Takagi T-K2 Error Code 11
I have had my Takagi T-K2 for 3 years and love it. But lately there has been a problem with it failing, giving error code 11. The machine fires about 10% of the time, but after it fires once, it fires fine for most of the day. But at night and in the morning, it always fails.
I have talked to Takagi support twice and had my gas company come out to check the pressure gas pressure (which was fine - 9 inch WC).
Here is what I know. When hot water is turned on: the fan turns on OK; the igniter sparks OK (best to check this in the dark); and it sounds like the gas switch turns on OK (ie, it "clunks").
Despite all of this, the flame does not light!! The machine repeats three rounds of igniter sparking, then gives up and reports error 11. If you try this 5-10 times, eventually it will light, work just fine, and continue working for the rest of the day.
When thinking about the issue, the obvious things can be ruled out. The gas pressure is fine; the gas line is sufficiently large (3/4" from the meter 10' away); the burners look perfectly clean, with no visible dust or grime when looking through the opened ignition plate hole. I also have been vigilent about descaling the heat exchanger and cleaning the water filter once a year.
I will continue to discuss this with Takagi customer service, but any constructive input from this group would be helpful.
takagi tkd20 fails to light or quits intermittently
We have a TKD20 exhibiting similar problems. Sometimes it starts up but quits 10 seconds to 10 minutes later. Then it flashes either an 11 or 12. With Takagi phone assistance, I have cleaned the flame sensor, done the big burner cleaning project (it was clean to begin with!), replaced the flame sensor/ignitor panel. Problem continues. Quite often it will not light at all. The ignitor glows blue for a few seconds, there's a click, but no gas comes on. It does this three times, then gives error code.
Gas company came out and checked pressure (6.5). There is no drop in pressure when the Takagi lights. There was no change in pressure when the Takagi shuts itself down.
This has been going on for months now, and we are so tired of taking turbo showers - afraid that we won't get the shampoo rinsed out in time!
Would love to hear a solution. I'm calling Takagi again tomorrow. If we find a solution, I'll be sure to post it here.