I have a Rinnai tankless RC80HPi water heater. The error codes from the above were taken from the manufacturer instructions, so troubleshooting Rinnai becomes easier and convenient for readers of this website. Getting regular maintenance will catch or prevent other tankless problems. As long as everything is working properly (e.g. When a standard tank-style gas water heater stops producing hot water, it means that the gas burner is no longer producing the flame necessary to heat the water. Is there an error code on a remote control or unit's display and you need help to understand it for the successful troubleshooting? Aquarium heater helps control the water temperature for your fish on those super-cold days. It was installed in my house back in 2009. Electric water heaters are high-voltage appliances, which means you should take full precautions when working with one. It may be due to a blocked orifice, a problem with the thermocouple or a dirty vent. I have a Rinnai tankless water heater that was installed about a month ago. If error code reappears, unplug sensor and fire up the water heater. There are some more … Start by checking the circuit breaker to see if it has been tripped. By increasing the flow rate, the problem can be solved. In 2006 I gushed all over my new Rinnai tankless water heater that was going to save me all kinds of money and run both our domestic hot water system and our hydronic heating system. If you have a gas heater, check to see if the gas valve is open. He says the unit is not producing any codes but the display reverts back to 108. If planning to do it yourself, use the following suggestions carefully. My new water heater does not heat water. The time it takes to deliver hot water from the heater to the tap depends on the length between these two points. If it has, it’s an easy fix – simply turn it off and turn it back on again. If the water heater is new, or if you’ve just moved into a new home and aren’t familiar with the water heater’s capability, it’s likely that the unit is undersized. you have hot water on demand), there is no cause for concern. 3. As odd as it may sound, this is not an unusual problem. If you have a corroded tank, it will need to be replaced entirely. Possible reasons for water taking a long time to heat include faulty heating elements, sediment build-up on the elements and a faulty thermostat. After all, it heats water on the inside and has many layers of insulation to keep that heat from escaping. Do you have a problem with a Rinnai tankless water heater? Sometimes water heaters and pipes can make sounds through normal expansion and contraction due to heat. Ensure that there is no blockage in the vent system (lack of combustion air). There are two screws that the controller wiring is held in place by they are like thermostat wires. Your water heater should never be hot to the touch. Beating the drum in favor of tankless water heater is not over amused. The electric water heater was turned off at the circuit breaker panel. He doesn't get any hot or warm water. My tankless water heater is not working. Check each of these in turn and replace as necessary. Our insight can guide the way for you. Why Is My Heater Not Working? Rinnai Tankless Water Heater Troubleshooting Manual WARNING There are a number of live tests that are required when fault finding this product. I’m considering going with solar so it’s good to read about problems I may face. When heaters get too hot, then this feature shuts off the device for safety purposes. Rinnai tankless heaters are equipped with the "Scale Control System" that provides a limescale and corrosion protection. If you have no hot water, there are several possible reasons, and you need to work through each of them methodically to eliminate each one – and this will also depend on whether you have an electric or gas-powered heater. If you have a heater with a tank, it may simply be that your tank is not big enough for your requirements. If your water heater is hot to the touch then go through each of the items listed above as to why it might be happening. You could also have air in the gas line, or the gas valve could be faulty. However, with the combination of heat, water and all the various components that make them work, inevitably, problems still occur. Auto safety shut off. The hot water may be getting blocked somewhere in the pipes between the water heater and the fixtures. But if the temperature of your water is too hot, pressure builds to dangerous levels inside the water heater, risking an explosion. Once connected and the free Rinnai app is downloaded, the Rinnai Tankless Water Heater can be … Extensive knowledge and skills are needed for any gas, plumbing, electric and tankless work, so it is in your best interest to contact a licensed technician. Another quick fix is to check the thermostat – you may just need to turn it up to a higher setting. Some homeowners find the heater not working when they need to heat their house. Your water heater should never be hot to the touch. There are many types of water heater, including those powered by gas and those powered by electricity. You’ve paid your gas bill (your tankless water heater can’t heat water without a steady gas supply!) Any issue that is recognised will flash with a fault code. Not bad article. Check #10, #11 and #12 below to see how to address these issues. Also, remember safety first. Your truck’s heating system consists of many different parts, and if even one of those parts is damaged, you can end up with cold air coming out of your vents. In all cases, tankless water heaters must be property vented. I turned it back on. If you have no problems using your shower or operating a dishwasher or washing machine but can’t get hot water to run a bath, the problem may be due to the type of heater you have. One of the reasons for the plumbing crossover is if the single-lever mixing … Are all electric elements properly grounded and does the gas valve have short circuits? These fault codes will show on your digital, or status, monitor of the hot water temperature controller. Make sure the power is turned off before doing anything involving the heater’s electrical components – this means turning off the breaker for your heater in the service panel. Many fish lovers, me as well, may know how useful this heater is, but sometimes, we might confuse if the aquarium heater is working or not. After 3 hours there is no warm or hot water coming out of any of the faucets or showers. Water heating is the most significant energy users among other activities of a house. An absence of hot water generally occurs as a result of all the hot water in the tank being used up--for example, by running both the washing machine and dishwasher at the same time. Flushing your tank can help, or you can try boiling the water to maximum temperature to kill all the bacteria. The hot water may be getting blocked somewhere in the pipes between the water heater and the fixtures. CAUSE: Another reason for electric heater not working could be due to the auto safety shut off feature which is provided in several heaters these days. This post is about Rinnai tankless water heater troubleshooting because that’s the brand we install the most often, but we have deep experience with all brands of tankless (on demand) water heaters. By increasing the flow rate, the problem can be solved. Some more good information on hotwatercylinders.nz. The unit must have the minimum flow reached, otherwise, even with the slightly lower water flow than the minimum required you might have the problem. This is also important to do: check the length of the venting system, ensure that the water heater is using the right gas type, check that the pipes are appropriately sized... Bath Fill function is disturbed after the power outage. Troubleshooting Rinnai water heaters are much easier if they come with the diagnostics system. If there is no flame, use some of these tips for troubleshooting: check the loose connections and the proper voltage on the power supply, PC board, and igniter. If you feel warmth, your water heater is probably working. Showers and other applications don’t require such a high flow of water, so the water will be heated as you expect. Gas Hot Water Heater Troubleshooting - Article Topics Gas Hot Water Heater Pilot Light. So, by knowing this, The problem of venting or air supply. The problem could be that your heater is not powerful enough for your requirements. Check your water heater to make sure the pilot light is still on (check your owner’s manual if you need helping finding the pilot light, as it is well hidden). Three or four months ago my water heater pilot would not stay lit so I replaced the thermocouple and my problem was solved. You’re using hot water faster than it can make it. Possible reasons for water taking a long time to heat include faulty heating elements, sediment build-up on the elements and a faulty thermostat. While the water sits in and is heated by your water heater… All the wiring should be without damages and connections must be tight. We look forward to working with you! Your water heater vent is unobstructed (be careful—these are usually located on the roof) The gas valve feeding your tankless unit is turned ON, not OFF. When it comes to broken heaters, there are several common problems that could be the culprit. May be because of this feature your heater may not be working. 3. Check each of these in turn and replace as necessary. If your tank is too small for the number of people showering, for example, you may use up all the hot water before everyone is finished. Units that are equipped with the remote controller such as the MC-91-2 will provide the most recent diagnostics information and allow you to react immediately by recognizing the error code and following the troubleshooting guide. Test the igniter and see is it still working. How to Turn on a Water Heater (12 Precautions to Follow), 13 Common Reasons Why Your Water Heater Making Noise, 9 Common Reasons Why No Hot Water (Tips to Fix). If the problem occurs, you will notice the error codes LC0-LC9, which represents the scale build-up problem inside the heat exchanger. You may need to consider upgrading to a more powerful unit. My Rinnai tankless water heater MC-91-1US does supply hot water. How to Fix: Confirm no loose, damaged, or broken connections on the leak detector. There are some more … You’re using hot water faster than it can make it. Check the internal elements and plumbing for leakage. If you have a tankless heater, you may be trying to run too many fixtures for the unit’s power, so check how many fixtures your unit is rated for. This is a dangerous situation, and you will need to replace the valve immediately. Check your water heater to make sure the pilot light is still on (check your owner’s manual if you need helping finding the pilot light, as it is well hidden). We are the Sydney solar hot water experts. Tankless heaters also have to work harder in winter, so if you experience this problem during the colder months, this could be the reason. The water flow for running a bath, on the other hand, is much higher, and your tankless heater might just not be able to keep up. Is there any way to remedy? Tankless water heaters are not immune to problems. However, if that is not the cause of the problem, it's not difficult to troubleshoot your water heater to locate the issue. If the water heater is new, or if you’ve just moved into a new home and aren’t familiar with the water heater’s capability, it’s likely that the unit is undersized. Many issues are not fatal for your heater, and the key to repairing them is correctly identifying what’s wrong. Water flow might be reduced when the water filter or fixture aerator are clogged. sites, A detailed guide on how to troubleshoot error code 10 is here. If it lights but then goes out, the causes could be similar. Leaks from water heater tanks can be … Ensure that burner is not clogged and that the flame is stable with the light blue color. This includes checking the loose connections, damaged wiring harness and removing the deposits from the electrodes. It doesn’t matter if you want to learn how to put together a gorgeous yet relaxing family room. Not bad article. Checkpower supply (Plug another appliance (ie hairdryer) into power point and test. Check to see if the water will now heat. If a controller is fitted check that it is on also) Check gas supply (Turn gas stove top on then turn hot water tap on. Unplug the unit and then remove the cover. For more detailed information on troubleshooting an electric water heater, watch the video below: Again, if you don’t have enough hot water, the reason why will depend on the type of heater you have. Then all of a sudden while trying to run hot water in either of the showers or in the kitchen sink, the hot water would start cycling between cold and hot. […] Reply. I turned it back on. Check the resistance of the fan motor, that it is turning freely and there is no damaged wiring or loose connections. The unit must have the minimum flow reached, otherwise, even with the slightly lower water flow than the minimum required you might have the problem. Also, to repair any of the problems such as those shown in the above error codes, a  licensed professional should be contacted. Open the panel and press the red “reset” button. Some of the error codes can be done only by the professional. Not Enough Hot Water. Three or four months ago my water heater pilot would not stay lit so I replaced the thermocouple and my problem was solved. Tankless heaters heat water as it flows through, giving you a never-ending supply of hot water on-demand. If this doesn’t work, try cleaning it out with chlorine bleach. At the same time, the water heater is such an important device responsible for brings happiness and comfort to the homeowners. This is the simplest and easiest hot water problem to fix. I got a call from a customer that I'm going to go see this afternoon about a Rinnai water heater that won't make hot water. If you have a gas version, it could be related to the burner – see #12 below for further information. This problem can be a result of picking the wrong aquarium heater placement or fish tank heater light not on. There are a few reasons why a car heater may be on the fritz—it depends on the nature of the problem. If you ignore the problem, it will only get worse and will probably end up costing you more later. For more reasons on why it is not working please click this link Top reasons why your solar water heater is not heating. In all cases, tankless water heaters must be property vented. However, if that is not the cause of the problem, it's not difficult to troubleshoot your water heater to locate the issue. Make sure that fan is operating correctly, that a sensor is not damaged or wire connection is lose. This article will show you the most common error codes and problems found in almost all Rinnai water heaters, non-condensing and condensing. If the water flow in your tankless water heater is too low and dips below the flow activation rate, the main gas burner will turn itself off. Make sure that problems such as those found when dealing with the error code 14 are resolved. Then a few weeks ago the pilot started periodically going out, so I got another thermocouple. Tankless water heaters are not immune to problems. Replace the element if it is needed. An absence of hot water generally occurs as a result of all the hot water in the tank being used up--for example, by running both the washing machine and dishwasher at the same time. Another cause of hot water not being hot enough is sediment buildup in the water heater tank. If your model features a standing pilot, the pilot light will not … There’s nothing to worry about. Gas Water Heaters. If it won’t light in the first place, it could be due to the pilot light orifice or tube being blocked – or it might just need replacing. If the leak comes from the tank, this is more serious since it may be corroded. Toward the end of this period, your water heater is likely to heat less efficiently. Unfortunately the Infinity 24 is not listed as a compatible system for this controller and it's not working. Did you pay your gas bill? Water that enters your water heater tank often carries dissolved minerals as well as small amounts of sand and other debris. The only solution for this is replacing the tank. Clean or replace the heat exchanger if it is dirty, has the scale build-up, there is debris burning, or it is damaged. Since a tankless water heater won’t store the pre-heated water all the time instead heats the water at the moment, it takes a little time. How to Reset Rinnai Tankless Water Heater Rinnai Water Heater Not Working after Flush Descaling In Use Light. Increase the water flow if it is too low. While we always welcome feedback and questions, we have compiled some resources that you will find helpful in operating and servicing our products. They are both continuous flow water heaters but the Rinnai efficiency is the latest generation of water heater with an efficiency of 95%, compared to 80 % of the Rinnai INFINITY. We look forward to working with you! Use the same approach as with other sensors above. Failure to do so can result in a serious injury or even death. If there is plumbing crossover, cold water is mixing with the hot water, so the temperature of the outgoing water is reduced. Another problem associated with every tankless unit is the temperature fluctuation, associated with unstable or low water flow. If no leaks found, wipe out any water inside cabinet, dry off leak sensor, and restart unit. However, with the combination of heat, water and all the wiring should be at... Time, the solution can be solved that the vent system is not and... 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