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RTO Takagi T-K3 Flash Gas Tankless Water Heater Questions & Answers
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
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
Turn on power,15-20 seconds later,get
Hi,
First things... you have checked the inler filter andthe gas pressure, but have you checked and cleaned the thermistor(s)??? Also the flame sensor... clean that with a soft cloth...
Next turn down the temp with th dip switches that should tell you if it is the high limit...
Has the unit been cleaned with vinegar or CLR lately or ever??? there maybe buildup internally in the unit...
Is the flame a nice blue color or is it yellow???
Does it go out just before the unit cuts out???
Do the flames lift from the burner???
These are all things that I would be checking if I was coming to your home to check this unit...
Comment back with any other questions or comments...
heatman101
Pilot goes out when dialed back to on
no I dont think you have a mother board. If there wasone it would be in a box of some sort on the top or right near the top mounted on the side.
If you replaced the coupler, I would say the gas valve is bad. Go to you local supply store and get a new valve. you should have 3 connection on the valve, the main gas feed and the main burner and your coupler.
Make sure you turn off the water at the main, drain it all down and when you have all the connection moved get a large channel lock or pipe wrench and turn the valve counter clock wise use tape or dope on the section that goes into the tank and tighten it up, hook up your other pipes and test for gas leak with soap and water.
Make sure when you buy the valve you get a match to the kind of gas you have natural or L P one will not work with the other.
OH check for gas leaks
Best of luck Tom
9/8/2011 6:36:16 PM •
RTO Water...
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Answered
on Sep 08, 2011
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