![]() ![]() These troubleshooting tips should help you in case this message returns and are helpful with solving the issue. Many other components of a Rinnai heater can be the source of this error code. This way, if you face any issues, you will know how to navigate them.Įrror code 12 can exist and not be related to problems with the flame rod. The best thing for an owner to do is to be prepared. While the system is durable and has longevity in mind, sometimes things can happen. For this reason, homeowners should familiarize themselves with what the errors mean and how to troubleshoot them. You cannot ignore any error code on a Rinnai Tankless Water heater system. The water heater then returns to normal, and the error zeros out. Resetting your Rinnai is done by pushing the two switches labeled A and B on the electrical board simultaneously for five seconds. Sometimes, depending on the model, they can be found on the remote control. The Rinnai error codes are =located on the control panel. Also, before anyone services, the water heater, electrical supply, water, and gas should all be turned off. Replace the electronic board and gas valves in this case. Sometimes the components can wear out or be faulty. Examine components for electrical shorts regularly. Cables should be connected tightly, without damage, and be dry. To work efficiently, tankless water heaters require proper grounding. Homeowners often use a shop-vac to remove the garbage from venting systems. Rinnai tankless water heaters have several delicate and advanced components sensitive to build-up, contamination, and condensation. Cleanliness matters because it ensures the gas can burn clean and exhaust gasses are safely vented to the outside of the house. Venting systems, combustion chambers, intake exhaust, and fan blower all need to be kept clean. If exhaust gases come from the back of the system instead of venting out, improper gas combustion can occur when you see a reddish-yellow burner flame with an unstable pattern. Error code 12 may appear if the venting contains components not approved by the company, loose connections, or is the right venting size, have the proper clearance, or is the wrong material. ![]() They must follow the specifications, code, and instructions for proper installation. Recirculation of Exhaust GasĪn expert should perform unit installation and venting. If the igniter or rod has a carbon build-up, use fine sandpaper and cloth to clean it. The flame should be clear and blue with a stable pattern. The rod itself needs to come into contact with the flame to ignite to heat the water. They should be attached to the electronic board and the flame rod. Wires should not be damaged, frayed, or broken. Some Rinnai systems will have two, while others have one flame rod. They shouldn’t be misplaced or come loose. The ignitor and the flame rod are attached to the mounting bracket. If there is a crack/damage in the ceramic sleeve, replace it. Broken or Disconnected Flame RodĮxamine the flame rod to see if it has become disconnected. Only a professional can bleed the air from the gas pipes. If, however, the gas line contains air, you will need to have it emptied. You will get a Rinnai error code until you deal with the problem. Once power is restored, it doesn’t power up like most appliances. In the event of a power outage, the system shuts down. Interruption of Gas/Power FailureĪ power failure causes an interruption in the gas supply necessary for the tank to function properly. Ensure that you use the right fuel type according to the manufacturer’s specifications for your hot water system. Not the Proper Gas TypeĪ Rinnai tankless water heater uses propane or natural gas to run. Improper sizing causes the gas system to become undersized (insufficient regulator and smaller diameter), leading to an increased pressure drop than what is in the specifications. Check to see you have the proper inlet pressure and if the system is meeting the minimum amount necessary. These are usually on a label attached to the heater. If you are unsure of what that is, check the specifications of your water heater. The water heater needs the proper amount of gas to function. If the system uses propane, make sure there is an adequate amount of gas in the tank. Inspect all gas line valves on the water heater to make sure they are operational and that the gas pipes are not closed. Your system may generate this code for many reasons. While it could be a flame error code, a flame rod may not be the actual source. If the system doesn’t have a control panel, you can find the error on the remote controller. You can view this error code from the control panel where you set the temperature. An error code 12 means there is no flame or flame failure within the system and that the tank is not registering a flame in the combustion chamber. Error code 12 is found on most models, like the RU, RL, V, and RUR series of water heaters. ![]()
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