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My takagi water heater has a code 10

Then a code 99 blinking

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  • Water Heaters Master
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CALL YOUR LOCAL PLUMBER FOR HELP

Posted on Feb 21, 2019

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Posted on Jan 02, 2017

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SOURCE: Takagi Jr Flash Water Heater

explain your problem.
Takagi is a great tankless heater, very few problems...

need more info

Posted on Aug 09, 2010

  • 1 Answer

SOURCE: My Takagi T-M1 water heater

I HAD THE SAME PROBLEM. I CONTACTED TAKAGI WHO SENT OUT THE REPLACEMENT PART. AFTER INSTALLING THAT PART, IT WORKED FOR A MINUTE AND STOPPED. I CONTACTED TAKAGI ONCE AGAIN AND WAS TOLD "OH, THAT MOTHERBOARD GOES OUT SOMETIMES IF THAT FIRST PART GOES BAD!" THEY THEN SENT OUT A NEW MOTHERBOARD WHICH FIXED THE PROBLEM.

Posted on Apr 07, 2011

silawrence
  • 906 Answers

SOURCE: How can a trouble shoot a flash water heater. Make Takagi T-K3

The heater elements have a broken heating element. if you have a multimeter keep it close to the hearer. when it fails again disconnect the wires from the heat element and set the meter on diode check with the sound on. put the lead wires as one on each terminal you took the wires off of. if the meter does not make a sound, the element is dead

Posted on Dec 19, 2014

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1 Answer

Takagi t-k3 runs hot on low to med flow on high turns cold & flame shuts off


OMG 95 PSI is too high a pressure for a tankless! What was the W.C. in inches on the manometer?
Also on a T-K3 12 isn't a Code but a partial Code. You need an R/C to make this easier as counting led flashes produces wrong codes.
you'll have to find the correct code it's throwing not a partial.
And put a Pressure Reducer on this to below 60 PSI. 95 PSI is only impressive when it blows the tubing out after a few years.
Call Takagi in California not A.O. Smith in TN and they'll help someone fix this

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No hot water


This indicates a reduced supply of water to the heater. Check water flow through the tap has not been reduced If so, check filter area

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991 error code on a Takagi T-K3 Flash gas tankless water heater


Re- set code!!!!
We have a Takagi TH3 DV 540 model.Air intake got blocked with snow, condensation etc.Once we cleared that then you just have to re-set it to clear the 991. On our model there are 4 tiny buttons across the bottom (Take off front cover) to find them. of the computer board assembly bottom left corner. Push the two buttons on the right simultaneously hold for 15-20 seconds or so, then turn the Takagi off then on again- should work now!
If you have a different model then those buttons will be in the bottom left corner still but running vertically- try doing as above with the bottom two buttons. We had to go without heat and hot water for 2 days until we could get hold of someone to tell us this. We called Seneca Supply 716-852-4744. Good luck

Apr 22, 2012 | RTO Takagi T-K3 Flash Gas Tankless Water...

1 Answer

My Takagi T-K jr. keeps flashing an error code 21....the water turns cold and we shut it off ....wait a few...then turn it back on....works for a little then wil flash again...have replaced the pressure...


In my case, the error code 21 was caused by the failure of the vent fan to run-on after shut off (easily verified by listening to the unit). The problem was not resolved by swapping either the fan or the control unit with another heater. I talked to a local service tech who had a couple of suggestions. One was to move DIP switch #6 to the upper position. After doing thisit will be necessary to re-initialize the controll by cycling power off and on. This fixed the problem. I emailed Takagi tech support to ask if I should consider this as permanent fix, or if there was something else I should do. Since I got no reply, I'll pass on the tech's other suggestion: buy a Rinnai.

Mar 27, 2011 | RTO Takagi Jr. TK-JR-N Tankless Water...

1 Answer

My Takagi T-M1 water heater is not functioning. After less than a minute of operating it stops and the red light in the front is blinking.


I HAD THE SAME PROBLEM. I CONTACTED TAKAGI WHO SENT OUT THE REPLACEMENT PART. AFTER INSTALLING THAT PART, IT WORKED FOR A MINUTE AND STOPPED. I CONTACTED TAKAGI ONCE AGAIN AND WAS TOLD "OH, THAT MOTHERBOARD GOES OUT SOMETIMES IF THAT FIRST PART GOES BAD!" THEY THEN SENT OUT A NEW MOTHERBOARD WHICH FIXED THE PROBLEM.

Mar 18, 2011 | RTO Takagi T-M1 Mobius Gas Tankless Water...

1 Answer

Code 991 continues to show.. will not clear... how do we clear that code???


to clear the 991 Takagi code, simultaneously press the bottom 2 grey buttons of the four just to the left of the flashing LED light. When the LED stops flashing, release and then press the reset button on the black panel about 8 inches above that

Jan 17, 2011 | RTO Takagi T-M1 Mobius Gas Tankless Water...

1 Answer

Takagi Jr Flash Water Heater Problem


explain your problem.
Takagi is a great tankless heater, very few problems...

need more info

Aug 04, 2010 | Ultra Max Takagi Flash TH-1 Ultra High...

1 Answer

Pilot fires then quickly shuts off how do I pull a code on a Takagi T-K2?


Pilot must heat the thermocoupler a couple of minutes before letting go of the button. The coupler controls the main valve.

Jun 12, 2009 | Ultra Max Takagi Flash TH-1 Ultra High...

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