Friday 11 October 2013

Dettol Soap Dispenser Repair

The following describes the "repair" of a Dettol no-touch soap dispenser, which was producing too much soap then flashing the red light.

https://docs.google.com/file/d/0B43XXiSt0MIdTFZGS0hqc3J6QWs/edit?usp=sharing

The root cause is that the design is not tolerant to the high voltage provided by good quality fresh batteries.  A diode was inserted in the circuit to ensure it works with fresh batteries.

Disassembled Dettol Soap Dispenser showing PCB
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16 comments:

  1. Unknown5 November 2014 at 16:59

    Hi Adrian,

    Got your blog searched out, when I was looking for similar troubles in my dettol no touch.

    1. I have checked the voltage of each of the 4 AA cells using a multimeter, it is around 1.49 each.

    2. Strangely enough my unit is showing erratic and random behaviour, with all batteries loaded up, it sometime does not turns on for no apparent reason. I have double checked the battery polarity and cover fitting in place. Then once in a while it does activates with initial 5-6 blinks of the red light.

    3. When i bought it a month ago or so, it was working fine and only dispensing one dose of the liquid soap (with new stock batteries from the box), however suddenly it is behaving too much of a spendthrift. In one time , it now gives a full 3-4 doses and full cycles of the pump and motor inside, hence the liquid soap just keeps pouring out, finishing the stock for 2 weeks in 2 days.

    4. I have already tried cleaning the sensor. I am not an electronic techie at all to sold a diode as shown in your guide.

    5. Is there any other fix for a regular joe like me, which can be done to save my capital investment.

    Thanks for your reply.

    You can write to me directly at syed.faisal@gmail.com

    ReplyDelete
  2. SA3 January 2015 at 09:37

    Yeah! It dispenses thrice at one time... I have stopped using it... It's wasting lot of soap... Pls help and kindly let me know the problem directly at my mail - sforsakshi@ gmail.com

    Thanks

    ReplyDelete
  3. Guru19 September 2015 at 01:53

    Hi
    Which diode are you using? I am going to order one, but I don't know which v or amp should I use?
    Thank you.

    ReplyDelete
  4. Guru19 September 2015 at 01:54

    Hi
    Which diode are you using? I am going to order one, but I don't know which v or amp should I use?
    Thank you.

    ReplyDelete
  5. Ade22 September 2015 at 13:36

    Not sure but any silicon diode that fits would be ok. e.g. 1n4148 / ll4148
    I think the design has been fixed now so it's easier to buy a new one! They are very cheap.

    ReplyDelete
  6. Unknown14 February 2016 at 09:40

    I have disassembled it and the gears are loose. Bed to get the gear configuration please

    ReplyDelete
  7. Unknown14 February 2016 at 09:42

    I have disassembled it and the gears are loose. Bed to get the gear configuration please

    ReplyDelete
  8. Unknown22 May 2016 at 00:50

    recently my dispenser started working in reverse direction. Instead of pouring the liquid from inside to outside, I can observe the liquid level getting increased slightly for a moment while usage and nothing comes out of the outlet. Batteries are having correct polarity. Any idea about solution?

    ReplyDelete
  9. sonia26 October 2016 at 04:30

    Hi there is a problem in my dispenser.it tell me how its sensor works.it is working continously.I am unable to stop this.which ia its function.

    ReplyDelete
  10. sonia26 October 2016 at 04:31

    Please tell totally working of this.

    ReplyDelete
  11. nalinchawda2 December 2016 at 06:59

    the red light in front does not flash in my unit .It has stopped functioning .Rest of the mech side i find ok .Any sugesstions please .

    ReplyDelete
  12. nalinchawda2 December 2016 at 07:33

    the red light in front does not flash in my unit .It has stopped functioning .Rest of the mech side i find ok .Any sugesstions please .

    ReplyDelete
  13. Abhinav Kumar Sahai27 December 2016 at 02:38

    My soap dispenser works for few days with Duracell only. What could be the reason. Less than a month.

    ReplyDelete
  14. TDL Hygiene6 April 2017 at 14:27

    this is nice blog ad it is very informatics and Very good looking blog. Best hygiene dispenser manufacturer

    ReplyDelete
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    ReplyDelete
  16. Ishan Sharma20 December 2021 at 08:27

    Great Post Thanks for Sharing!

    Bathroom Faucets

    ReplyDelete

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