Dimplex Opti-Myst fires

Discussion in 'Electrics UK' started by Neil B, 13 Feb 2010.

  1. Lilly7874

    Lilly7874

    Joined:
    3 Dec 2020
    Messages:
    1
    Thanks Received:
    0
    Country:
    United Kingdom
    Hi I have Dimplex GOS20 Electric Fire only used the actual heater on it twice, last night the heater decided to switch off, thought it had switched off due to the thermostat control on it, tried the heater again this morning and still not working, any ideas what it could be or what I need to replace,just ran out of guarantee last month thanks
     
  2. Sponsored Links
  3. winston1

    winston1

    Joined:
    11 Jan 2010
    Messages:
    7,342
    Thanks Received:
    572
    Location:
    London
    Country:
    United Kingdom
    Is that the one year manufacturers guarantee? If so that is in addition to your legal rights under the Consumer Rights Act which gives you 6 years protection in England and 5 in Scotland.
     
  4. Pitch182

    Pitch182

    Joined:
    29 Nov 2020
    Messages:
    2
    Thanks Received:
    0
    Country:
    United Kingdom
    Just for info, I installed some 20w amber mr16 lamps along with 2 x 2w amber led lamps. There is still enough heat to cause convection enabling the mist to rise. Power consumption is down from 180w to 44w. Must less heat produced around the lamp holders which has got to be a good thing.
     
    Last edited: 12 Dec 2020
  5. Sagaris1987

    Sagaris1987

    Joined:
    22 Dec 2020
    Messages:
    1
    Thanks Received:
    0
    Country:
    United Kingdom
    This thread has been really helpful but unfortunately all the tips haven't helped me fix my issue.

    I have a opti-myst stove. Problem is when I switch it on the lights come on, then after 30 seconds the mist kicks in but then immediately cuts out and the lights switch off too. I've recorded a video here if it helps

    You can hear the click at 30 seconds, see the water starts bubbling, mist starts and then it beeps and cuts out.

    I've replaced the transducer but it hasn't helped. The mist fan doesn't start spinning at any stage.

    Any ideas? Not sure what to try next. Could the fan have gone and cause this or a bad connection somewhere maybe?
     
  6. SithLordHood

    SithLordHood

    Joined:
    31 May 2020
    Messages:
    24
    Thanks Received:
    0
    Location:
    UK
    Country:
    United Kingdom
    I thought i would share my experience:

    Purchased a Opti-Myst fireplace back in Dec 2019.
    Ran for a week or two, noticed the bulbs (and the water tank) get very hot during use!
    After reading somewhere (may have been on here) they suggested changing the 50W halogen bulbs for 30(35?) watt bulbs to prolong the life of the tank and reduce energy consumption.
    Decided to chance it and I ordered 20W bulbs instead.

    These have worked flawlessly for the past year, not had any issues with the fire whatsoever.
    Used the fire quite a bit (only the flame effect mainly) and have cleaned it maybe three or four times in the last year, nothing major, just removing the white deposits from the plastic and cleaned the sump. My wife has a habit of leaving the fire on and it tripping itself off once the water has ran out.

    Using 20W bulbs does mean it takes a little longer for the flame effect to get going, but in my opinion it still looks fine, if this is the reason i am not having any issues then it's certainly worth the compromise.

    I'm finding the bulbs hard to come by though.. have managed to secure 4 off ebay, the previous supplier only seems to stock the 50W nowadays..
    The ones i use are 'Prolite Amber 12 Volt Halogen Dichroic MR16 20 Watt'
    [​IMG]

    https://www.easy-lightbulbs.com/light-bulbs/coloured-bulbs/halogen-reflectors/2-pin/m252-a-ca/?gclid=EAIaIQobChMIi5rs3dXw7QIVw7TtCh3lQALIEAQYASABEgIu0vD_BwE
     
    • Like Like x 1
  7. SoftTopGeek

    SoftTopGeek

    Joined:
    10 Jan 2021
    Messages:
    25
    Thanks Received:
    1
    Country:
    United Kingdom
    We have an Opty Mist, the Albany, since 2013.
    In December 2020, I searched for help with it, and found this site and thread. Wow!
    Having had the (what now seems like typical) problems, I thought I'd say what I have found:
    The heater always works fine (although not often used), so no issues.
    The LED log effect always works fine, no issues.
    The uplights work ok, now that I have replaced many of the lamps, and replaced all of the lamp holders. (They get really hot, so needed to replace the holders, and used the ceramic type).
    At some point, the magnetic switch stopped working, meaning that the water level in the sump wasn't detected, and the lamps and mist maker would never try to run. I changed this switch, with one bought from CPC, and then that part was ok.
    The little fan stopped at some point, and I discovered that this wasn't getting any power. I derived a DC supply from the AC supply for the lamps, along with a speed adjuster, and that all seems fine now.
    The big issue, was the mist effect.
    This worked great for the first few years, but then started to get progressively less consistent. Often wouldn't start properly, and then eventually even after an hour, would hardly do anything.
    We worked out that the sump would sometimes overfill, and that played havoc too. This was due to a tiny hole in the blue water tank, which I smothered in airfix glue to seal up. (Air was getting into the tank, so letting water out when the sump was already full).
    After trying all the tips with the must issue, (clean the disk, descale) our conclusion was that we needed to replace the transducer assembly. We bought it (very easily) from Mouser electronics.
    The mist maker, is a TDK module (circuit board and transducer).
    I googled NB-80E-01-H, and the Mouser catalogue number came up from there.
    It turned into a really easy fix, just taking out the old transducer and its control board from under the base of the sump, and fitting the new on in. I put a dab of silicone grease on the rubber o ring when fitting it back together, to reduce the chance of water passing by it.
    This was done on Cristmas eve 2020, and used everyday since, and each time has been fine.
    One of those fixes where you think - should have done that ages ago!!! We live and learn.
    Hope this helps someone with similar issues.
     
    • Thanks Thanks x 1
    • Like Like x 1
  8. Aworth

    Aworth

    Joined:
    29 Jan 2021
    Messages:
    1
    Thanks Received:
    0
    Country:
    United Kingdom
    Hi hope someone can help me. I have had my opti mist fire - DimplexCadogan CGN20 for about 9 years. It was working fine. But then I noticed the mist/smoke stopped working and fire started cutting out. When I checked the water was filling up where the transducer discs are in the sump which is why it was cutting out I think. Further investigation I noticed the fan isnt working either but not sure if I need to replace the transducer discs or the fan? Is there anyway to know which is the problem or should I change both? The bulbs still light up and fire still turns on if I don't have the water in there
    Can anyone help? Thanks
     
    Last edited: 29 Jan 2021
  9. Sponsored Links
  10. mdp1673

    mdp1673

    Joined:
    13 Dec 2010
    Messages:
    8
    Thanks Received:
    0
    Location:
    Nottinghamshire
    Country:
    United Kingdom
    Hello

    I’ve got the Piermont PMN 20 model and as everyone else on here it’s stopped misting. The transducer disc is knackered (pitted, black and flaking bits off) and the new disc types don’t work and for the life of me I can’t find anything similar.
    I’ve tried to get a replacement sump but they are out of stock everywhere.
    I have found this though https://www.mouser.co.uk/ProductDetail/TDK/NB-80E-01-H/?qs=4WjKNJoURz6KzK6vce58/w== which looks like it’s a replacement for the circuit board and transducer disk.
    Has anyone tried swapping this out - is it compatible?
    Ta
     
  11. mdp1673

    mdp1673

    Joined:
    13 Dec 2010
    Messages:
    8
    Thanks Received:
    0
    Location:
    Nottinghamshire
    Country:
    United Kingdom
    And it turned up, 5 minutes to fix and it’s working a treat.
     
  12. SoftTopGeek

    SoftTopGeek

    Joined:
    10 Jan 2021
    Messages:
    25
    Thanks Received:
    1
    Country:
    United Kingdom
    That is the module that I purchased for ours, and it has worked fine since. Hope yours does too.
     
  13. mbldn

    mbldn

    Joined:
    3 Jun 2021
    Messages:
    1
    Thanks Received:
    0
    Country:
    United Kingdom
    Hi guys, I bought a Dimplex Verdi:
    the mist and heat work fine, but the lights don't turn on at all. I received a new lamp base and transformer via warranty.
    I only managed to replace the lamp base (no change), but have no idea where the transformer goes?? Does anybody know how to open this thing?
     
  14. Martlea

    Martlea

    Joined:
    10 Jun 2021
    Messages:
    1
    Thanks Received:
    0
    Country:
    United Kingdom
    I've had my Dimplex optimyst blk heater since around 2012. The main issue I had just after warranty expired was corrosion of lamp holders. A new assembly cost an extortionate £80 and suffered same defect after a while. So like others I sourced ceramic holders for a few £'s and no now fit my own replacements from time to time. Also like others the myst effect is weakening now and so I face eithe trashing the fire or sourcing a viable new transducer to keep it a while longer.
    I am inclined to just scrap the thing and find a quality alternative particularly now new legislation may soon prohibit the sale of the colour halogen lamps needed for fire colour and the heat convection of the myst effect.
    Any suggestions for a reasonably priced log or coal effect replacement for this model?
     
  15. Andy-glide

    Andy-glide

    Joined:
    24 Dec 2016
    Messages:
    4
    Thanks Received:
    0
    Country:
    United Kingdom
    I have a CGN20 stove type Opti-myst which has now stopped working. About 2 weeks ago it started to emit a strange smell, something like damp clothes or a swimming pool not what I would say was a burnt component type smell. Any way I cleaned the sump and this seemed to reduce the smell and the fire worked fine. Then the halogen lamps became intermittent sometimes they would all start when the fire was turned on but on other occasions nothing came on. Now the fault with the lamps is permanent and nothing happens when the fire is powered.
    Tried cleaning the ultrasonic transducer but the failure mode is the same. Tested the water level sensor and that works fine with the fire beeping when the water level is low.
    Have ordered a replacement transducer but unclear is this is the issue as unsure if there is any feedback to the main control board that the sump unit is working or not.
    Yet to look at the lamp connections but cant believe all the holders have failed together but will investigate further.
    Interested to know if others can point me in a more likely direction as to the cause of the fault.
     
Loading...

Share This Page