These include: Fortunately, re-lighting your Rheem tankless water heater is easy. Whichever issue it is, your unit will likely still be operating and you can solve the error yourself. Reason: Poor/Improper Combustion due to the flame rod. Rheem error code 05 means there is a problem with the combustion. Step #1: First off, turn off all hot water faucets that are connected to your Rheem tankless water heater. However, both codes would only be displayed on a condensing tankless water heater. Lastly, ensure the igniter wire harness is intact. Ensure all vents are not blocked and in good working condition. Rheem error code 29 indicates that the outlet temperature is too low. A defective or loose wire connection between the water control and the connector B on the PCB is the main culprit that causes your heater to pop up with this error message. It may be the case that both the fan motor and the control board need to be replaced. Ensure the unit is properly grounded and its wiring is in good condition. Our comprehensive Rheem Water Heater Troubleshooting guide will explain common is. Learn how they work and if they're worth the effort and cost. Check if the water inlet filter or fixture aerator is clogged and unblock it if it is. Before doing so, remember to remove the Molex from the CB. Therefore, our top advice is that you contact a professional plumber when you see an error code. I have noticed that this problem occurs when the flame rods are dirty and needs to be cleaned. 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. Its recommended that you refrain from using the water heater until the issue with the blinking lights has been resolved. Why is Your Water Heater Leaking From Overflow Pipe? Read Details: Rheem Tankless Water Heater Code 29. If the dip 1 switches are switched off, the unit can be prevented from working properly. Error code 35 should require you to inspect each of the thermistor connections to the control board as they should all be securely connected. Double-check that the exhaust venting and air intake are both installed properly and look to be in good working order. Before you make a service call for error code 51, check for any loose/damaged terminals on the wiring harness for the gas control valve. Damaged Igniter Wire Harness 04. He has a good standing reputation for superior skills in heating, air conditioning, hot water tanks, and indoor air quality systems. From the bottom of the unit, take out two screws that hold the computer bracket in place. In this case, check the followings: 1. Consult your owners manual to find out exactly where you need to look. If that does not work then you could confirm that the tankless unit is correctly grounded. Follow the same troubleshooting steps and procedures as in error code 51. Remember, Rheem tankless models need routine maintenance to remain energy efficient. Rheem Tankless Water Heater Error Code 10, 06. If you have this code, it is important to check your vent pipe to make sure it is clear and not blocked. If your Rheem displays an error code 51, ensure the gas valve wiring is in good working condition and installed correctly. By displaying a code on your tankless heater, you, or a professional, can read the code to understand what went wrong and how to fix it. See whether its correctly installed and whether its functioning properly. After cycling the unit if you notice any remaining flame through the view window, I bet the gas control assembly is the culprit. 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. Get DIY installation tips and troubleshoot common problems. In this guide, we will look at where you can find the most current information for your Rheem tankless water heater and look at the error codes (see also AO Smith Tankless Error Codes: Problems And Troubleshooting) in detail. Reason: Air Intake Filter Switch Malfunction. If the water doesnt flow, we recommend you increase the flow rate. It is a significant upgrade to the version that uses tanks and delays water supply till it's hot. Check if the fan motor shaft moves freely and is not blocked or damaged. The connection to the thermistor is incorrect. If there is a lengthy distance between the shower and the heater, then you will experience a minute of cold water followed by one minute of hot water. Defective Gas Solenoid Valves 03. Have a different tankless water heater brand that needs troubleshooting? Replace the water control assembly or the PCB if necessary. The burner assembly fires up only when you open the hot water tap. Rheem error code 51 indicates a problem with the gas inlet solenoid valve. See if the air inlet screen is dirty and clean as necessary. Ensure there are no buildups, foreign objects, or deposits near or around the unit and its venting system and combustion chamber. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); How to Reset Rheem Tankless Water Heaters, How Do You Troubleshoot a Rheem Electric Water Heater Rheem Error Codes, 5 Common Paloma Tankless Water Heater Error Codes, Common Electrolux Dryer Codes (E64, E65, E66, EF1, E91), F5E1 Maytag Washer Error Code? The next step is to take off the heaters front panel so you can get to the limit control switch. While troubleshooting, Rheem error code 65, confirm the unit receives enough water and all wiring connections are in good working condition and tight. First, check the exhaust and venting flue for any blockages. After you see a code on a tankless water heater, a common first step is to reset the device. How to troubleshoot Rheem tankless water heaters by using the service error codes chart. Another problem that might occur when the water flow is reduced is the excessive temperature of the heat exchanger. Save my name, email, and website in this browser for the next time I comment. Solution Initially, fine-tune the water flow or temperature. These error codes correspond to a particular problem with your boiler, letting you discover what is wrong without the need for extensive troubleshooting. They are dirty or defective flame rods, faulty ODS thermocouples, and incorrect burner manifold pressure. E5 on a Rheem Tankless Water Heater means there is a high flow rate. 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. However, these quick fixes will notalways fix your problem. Some simple issues can result in the water flow being low and you should be able to solve them yourself. Rheem error codes 92 and 93 indicate that the neutralizer is due for a replacement. Check if the maintenance information displays the hot water outlet temperatures. If it does, the unit should be good and restarted. That may be the cause but it could also be due to a clogged neutralizer on the condensing unit and you can clean the air inlet screen and the heat exchanger fins. The water heater will trigger the error code E5 if there is too much water flow. To determine the root cause of the issue, use a jumper wire to directly connect the remote control to the PCB. How to use a diagnostic system to repair a faulty heater. This may be that the water control valve has the incorrect voltage or that there are loose/damaged connections on the water control valves wiring harness. Rheem error code 99 indicates that the fan motor is not creating enough ventilation. Also, check that the vent terminal was installed properly on the device. Then, reset the Rheem tankless water heater again. Heres how to do it: This should allow the device to fully reset itself, and you might find the error code has magically disappeared. Solution: If your tankless water heater is using natural gas, make sure that there is no interruption in gas supply from the distributor. If the water heater has the mixing valve installed and does not operate properly, it must be replaced. Error E5 codes may be the result of a malfunctioning combustion alarm. One common problem with Rheem tankless water heaters is not getting any hot water while showering. The repair guide provides info on how to deal with the heating problems. Do note that solving each code will require a comprehensive understanding of the technical details of a tankless water heater. An error code 90 typically indicates that there are blockages in the heat exchanger or blower motor. Open the hot water faucets in your home and if there is a steady flow of water from those faucets then you may have a bleed-over problem which would require a service call. Rheem error code 38 indicates a problem with the oxygen depletion sensor. A faulty water flow sensor or PCB can also be the reason for your unit not working. Want to know what the error code displayed on your Rheem tankless means? Remember that depending on your altitude, or for every 3,280 feet, a different programming chip is used, and indoor and outdoor models use different chips. Troubleshooting John Wood tankless water heaters. Look here. Ensure that the vent pipes are connected to the vent termination and that the venting meets various requirements (such as lengths, diameter, the construction material). Nonetheless, freezing weather can also block up the neutralizer drainage system. Most of the time, when troubleshooting a Rheem tankless water heater, you will have to reset it. Rheem error code 31 indicates a malfunction with the water inlet thermistor. If this sensor is at fault, it will not send a signal to the computer, which starts the tankless unit. This is a complete guide on Rheem Tankless Water Heater Error Codes. Reason: The Control Board is not programmed. 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. Then, inspect the heat exchanger flapper valve and make it move freely at the vent connection of your water heater. If not, the problem could be caused by the blower motor and the PCB. For instance, the exhaust cannot be recirculated back into the units fresh air intake. You could also check the outlet thermistor, heat exchanger thermistor, and the gas valve are all in good working order. There may also be blockages in the heat exchanger which should be removed. What does E5 mean on my Rheem tankless water heater? Replace the PCB or the PGRF valve if necessary. If the error code persists, contact a licensed technician. This means that the flow meter is not sending a signal to the computer which starts the machine. Ensure minimum water flow and clean cold water inlet pipe and aerator screens. Unline electric water heater units, a Rheem tankless unit displays an error code when something out of the ordinary happens. Touching any wires while the power is on can cause an electric shock. However, with so many different error codes, you might have no idea what each code means. Follow the descaling procedure to remove the scale build-up in the heat exchanger (there should be an error code). Replace the PCB or the gas inlet solenoid valve if needed. If the readings are looking good, the PCB may be at fault. We hope this list helps you troubleshoot your Rheem tankless water heater and obtain a steady flow of hot water again. When this error code will pop up, understand there is no ignition on your tankless water heater. A clogged condensate drain line and incorrect condensate line piping are the common causes to block the drainage system. Both error codes 80 and 81 suggest a problem with the gas cut-off valve. The Rheem tankless water heater code means that incomplete combustion is taking place in your heater or it may be that the water flow is too high. Error code 65 may necessitate calling out a specialist yet you can check for a fault yourself. Solution: Make sure that the gas shutoff valve provides enough gas to the main gas burner, and there is no obstacle. Ensure the condensate line is installed correctly and is within specifications. Problems with the combustion can also be caused by the flame rod though this should only display on an indoor Rheem tankless water heater system. 12. If checking that the fan blade is tightly fitted on the motor shaft and spinning freely does not work then you may want to replace the sensor. You could increase the flow rate or simply adjust the temperature though if all of these potential solutions fail then there may be a problem with the water flow sensor itself which needs to be replaced. Years of experience in the HVAC field have taught him many lessons, not the least of which is that the value of quality and knowledge far exceeds any promised initial savings. 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. Learning the error codes of your Rheem tankless water heater may seem exhaustive yet can prove to save you money. Our whole-home gas and electric models are great for homes with busy families, homes with luxury bathrooms and vacation homes, while our point-of-use electric models are ideal for a single faucet or shower. Next, inspect the ODS thermocouple to see whether it functions properly or not. However, some models require that you install an app on your phone where you will receive these updates. Follow An E4 error code on your 45 model tankless water heater, indicates that there is an issue involving the flow meter sensor (also referred to as cold water temperature sensor.) Ensure that the altitude is set correctly for your particular needs and the vents meet the necessary size requirements for safe operation and use. It will usually be red or black, and may be labeled "reset.". Rheem error code 11 can be caused by low gas pressure, faulty or improperly wired gas solenoid valve, and igniter. If there is no remaining flame, you should check the display maintenance for information regarding the flame rod. Check the flame rods condition, wiring, and voltage. To troubleshoot Rheem error code 61, check the motors wiring condition and the Molex connections at the PCB. 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. Reason: Insufficient Heat Exchanger Temperature. It indicates your water heater fails to solve the combustion issue of the unit. Before you touch or open any electrical components, make sure the power is off. If needed, replace it with a new one. No Hot Water: Easy DIY Water Heater Repair Guide, Water Heater Breaker Size: Easy Wire & Breaker Size Guide, Best Laundry & Utility Sink Faucets: Our Top Picks for 2023, How to Unclog a Shower Drain: 7 Ways to Remove a Shower Drain Clog, How Long Plumbing Lasts: When to Replace & Costs. Cycle your water heater two times by turning off- then turn on- at 10 seconds intervals. Of course, dont hesitate to replace the blower motor if it gets broken. Finally, check for blockages in the inlet filter and combustion fan. There could be another issue with the heating elements. We recommend you read our in-depth guide on Rheem Tankless Water Heater Code 12. Call the service if none of the steps taken above works. There are over 30 codes possible on Rheem devices. Rheem Tankless Water Heater Error Codes C7, 03. The most common codes include Codes 5, 11, 13, and 29. However, you can also find a wealth of information from the owners manual which will be specific to your model of a tankless water heater. Before you try anything else, reset your Rheem water heater. Close hot tap, cycle power on and off at GPO and open hot tap again. Pipe dope may also cause a blockage inside the water flow control turbine. Troubleshooting for a switch malfunction could mean turning it off and on again by forcing a reset on the control board, all you need to do for that is press the MIN and MAX button. In this case, you must replace the gas control assembly. These issues can include water leaks, that it runs out of hot water quickly, and suffers from an inconsistent water temperature. Common symptoms, problems, and fixing tips. Stop the water flow, switch the remote control off, and unplug it. If you have a Rheem tankless water heater, you may have noticed a code 11 on the display. Ensure they are in good working condition and there is no blockage along with the piping. As an Amazon Associate, I earn from qualifying purchases. 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. Rheem Tankless Water Heater Code 11: The Reasons & Solutions 01.
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rheem tankless electric water heater error codes