Takagi Jr. Error code 12

Discussion in 'Tankless Water Heater Forum' started by Bernie Mac, Jun 6, 2010.

  1. Bernie Mac

    Bernie Mac New Member

    Messages:
    2
    Location:
    CT
    My tankless has been working fine for the past 5 years, until 2 nights ago we had no hot water (error code 12). So I reset the system and this morning I had no hot water... again it read error code 12 again!!! So I decided to do some research and found this great forum.

    BTW I have city water.

    Based on the info I got on this forum I turned the power off, cleaned the air mesh/filter, I also removed both flame sensors and cleaned them with a scouring pad; however as I was removing the sensors there was a a fiber-glass like gasket that disintegrated in my hand (so I guess I need to order one) the other issue and BIGGEST CONCERN is that there is a hole about a 1/2 inch wide, on the left side of the sensor that now has a fairly decent FLAME COMING OUT OF IT every time the heater is in use!!!

    Any advice???

    Thanks

    B
    Last edited: Jun 6, 2010
  2. Lightwave

    Lightwave New Member

    Messages:
    98
    Location:
    Vancouver, BC
    Unexpected flames in gas appliances are never a good thing.

    Turn off the gas to the heater and call a plumber.
  3. Bernie Mac

    Bernie Mac New Member

    Messages:
    2
    Location:
    CT
    I wouldnt say there unexpected. There is a plasitc that covers the viewer that prevents heat from escapaing. I guess that it fell at some point. I couldn't find it. Ordered both sensores, gasket and the plastic thingy for about $35 from Takagi.

    I will keep you all posted.
  4. Brian H

    Brian H New Member

    Messages:
    1
    Location:
    BC
    Code 12,
    Just cleaned my igniter for the second time in 6 years of having the T-KD20." Love this unit " Looking at the life span of the fiberglass seal around the ignition panel/sight glass I was informed that this unit has been discontinued. Any Idea of a parts place for this unit ?
    One thing I do regularly is remove the igniter and blow the residue off the burners that the gas leaves behind. Very low air flow from a plastic straw. You can see the difference in the diffusion of the flame after cleaned.
    Cheers
    Brian
  5. Scott D. Plumber

    Scott D. Plumber In the Trades

    Messages:
    67
    Check your gas supply. Have you been paying your bills? Did you let the LP run out?
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