Rinnai is one of the most trusted brands in the market for tankless water heaters. The company was able to build a solid reputation through the years and has been a favorite for many discerning buyers. Nonetheless, regardless of its superior quality, it is inevitable that there can be problems experienced. Lucky for you, most of these problems are easy to handle, even on your own.
If you want to know the basics of Rinnai tankless water heaters troubleshooting, read on and learn from the things that I will be sharing. I will try to cover as many problems as possible. With a little time and patience to spare, the problems of your tankless water heater can be easily resolved, even without a helping hand from experienced technicians.
Common Problems and How to Solve Them
Below are some of the issues that you might experience and the initial courses of action that should be undertaken:
No Instant Hot Water: When you turn on the shower or the faucet, it is normal that the first few drops of water will be cold. Allow a few seconds for the water to heat up. In this case, no troubleshooting is necessary. All that you have to do is to wait.
No Ignition: This is a common problem that you might experience when you are using a gas tankless water heater. First, check the gas type and the pressure, making sure that they are correct. See it as well that the gas line does not have air. Check the wiring connections and see to it that sparks are created by the ignition system.
Flame Failure: This is another problem that is common when the water heater is powered by gas. All of a sudden, the heater may lose flame, and hence, there will be no more hot water. The flame rod, power supply, and board wirings are some of the things that you should initially check.
Overheating: When the unit overheats, it is possible that you are using the wrong type of gas. The safety circuit wiring can also be loose or damaged. The thermal fuse can also be blown, which results from being exposed to extremely high temperature that the fuse finds impossible to handle.
Overtemperature: If there is an overtemperature warning, the first thing that you have to do is to shut down the unit. It is possible that there is short cycling caused by low flow. The presence of foreign materials in the heater can also be the source of the problem. In worst cases, you might need to replace the heat exchanger.
Noisy Motor: There are some instances wherein you can hear the fan motor producing an annoying sound. One of the reasons is that there is debris that you have to remove. Loose and broken wirings can also be the culprit. The fan may be unable to turn freely as well if it is already damaged.
Poor Flow Rate: See to it that there is no dirt or debris that cause clogs on the water’s way out. In some instances, the problem is not with the heater, but with your water line. See to it that there is water straight from the source.
No Water: If no water flows out after turning on the shower and the heater, make sure that the water inlet filter is clean and not clogged. The pressure relief valve also needs to be checked. Make sure that there is supply of water from the source.
Not Heating: If the water is not getting hot, check the supply of electricity and make sure that it is suitable to the requirements of the heater. You should also verify if the right type of gas is being used and see if there is still a supply of gas. Check all the wirings and see to it that there are no loose connections.
Leaking: Check all the connections and fittings. See to it that they are secured. Examine the source of the leaks and once this is determined, it will be easier for you to identify the best way to solve the problem.
Fortunately, with most of the newer models of Rinnai tankless water heaters, there is an innovative diagnostic tool. The unit displays an error code and once you see the error code, it will be easier to determine what is the problem and how to fix it.
With the Rinnai tankless water heaters troubleshooting tips that have been mentioned above, I hope that it is now easier for you to solve the common problems. At the end of the day, however, if the problem is too serious to be handled on your own, do not hesitate to call a licensed technician.