Hi, we have a Rinnai 516TR. After the heater has been on a short while it stops and flashing a error message of "12" on the display. Nothing in our user guide says anything about error messages. We're lost and are sick of getting up every 5 mins to turn the heater back on! Help!
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Re: Rinnai Heater - error message "12"
An error code of 12 on your heater means a flame failure has occured. It could be the following: Flame Rod dirty, Obstruction in burner, improper gas pressure, or a bad ignitor board. I am suggesting you get a technician who is familiar with Rinnai products to check out the above items.
I fix Toyo's which are related to your heating unit. When a Toyo Laser 30 has an error code of 12, it means that the screen in the back is plugged up with lint, dust, or something causing the unit to over heat. A screen with what appears to be a little fuzz can be a significant clogging of the cooling air passive design of the system. Look for a lint screen and try cleaning it! Also, check out any info is the book about screen filters, fan shrouds etc in case your wording is diffrent. Toyo Tech
I get this problem from time to time. It makes no sense. It happens randomly, and if I shut it off and turn it back on it comes right back up. Unfortunately this doesn't give us any peace of mind when leaving the house in the winter for a few days, or even when going to sleep when it's in the teens or single digits at night.
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Try national energy they sell convestion kits It would need a gas fitter to do the work , you may need to a quote on this , they would be able to tell you if it is worth it ,its hard to tell with out looking at the heater .
Turn the heater OFF and unplug it from the wall. Remove the filter and reinstall it, making sure it's fitted properly into the heater. Wait 5 minutes and plug the heater back ion and turn it ON. You may have to reset the controls back to way you had them. Completing what you just did, should have allowed the heater reset itself and function as it should. If this sort of thing continues to reoccur, contact your local Rinnai Dealer for service.
Error code 12 on a Rinnai means the unit lit, sensed a flame but then failed to sense it some time later whilst in operation. Most commen faults causing this are gas regulator based on LPG systems. The regualtor fails to let enough gas through to continue powering the burner. I did have another where the guy had put a natural gas model on LPG supplies, you didn't say if this fault was on a newly installed sysyem or not!
One other cause (not so well known) is if you when you get a 12 immeadiatlyyou turn the tap on. This is caused by a short circuit on the low voltage side of the heater. I'm guessing you have controllers to display the error code. I've had a few where a bit of DIY work has put a nail though a wire supplying the controller and caused a short. The wiring is only 12 volt so it doesnt blow any fuses. If you do have controllers, get a qualified person to remove the front of the heater and disconnect the controller lead from the circuit board, see if this stops the fault. If it does, try and find the short in the wire (even had rats cause this in one location)
If this doesnt work get the technician to check the overheat loom around the heat exchanger, this is another favorite place for the wiriing to short.
The error code 12 normally refers to a flame failure/front flame rod did not sense any heat or ignition.
If you have turned off the heater and the message again pops up, it could be because of following things:
Flame rod couldd be bad
Could be possibilities of carbon being stuck.
A dirty burner or losse wire due to which the flame is not getting on burner quickly.
Next time you try your stove watch the flame. If the flame goes away and then the error code comes on, you have something wrong with the over temp circuit, gas or gas valve, If the code comes on and then the flame goes away you have a flame sensor problem.
Hi This is happening to us and I called Rinnai... they suggested that if anyone either in our apartment or an ajoining one has painted walls or varnished a floor that the convection heater picks up the smell and the only way to get rid of it is to burn it off by running the heater for several hours in a well ventalated room...