You could ohm out all the solenoid valves, inspect the flame rods for the correct voltage, or even replace the gas control valve altogether. If necessary, replace the remote control, remote control wiring, or the PCB. Moisture can also build up in the water heater and the unit will also be connected to the plumbing system. If not, continue reading. Rheem error code 33 can occur if scale buildup is on the inlet valve water filter or other thermistors, damaged or bad wiring, and short circuits. Reason: The Control Board is not programmed. The vent exhaust can be a little more complicated to solve though you should start by simply checking and removing any obstructions to the exhaust vent. However, the error code helps you troubleshoot the problem when scale buildup or malfunctions occur. The red flashing light on Rheem tankless water heaters means that the heater has reached a lockout status and requires immediate repair. You can also check that the ohms are correct though your sensor may need to be replaced. Check the water flow servo and the cold water bypass system. If the remote works, the problem is with the cable, and if it doesnt, with the remote control itself. Info about all performed services, including dates. Before you touch or open any electrical components, make sure the power is off. Clogged condensate neutralizer. Rheem error code 90 indicates a blocked flue. Before you do ask for extra help, find out what the error code means and you may be able to solve it without making a service call. Rheem water heater error codes are short and simple. We don't tend to provide any plumbing advice or any advice that should come from a certified professional. In the troubleshooting manual, Rheem says that error code 29 stands for too low heat exchanger outlet temperature. Replace the PCB or fan if necessary. Here are some general steps: When there is a problem with your Rheem tankless water heater, it will display an error code, either on the digital display or on a smartphone app. If your Rheem tankless water heater has been running continuously for over an hour you should look to reset the system. window.mc4wp.listeners.push( A temperature of 32F indicates a thermistor that does not make a good connection, and 199F indicates a direct short. It can also mean a bad combustion alarm, a high water flow rate, a motor problem in the water heater or the voltage of the power supply is very low, and a pilot or main burner valve problem. Rheem error code 34 indicates a problem with the ambient combustion air thermistor. Rheem error code 71 means a problem with the gas inlet solenoid valve. If the readings are not right, replace the thermistor; if they are within specs, you may have to replace the PCB. Of course, the internet is likely your go-to resource for any current information relating to your Rheem tankless water heater. Rheem error code 82 means there is a problem with the PCB programming. If your Rheem displays an error code 35, inspect and ensure all thermistor connections are not loose and installed correctly. When you shop through links on our site, we may earn an affiliate commission. From cleaning the aerators as well as checking the pressure and flow of the water from your hot water faucet to checking then cleaning the water inlet filter on your tankless unit. If you dont get the appropriate voltage reading (8 to 16 VDC), you should replace the water control assembly. Error E5 codes may be the result of a malfunctioning combustion alarm. . Lastly, ensure the igniter wire harness is intact. Replace it if necessary. If the water pressure is low, the water heater is making strange noises, and keeps on coming up with a variety of error codes then it may be time to replace it. Even the largest tankless unit could struggle in a high-demand household (1). If your Rheem displays an error code 29, ensure the heat exchanger is clean of any buildups. Solution: If you cannot find the problem in the venting system, and cannot remove what is blocking the regular operation, call the service. Again, there should be no obstructions to the airflow and the vent terminal should be clear. 90% of the time, this troubleshooting step will help to eliminate the warning message from the control panel. It will be better if you install the heat tape close to the exit to the main drain to get the best output. We hope this list helps you troubleshoot your Rheem tankless water heater and obtain a steady flow of hot water again. Rheem error code 29 indicates that the outlet temperature is too low. On some Rheem units, error code 29 can indicate a clogged neutralizer. Rheem error code 03 is found on units with MIC-180 or EZLink. Have a different tankless water heater brand that needs troubleshooting? How do you clear the error code on a Rheem tankless water heater? The connection to the thermistor is incorrect. Try connecting the remote control to the remote connection directly which is at the bottom of the water heater, though the cable may be the problem and could be replaced. Make sure to check all four sensors. The specific codes might also differ slightly depending on your specific model of Rheem. Replace the PCB or the communications cable if necessary. How to install water heater heat traps quickly and easily? Increase the flow. Rheem error code 31 indicates a malfunction with the water inlet thermistor. Check the air inlet filter, clean it, and ensure the vent pipes are connected correctly. Restart the unit and adjust the high-altitude fuel type chip and DIP switch. Tilt down the computer board, which will reveal the blower motor. One for the hot side and another for the cold side. To restart the heater, turn off the power by switching the switch that controls the power and the switch that controls the heater at the circuit breaker. However, if it doesnt, you should measure the thermistors resistance, and the thermistor or the PCB may need to be replaced. These issues can include water leaks, that it runs out of hot water quickly, and suffers from an inconsistent water temperature. See an examplehow to descale a Bosch tankless heater. So, if you dont think you are up to the task, consult a professional. Rheem error code 13 indicates a problem with the flame rod, typically accompanied by poor or improper combustion and found on indoor units. There is an issue with the outlet thermistor. Company's make changes through the years, and Rheem has been in business a long time with a wide range of tankless water heaters . No spam, we promise. I'm a licensed Home Inspector, Certified Professional Inspector (CPI), Certified Master Inspector (CMI), and FHA 203k Consultant. If you observe no remaining flame, dont hesitate to check the relay connection of flame rod connector. There could be another issue with the heating elements. If none of these measures works then call in a professional to replace the control board (also known as a PCB). The reset button is there for safety reasons. The neutralizer drainage ports should be clear and the neutralizer drainage line (see also 7 Awesome Tips For Sewer And Drainage Line Cleaning) outside the unit must be clear too. Next, access maintenance information to determine the flow rate. You can find a full list of error codes here. 14. Here faulty means either the blower motor itself gets defective or its housing gets clogged with dirt or debris. This may also be the ideal time to perform a bleed-over which requires the cold water supply valve to the water heater to be turned off. Rheem Electric Tankless Water Heater Error Code E5, 05. Finally, unplug the water heater, disconnect the remote control then plug the heater back in and test it without the remote control. Tankless water heaters generally last considerably longer than tank-type heaters, as they dont hold corrosive water for prolonged periods. You can use 100-grit sandpaper to remove the carbon buildup from the flame rods. The heater might also make a noise to alert you to any issues. Then, reset the Rheem tankless water heater again. If everything looks in good condition, you may replace the PCB. Rheem error code 52 indicates an issue with the proportional gas flow regulator valve (PGFR). Rheem error code 03 means there is a problem with the manifold control. Tankless Electric Water Heaters. Replace the water control assembly or the PCB if necessary. Replace the water control assembly or the PCB if necessary. When the problem occurs, the error code is displayed on the LCD screen of the remote or user interface, so by understanding the meaning of the code, the troubleshooting gets easier. Features and error codes may have changed over the years so finding an updated resource is vital to ensure that you know what to do when a fault looks to have occurred. { Am I right? Reset the unit using the Min/Max switches on the PCB. Inspect the condition of the flame rod and blower motor, the air intake, and exhaust vents. There are over 30 codes possible on Rheem devices. Remove the access panel from the front of the unit. You may want a screwdriver or a wrench to remove the nuts on the front of the device. Ensure the unit is installed correctly, the hot and cold water lines are not mixed up, and there is enough water flow. Once you repair the damaged wiring, run the hot water tap to see whether the unit works or not. Check if the maintenance information displays the heat exchangers temperature. We recommend you read our in-depth guide on Rheem Tankless Water Heater Code 12. If there are none, check the exhaust and inlet flue for any blockages. The fan motor should also have the right voltage and may be water damaged due to condensation. Take the time to remove any obstructions from the venting as well as where the vent terminates outside. The heat exchanger may also be suffering from separations or cracks. However, before you do that, confirm that the blower motor is turning freely as it may still operate with a small restriction. Join our exclusive 2,500+ email list to get tailored advice, product roundups, and be the first to see our new content. Besides, your water heater will throw the error code P1 if the water flow sensor goes bad. This is a complete guide on Rheem Tankless Water Heater Error Codes. If the waters temperature is too high, this should be indicated in the maintenance information. Rheem error code 72 means the flame probes are detecting flames. Required fields are marked *. A temperature of 32F means the thermistor is not connected correctly, and 199F indicates a direct short. Rheem tankless water heaters are among the most reliable you can buy, but like any technology, they will eventually encounter issues. To troubleshoot this error code, confirm that the water bypass solenoid has the right voltage going through it. The valves, the main burner, the flame rod electrodes, or the PCB may need to be replaced. Save my name, email, and website in this browser for the next time I comment. Its about a year old and - Answered by a verified HVAC Technician We use cookies to give you the best possible experience on our website. That being said, customers have reported a much higher frequency of certain codes, which well cover here. A Rheem tankless water heater should last 15 to 20 years, and potentially longer with proper maintenance and a water supply that doesnt contain too many minerals. As always, your best resource is your owners manual since it'll have the specific information you need for your model. Error codes are never a pleasant site, but theyre designed to make your life easier. Otherwise, you need to change the PCB. E4 on your Rheem tankless water heater indicates an issue with the flow meter sensor. This means that the flow meter is not sending a signal to the computer which starts the machine. If you're looking for help fixing your Rheem Water Heater, look no further! The minimum flow rate should also be met to make sure that the tankless water heater fires. Rheem error codes 80 and 81 indicate a gas cut-off or extinction failure. Compare HSI to other ignition systems. Before finding out the source of the problem, we recommend you pull out the remote control wiring from the wiring terminal on the PCB. Rheem error code 05 means there is a problem with the combustion. Then, locate the two terminals connected with the remote control. Sometimes this issue can be fixed by simply restarting the unit. If you do think that there are obstructions and foreign objects then they may be in the combustion chamber, the exhaust piping, the vent terminal, or preventing sufficient airflow from coming into the unit itself. While you could continue to reset it every time, the best solution is to either replace it with a larger water heater or install a second one. Ensure the unit is properly grounded and its wiring is in good condition. If the unit does not work after resetting it using the Min and Max buttons, you may be dealing with a faulty PCB. This is a complete guide on Rheem Water Heater Blinking Light Codes. In this case, there are a few things that you need to check. Measure its resistance and voltage and replace it if necessary. Check the flame rods condition, wiring, and voltage. Rheem error code is found on indoor units only and can be caused by a dirty air filter door or improperly installed and seated air filter door or front panel. If your Rheem displays error code 38, light the burner for a few minutes and measure the sensors current readings. You may have to replace the PCB if the readings are within specs. Remove and clean any buildups and blockage in the condensate drain system. Reason: Poor/Improper Combustion due to the flame rod. Reason: Continuous combustion lasting an entire hour. Check the heat exchanger for scale buildup. Also, this warning message indicates that the unit has detected a false flame. Yes, your water heater will occasionally produce cold water in addition to the hot water it normally produces. Touching any wires while the power is on can cause an electric shock. Ensure all parts are in good working condition, clean, and not blocked by a foreign object. Rheem error code 99 can mean abnormal combustion caused by a blocked or obstructed fan, heat exchanger, air intake, faulty combustion air sensor, or exhaust venting. First, check the exhaust and venting flue for any blockages. The blower motor and flame rod FL-25 should also be checked. We broke down everything that will help eliminate the error message from the control panel. You might be able to fix the issue by pressing a single button, or you might need to call for professional help. Your Rheem Tankless Water Heater will beep and show an error code if there is a problem with the unit. Error code 93 should show when the unit has shown down and is a further warning to replace the neutralizer. To fix this issue, you need to slow down the flow rate. Also, make sure the gas flow valves are open and they dont get clogged with dirt or residue buildups. Rheem error code 79 can be caused by condensation or moisture accumulation over the fan motor or damaged or loose wiring. If the fan doesnt move, then ensure it receives enough voltage. If they are then you may want to contact a specialist to take a look. Replace the PCB or the gas inlet solenoid valve if needed. Ensure the condensate line is installed correctly and is within specifications. At 210F, it will automatically shut down and switch on automatically when the temperature goes down to 194F. On demand, tankless units dont have a constant pilot light. Ensure you eliminate every obstruction from the vent termination of the building and the flapper valve. Rheem Tankless Water Heater Code 11: The Reasons & Solutions 01. The water heater will trigger the error code E5 if there is too much water flow. Heres what you can do: Code 12 signifies that the water heater does not detect a flame. Water flow is too low, or the shutoff valve is not fully open. This code indicates that the unit is in standby mode and is not providing hot water. The venting should also be adequately sealed and you may want it inspected by an expert. A Rheem tankless water heater should last 15 to 20 years, and potentially longer with proper maintenance and a water supply that doesn't contain too many minerals. Rheem error code 11 can be caused by low gas pressure, faulty or improperly wired gas solenoid valve, and igniter. Finally, the heat exchanger should be checked to make sure that the fins, fan, and air intake all appear to be clean. Checking the main burner and cleaning it will also worth it. If your Rheem displays error code 99, ensure nothing blocks or obstructs the heat exchanger fins, exchanger flapper valves, vent termination, and clean air intake filter. If you can solve a problem or a fault without having to make a service call then, not only will you learn more about how the water heater works, but you will likely save yourself some money. We recommend you check for a broken wire or poor electrical connection. If your Rheem tankless water heater shows an error code 00, try restarting it. How to troubleshoot Rheem tankless water heaters by using the service error codes chart. Whichever issue it is, your unit will likely still be operating and you can solve the error yourself. Start with inspecting the remote control. [Fixed], Honeywell Water Heater Gas Valve Reset (How-To Guide), 15 Common Rheem Error Codes [Ultimate Guide], Rheem Tankless Water Heater Code 11 (Fixed), Top 5 Navien Tankless Water Heater Problems [Fixed], Whirlpool Duet Dryer No Power To Control Panel (Causes + Solutions). Use your Rheem heater manual as a reference when performing any repairs, and make sure to use the technical support number (1-866-720-2076) whenever you're unsure what to do. Receiving error code 61 -Faulty Blower Motor. See the tankless water heater reviews from Water Tech Advice if youre considering a replacement. In my experience, in most cases, it is a false flame code because when I look through the site glass, the flame is still visible. If needed, replace it with a new one. To fix the Rheem error code IL, drain and flush the heat exchanger as recommended in your owners manual, which Rheem has provided. The neutralizer may need to be replaced and if it does then error codes 92 and 93 may be set off. In some cases, the error comes up when the water heater has a water flow rate that's too high. If it doesnt erase the error message, fix the issues that cause the heater to pop up the error code. If the resistance is not according to specifications, it should be replaced. Begin with slowing down the flow rate of your water heater. Check that the program chip is properly installed and that the control board recognizes the right type of gas, which could be propane or natural gas. Otherwise, you should replace the water flow sensor. You may need to replace the heat exchanger thermistor or PCB. See if there is anything blocking the air vent on the device. It will trip as soon as the water is heated to an extreme temperature. If it does, the unit should be working properly and restarting. If there are air flow restrictions surrounding the unit or obstructions at the vent terminal then this could also result in an error code 34. Here is a list of common error codes for Rheem tankless residential water heaters. Though we share resources, information, and educational guide on plumbing & DIY projects, the content here is not a substitute for professional guidance. A clogged air inlet filter, dirty heat exchanger fins, and bad heat exchanger thermistor are some culprits behind this issue. Is your tankless unit beeping? If you do not feel comfortable performing this yourself then you can contact a professional to do it for you. If the readings are not within specifications, you may be dealing with a faulty thermistor, which you should replace. On top of this, you must ensure the drain will not allow backflow. Ensure the connections to the circuit board are secure. Check the heat exchangers resistance reading as part of the troubleshooting process. Troubleshooting error code 51 involves turning the unit off and on two times at 10-second intervals and inspecting the view window for any signs of a remaining flame. See if the air inlet screen is dirty and clean as necessary. As a second-generation plumber, it was easy for Anthony to get used to the technicalities of all from a tender age, Liner for Pools: Essential Guide and Tips, Above Ground Pool Steps: A Comprehensive Guide, 3 Chlorine Tablets: Essential Guide for Pool Maintenance, AO Smith Tankless Error Codes: Problems And Troubleshooting, Where You Can Find Current Information For Your Rheem Tankless Water Heater, The Error Codes On A Rheem Tankless Water Heater. There are further elements that you can check including that the inlet water supply filter is clean. Ensure that the altitude is set correctly for your particular needs and the vents meet the necessary size requirements for safe operation and use.
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