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
This worked perfectly... as my plumber sat and read them manual, i found this solution, showed him, we did it and it totally fixed the problem! Thanks for posting!
Super helpful. I could not find this solution in the installation or Service manual. Could be really frustrating if you perform other fixes but don't know about this final step.
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SOURCE: 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
SOURCE: Tankless water heater not meeting the need
Yes the faucet could be a problem. Try changing for one which you know is ok.
The long run of pipework - each bend, elbow or joint all have a reducing effect on the flow, maybe enough to matter with a restricted outlet. none of this can be altered except by renewing with larger bore pipe - expensive!
Also there should be a dirt filter in the mains water input line/pipe. Try removing & cleaning. Try also removing , reconnecting and then the hot tap [faucet]
The boiler will have an actuator valve which fires it up when a certain flow of water is reached. If the flow is reduced AND the valve is worn, maybe a replacement. Not sure about it's USA construction but in the UK [it's called a diverter valve] many have a rubber diaphragm which is cheap to replace
Check also if it uses a flow sensor switch
Had a look at the Takagi web site and there are pdf's of manuals
takagi.com
Overall I am still thinking that the main prob is in the flow.
Hope I've helped - come back anytime
Rod.Davies
SOURCE: tankless on demand water heater.
Tankless water heaters normally take a little longer than a regular heater to provide hot water because they have to start and get warmed up. I'm guessing the heater uses a pilot light and that the short amount of hot water when you turn on the tap is hot because when the water is sitting still in the heater the heat from the pilot light is enough to get it hot. The tub faucet will get hot a lot faster than the shower because it lets a lot more water through and empties out the pipes faster than the shower. You could probably speed things up by letting the tub faucet run on completely hot for like 10-15 seconds and then turning on the shower.
SOURCE: Hello, i have a Takagi
Hi,
Not sure if you have the manual for that so here it is.....
http://www.takagi.com/download/product_manuals/T-M1.pdf
It however does not mention how to reset that code...to reset it I know that you need to push a specific set of buttons on a specific order...i do not know what they are or the order...
They are supposed to have full time customer support... here is the page for the numbers..you will have to call them for the reset code as it is not public knowledge...
http://www.takagi.com/?p=contact_us.php&page_id=7
heatman101
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