if you can get away with just changing the head?? I would do the lot.
     
    • Informative Informative x 1
  8. Harvest Fields

    Harvest Fields S. Mod Trusted Plumber GSR Top Contributor!!

    Depends on the age of the valve?
     
  9. Matchless.plumb

    Matchless.plumb Trusted Plumber GSR Top Contributor!!

    Sometimes worth changing in full and perhaps replace like for like
     
  10. Last Plumber

    Last Plumber Trusted Plumber GSR

    I would power off, test that it's off (pull a fuse and use a voltage tester). Remove the motor and check it over. They are normally fairly stiff to turn the cog beneath but will move. if it's jammed, replace it. They can be bought from DIY stores and are fairly cheap.
    It could well be the head or valve but it is worth checking the condition of the motor first.
     
    • Agree Agree x 2
  11. John Armstrong

    John Armstrong New Member

    Ok, so remove the motor and see if the spindle can rotate:

    If it doesnt, buy a new one. If it does, assume a problem with the electrical supply?

    Anyone worried by the housing being hot when the pipes are cold? Would this indicate a motor trying and failing to move the valve? Wouldnt this just burn out the motor?
     
  12. Last Plumber

    Last Plumber Trusted Plumber GSR

    It will do that if the motor is stuck. Eventually it would burn out.
     
    • Agree Agree x 3
  13. Riley

    Riley S. Mod Trusted Plumber GSR Top Contributor!!

    Hence I’d change the whole thing
     
    • Agree Agree x 1
  14. John Armstrong

    John Armstrong New Member

    But you’re a plumber! ;)
     
    • Funny Funny x 2
  15. townfanjon

    townfanjon Trusted Plumber GSR Top Contributor!!

    Oh I love a “ max” quote when you have never seen the job lol
     
    • Agree Agree x 1
Loading...
Similar Threads - Honeywell port diverter Forum Date
On site now. Can I wire a honeywell 3 port in here? Plumbers Arms Mar 13, 2019
Honeywell Products Now Available - Excellent Prices Plumbing Forum Mar 13, 2019