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Thread: Takagi T-K2 Error Code 11

  1. #16
    DIY Junior Member wbull55's Avatar
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    Jul 2009
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    DC Metro area
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    Quote Originally Posted by wbull55 View Post
    I have a 4-year old T-K2 that is starting to have the same issue as the first post. My assumption is dirt since I haven't cleaned the unit since it was installed. (What can I say? If it ain't broke don't fix it. Plus I have a whole house water filter.) I'll post what I find out.
    It took me awhile to fix. I started with cleaning the fire box. Then the symptoms were as if the flame sensor was not working. It would spark and light off but after a few seconds it would it would shut-down amd recycle. So I replaced the flame sensor and ignightor since I noticed the gasket was torn and missing 1/2 inch of material. Same problem but when it did light and I gave the unit a high demand it would blow itself out. So the tech on the phone told me it was probably a gas supply problem. They were right. I replaced the gas supply line since it was undersized and got new high flow ball valves and replaced the pressure regulator. It's working fine now.
    Last edited by wbull55; 08-17-2009 at 12:50 PM.

  2. #17

    Default Wish I would have thought of that.

    :-):d:d:d:d

  3. #18
    DIY Junior Member Gregerathome's Avatar
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    Seattle
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    RESPONSE TO: "It took me awhile to fix. I started with cleaning the fire box. Then the symptoms were as if the flame sensor was not working. It would spark and light off but after a few seconds it would it would shut-down amd recycle. So I replaced the flame sensor and ignightor since I noticed the gasket was torn and missing 1/2 inch of material. Same problem but when it did light and I gave the unit a high demand it would blow itself out. So the tech on the phone told me it was probably a gas supply problem. They were right. I replaced the gas supply line since it was undersized and got new high flow ball valves and replaced the pressure regulator. It's working fine now."

    I have read through this entire post and everything mentioned previously exactly mirrors my experience with a KD-20. My installer and I have done all of the recommended fixes mentioned here, usually with only temporary success.

    We have proper sized gas lines and when we checked pressure we got readings of close to 7" WC and and just over a 1/2" drop when the KD-20 kicked on. Thinking that the regulator at the gas meter was flakey, we had it checked but it received a passing grade by the Gas Co.

    Which is the more likely scenario: 1) I have a failing gas control valve in the KD-20, or 2) I have a failed regulator at the gas meter and the Gas Co. guy was ducking a repair?

    Overall, I like the way my HW system works (when it works!) but after only 4.5 years of service, I'm considering switching back to a gas tank heater.

  4. #19
    DIY Junior Member Roof Pro's Avatar
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    Apr 2011
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    Macon, Tennessee
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    Default Fix for Code 11

    I have a Takagi t-m1 and had all of the same issues posted in this thread. I have power, flow, ignition great gas pressure. Long story short there are 2 fuse wires that wrap the the burner can at the top of the unit this is the part where the high limit switch is located. check the continuity of the white fuse wires. On ours the upper or longer wire checked to have none confirmed by making jumper wire to by-pass and unit works perfect. Cold showers are very motivational.

  5. #20
    DIY Junior Member atpl53's Avatar
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    Toronto, ON
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    Quote Originally Posted by Roof Pro View Post
    I have a Takagi t-m1 and had all of the same issues posted in this thread. I have power, flow, ignition great gas pressure. Long story short there are 2 fuse wires that wrap the the burner can at the top of the unit this is the part where the high limit switch is located. check the continuity of the white fuse wires. On ours the upper or longer wire checked to have none confirmed by making jumper wire to by-pass and unit works perfect. Cold showers are very motivational.
    As a certified Takagi installer and service tech, that is the issue in over 90% of our service calls. It took many frustrating and angry hours on the phone with Takagi to find a solution.

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