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Hi - I have a Rinnai Convector 406 gas heater which is 2 years old. Yesterday, it started cutting out with an error code of "12" showing in the display. It can be re-started but only stays on for a few minutes. What is the problem?

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I believe the 12 is the error code for "incomplete combustion". In this case you will want to start with the thermocouple. If you are not handy at these things I would call a service tech. You can find a service person on their website.

http://www.rinnai.us/

Posted on Jun 16, 2008

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Hi, my heater was converted to natural gas yesterday. it works for about 5 minutes then cuts out, flashing the number 13


The Error Code 13, indicates a combustion fault. In other words, the heater is not lighting properly. This may be a problem with the conversion from one gas type to another. Particularly, if not all things were reset for Natural Gas. It does require a service call to check and repair the problem.So, whom ever did the conversion for you, owes you a service call.

Hope this helped you. Please let me know. Cheers

Jul 06, 2011 | Rinnai Heating & Cooling

1 Answer

Our Rinnai convector unflued room heater won't start. Lights just flash heat never comes on.


According the the Owner's Manual for your Rinnai Convector Heater, there are 8 things, than can cause what you described. Two of which can be discounted, unless you just had the heater installed.

I have provided a link to the Owner's Manual, that you can download and print for future reference. Please pay close attention to Page # 6 -Pre-Service Check List and Fault Finding. Each problem listed has a troubleshooting solution.

http://www.rinnai.com.au/images/stories/operating_instructions/Heating/Portables/Granada252/portable_radiant_convectors.pdf


Hope this helps you to further troubleshoot and solve the problem. Please let me know. Cheers!

Jun 17, 2011 | Heating & Cooling

1 Answer

Our Rinnai C85 tankless water heater is used for radiant heating. During the heating season it will occasionally throw a "12" code and cut out. It will reset and run for several days. Technician...


Sorry to read about your problem, I hope this helps you out.

Ok your code 12 is a gas issue, or this listed below

Check that the gas is turned on at the water heater and gas meter. Check for obstructions in the flue outlet.
Ensure gas line, meter, and/or regulator is sized properly. Ensure gas type and pressure is correct. Bleed all air from gas lines. Ensure proper Rinnai venting material was installed. Ensure condensation collar was installed properly. Ensure vent length is within limits.
Verify dip switches are set properly. Ensure appliance is properly grounded. Disconnect keypad. Disconnect EZConnect or MSA controls to isolate the problem. Check power supply for loose connections.
Check power supply for proper voltage and voltage drops. Ensure flame rod wire is connected. Remove flame rod and check for carbon build-up; clean with sand paper or emery
cloth. Disconnect and reconnect all wiring harnesses on unit and PC board. Check all components for electrical short. Check gas solenoid valves for open or short circuits. Remove burner plate and inspect burner surface for condensation or debris.

your manometer levals should be around 3-4

if you are running other gas appliances, like pool heater

I tried to help you. Please help me and Rate/Vote on my response. We take the time to answer your question's. take the time to rate us.Thanks and good luck

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Jan 04, 2011 | Heating & Cooling

1 Answer

OUr Rinnai gas heater convector 516tr keeps on turning itself off and flashes 12 on the light panel. What does that mean and how to fix it? tks


Hi.

12 flashes means "Incomplete combustion". The code is prompted when the flame turns off because of a problem.

Check filter, check gas pressure and thermocoupling. Those are the problem that commonly trigger the code 12 error.

Here a manual.

Here Fixya thread on the problem.

Sep 06, 2010 | Heating & Cooling

1 Answer

My Rinnai 606tr Silent Server continually shuts down and the number 12 appears on the display screen. What's up ?


I know that this is an old post but i had this same problem and i cant find a single answer to this problem anywhere on the net. Rinnai couldnt even give me an answer (let alone even call me back)

Well I figured it out. If you go onto Rinnai's website, you can download the manual, which has the codes and what they mean. Code 12 means Flame Failure. Still this didnt tell me enough. After taking the thing completely apart twice i finally figured out that the heater itself was perfectly fine.

The gas line was the problem. My gas line has a check valve on it right next to the heater. The check valve was not letting a consistent flow of gas to the heater because the heater was drawing too much gas at times, causing the check valve to start to close because it thought there was a leak (so to speak).

All i did was turn the gas valve behind the heater so that it was closed more (not letting as much gas flow through) so that it wouldnt trip the check valve. the heater now works fine and keeps a consistent temperature with no problems.

Jan 05, 2010 | Rinnai EnergySaver 556 Air Conditioner

1 Answer

Rinnai 556 ftr keeps flashing code 12


Hi

Thanks for using FixYa. Error code 12 on a rinnai 556ftr means Flame failure. Check gas is turned ON.
Also see this error manual.

Please refer to this user manual for more details --

Rinnai 556ftr User manual

Please do rate the solution & revert for further assistance.

Thanks
Rylee

Jul 29, 2009 | Rinnai EnergySaver 556 Air Conditioner

1 Answer

After 1 min,it signals and blow the cold air.


sound like a high limit problem check any filters

May 07, 2009 | Heating & Cooling

1 Answer

Have new Rinnai R94LSI tankless water heater during startup the burner wll come on for about 1-2sec.then stop and gives me a erroe code 12.


Hi!!! you seem to have a bad flame sensor..but you could have so many errors with this heater its unbelievable call rinnai at 1-800-621-9419..good luck..

Jan 04, 2009 | Heating & Cooling

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