home water boiler (indicator boil & warm)

Discussion in 'General Electronics Chat' started by sangpo, Sep 21, 2013.

  1. sangpo

    Thread Starter Member

    Aug 17, 2013

    i a 2 liter Thailland made water boiler which is old but still working, except the indicators.

    It boils water and it keeps warm. But boil indicater and warm indicator does not work.

    2 months before it had taken to repair shop, after that indicators does not work. To take back to same repairing shop , it is too far so I dont want to. Also I want try it by myself. Since Im learning basic electronic

    So today I have open it to see. I found 2 or 3 wires left not connected. I have no idea.

    I will be very grateful if any one of be kind enough to give me wire schematic (drawing)

    Thank you

  2. sangpo

    Thread Starter Member

    Aug 17, 2013
    I tried and tried, now the LED which is designed for indicating the water is boiling is now working. But when water is boiled (hot enough) the LED (designed for indicating warm) is not glowing. How do i fixed that?

  3. wayneh


    Sep 9, 2010
    Can you supply a photo? It is very hard to guess what you are doing.
  4. THE_RB

    AAC Fanatic!

    Feb 11, 2008
    Those type of "coffee urns" usually have a thermostat switch, with changeover contacts.

    When it gets hot enough the switch toggles over, and turns OFF the main boil element, and turns ON the "keep warm" element.

    If the switch works it will boil, then click sound and will run the smaller element (and "warm" LED).

    You need to say if the switch is working, and the elements. Then we will know if it is a switch/element issue or just a blown LED indicator.
  5. sangpo

    Thread Starter Member

    Aug 17, 2013
    Thank you all who have given me idea and suggestions. Finally I manage to fix it. It was bulb problem.

    Thank u all
    ErnieM likes this.