Before finding out the source of the problem, we recommend you pull out the remote control wiring from the wiring terminal on the PCB. The diagnostics become simpler since the Rheem tankless heaters use the electronic control board and advanced technology with an optional remote controller and control panel. Reason: Poor/Improper Combustion due to the flame rod. 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. Also, we broke down the troubleshooting steps to clear the message. You may even want to take out the flame to check it and clean it with some steel wool. It will be best to check the manual and use the fuel type recommended by the manufacturer. This particular error code could also be triggered due to the wrong altitude setting if you reside in a high-altitude environment. forms: { Touching any wires while the power is on can cause an electric shock. On top of this, you must ensure the drain will not allow backflow. We will assume that the licensed plumber/installer professionally installed your Rheem tankless water heater. How do you clear the error code on a Rheem tankless water heater? In a worst case scenario, you may need to replace the control board. However, before you do that, confirm that the blower motor is turning freely as it may still operate with a small restriction. A flame failure is a little different from a failure to ignite and will likely require a specialist to take a look. Do note that solving each code will require a comprehensive understanding of the technical details of a tankless water heater. The heater might also make a noise to alert you to any issues. E5 on a Rheem Tankless Water Heater means there is a high flow rate. You may need to ensure that the inlet valve is completely open and there are no obstructions to the cold water inlet pipe. Try resetting the device, and if that doesnt fix the issue, its best to have a professional address the situation. How to troubleshoot Rinnai water heaters successfully using Rinnai error codes guide. These include: Fortunately, re-lighting your Rheem tankless water heater is easy. 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. Hotwatertalk.com is a participant in the Amazon Services LLC Associates Program and other affiliate advertising programs, designed to provide a means for us to earn fees by linking to the affiliated sites. Also, make sure the gas flow valves are open and they dont get clogged with dirt or residue buildups. Cookie Duration Description; cookielawinfo-checkbox-analytics: 11 months: This cookie is set by GDPR Cookie Consent plugin. If the resistance is not according to specifications, it should be replaced. Has your Rheem tankless water heater suddenly stopped working? Check the gas pressure; it might be too low, or the gas valve is not fully open. Ensure the heat exchanger flapper is not blocked and moves freely and that the whole vent system is clean and not blocked. Simple. You may have to replace the PCB if the readings are within specs. Check if the maintenance information displays the heat exchangers temperature. Rheem error code 82 means there is a problem with the PCB programming. Get FREE quotes from licensed Plumbers in your area today. Rheem error code 13 indicates a problem with the flame rod, typically accompanied by poor or improper combustion and found on indoor units. However, if it isnt, check the resistance readings of the heat exchanger. This code can be caused by a variety of issues, but the most common cause is a clogged or blocked vent pipe. Afterward, measure the voltage of the wiring between the water control and the connector B. If there is enough current running, you may need to replace the burner assembly; otherwise, replace the PCB. Info about all performed services, including dates. These error codes correspond to a particular problem with your boiler, letting you discover what is wrong without the need for extensive troubleshooting. Close the hot water tap and turn OFF the remote. The most typical problem with a water heater tends to be a water leak which can be common due to how many components come in contact with water. Ignition failure at start up. Your Rheem Tankless Water Heater will beep and show an error code if there is a problem with the unit. Check the heat exchanger for scale buildup. Solution: Make sure that the hot water tap is open enough to provide at least the minimum required water flow. Rheem Tankless Water Heater Error Code 10, 06. 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. You may want to do a service call though you can check the wiring on the remote control yourself, specifically for any loose or damaged connections. If its incorrect, you should adjust it. How to install water heater heat traps quickly and easily? If the temperature is insufficiently low on the heat exchanger then you should receive error code 29 on your mid-efficiency or condensing unit. If needed, clean the inside of this motor. So, I highly recommend you to call a professional to handle this. Over heating. Rheem error code 51 indicates a problem with the gas inlet solenoid valve. If none of these measures works then call in a professional to replace the control board (also known as a PCB). Consult the guide and see whether you have a grasp on the problem indicated by the code. If fault re-occurs book service call. You may need to replace the thermistor or the PCB. Your Rheem tankless water heater will trigger the P1 error codes if there is a lack of sufficient water flow to activate the unit. However, even the best tankless water heaters sooner or later may stop working or be affected by other If the water heater has the mixing valve installed and does not operate properly, it must be replaced. For two showers and a load of laundry, you'll need a water heater that's rated to deliver at least 5.5 GPM for your area (2.0+2.0+1.5=5.5)). Rotate the thermostat to achieve your desired water outlet temperature. We hope this list helps you troubleshoot your Rheem tankless water heater and obtain a steady flow of hot water again. Close the hot water taps and remove or turn off the circulation pump, if any installed. Rheem error code 90 indicates a blocked flue. 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. Rheem Tankless Water Heater Error Codes P1, 02. Rheem error code 21 means the air intake filter is not working correctly. { Knowing that the ignition has failed is straightforward enough yet finding out why can prove difficult. E5 on a Rheem Tankless Water Heater means there is a high flow rate. Resetting a Rheem Tankless Water Heater: Ultimate Guide, Candy Tumble Dryer Keeps Stopping: Troubleshooting Tips, Loc Error Code on Hoover Dryer: Troubleshooting Guide, [Fixed] Rheem Tankless Water Heater Code 12, Hot Water Heater Calcium Removal [How to Guide], Samsung Washer SUD Code but no SUDs? Rheem error code 10 means a false flame has been detected. I guess the PA error code is a air conditioner related fault code. If not, continue reading. Secondly, inspect the exhaust vent or air intake pipe for a clog. What does E5 mean on my Rheem tankless water heater? Error code 93 should show when the unit has shown down and is a further warning to replace the neutralizer. What does E5 mean on my Rheem tankless water heater? If you meet the gas supply and installation requirements, check the following: If there are no issues with the wiring and readings are normal: If you find that your tankless heater often requires a reset, it might be that its overloaded. (function() { If the readings are not within specifications, you may be dealing with a faulty thermistor, which you should replace. event : evt, Rheem error code 76 indicates a failure in communication with the remote control. The wiring for the flame rod may also be damaged, and the flame rod needs to have sufficient voltage. If the error code 12 persists, contact a licensed technician. Discover how to replace a faulty hot surface ignitor in your water heater with our comprehensive troubleshooting guide. If you dont get this reading, you should replace the heat exchanger thermistor. This error can be checked via two methods; checking that the front panel is installed properly and that the air filter door looks to be sealed correctly. Unless you have an in-depth knowledge of water heaters, youre best to not risk making the situation worse. 13 Common Rheem Tankless Water Heater Error Codes, 01. There is an issue with the outlet thermistor. Call the technician. 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. Read Details: Rheem Tankless Water Heater Code 29. Ensure the programming chip is suitable for your Rheem model, and the altitude at which the unit is used. During winter & freezing days, we recommend you insulate the drainpipe by using a heat tape. Error code 92 is displayed during operation, and when the unit is switched off, error code 93 is shown. 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. 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. Rheem Electric Tankless Water Heater Error Code E4, 04. Check the heat exchanger air inlet and perform regular maintenance to flush the unit with scale buildup. 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. If this sensor is at fault, it will not send a signal to the computer, which starts the tankless unit. As mentioned above, there are several more error codes you can potentially encounter with a Rheem tankless water heater. Installing the kit on the water heater, will treat the condensate properly for safe disposal into the drain. Once you repair the damaged wiring, run the hot water tap to see whether the unit works or not. This code indicates that the unit is in standby mode and is not providing hot water. When this process is completed, your water will be murky, because of the limescale that has been removed. Whichever issue it is, your unit will likely still be operating and you can solve the error yourself. These steps will get fix the fault and restore your water heater back to working condition. Increase the flow. Error Code 11indicates an ignition failure. Unfortunately, many things can cause an ignition failure. Hi there, i am Eugene - an experienced HVAC / appliance technician. Rheem is a trusted American appliance brand that is close to 100 years old. If you observe no remaining flame, dont hesitate to check the relay connection of flame rod connector. Hi Scott. Rheem error code 11 indicates that the ignition has failed. These are: Check the resistance readings of each sensor wiring and replace the sensors if not working correctly. To troubleshoot Rheem error code 61, check the motors wiring condition and the Molex connections at the PCB. Yes, your water heater will occasionally produce cold water in addition to the hot water it normally produces. Rheem error code 24 indicates a problem with an operational switch. Cycle your water heater two times by turning off- then turn on- at 10 seconds intervals. Rheem Tankless Water Heater displays a lot of error codes due to specific reasons. If they are then you may want to contact a specialist to take a look. Rheem error code can display when the neutralizer or drain pipe gets clogged. The venting should also be adequately sealed and you may want it inspected by an expert. For instance, the exhaust cannot be recirculated back into the units fresh air intake. As soon as you spot an error code on your Rheem tankless water heater you may begin to panic as to what it means. The PCB may need to be replaced if the sensor is working properly. Then, inspect the heat exchanger fins for a clog and release the buildup. callback: cb Inspect the gas valve wiring harnesses for loose or damaged terminals2. Rheem Tankless Water Heater Error Code 29, 11. A tankless water heater is a complicated device. Most of the time, when troubleshooting a Rheem tankless water heater, you will have to reset it. To troubleshoot this error code, confirm that the water bypass solenoid has the right voltage going through it. From the bottom of the unit, take out two screws that hold the computer bracket in place. Ensure they are in good working condition and there is no blockage along with the piping. Then, locate the two terminals connected with the remote control. He has a good standing reputation for superior skills in heating, air conditioning, hot water tanks, and indoor air quality systems. Before you try anything else, reset your Rheem water heater. If necessary, replace the remote control, remote control wiring, or the PCB. Find the most common problems and see how to fix issues. A false flame being detected may also necessitate a service call, yet there are certain steps to take first. Knowing what each error code means can save you from having to make a service call and can give you peace of mind about how serious, or not so serious, the problem is. 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. The inlet fuses to the power supply should also be in working order and ensure that the hot and cold water lines are not crossed following the installation. Afterward, take out these two screws from the top of the computer board. If your Rheem displays an error code 12, ensure all gas valves are open and adequate gas pressure. Leave the unit for 2o minutes. The gas pressure to your water heater should range between 1.2- 3.5Kpa. Thankfully, Rheem has incorporated an in-depth error code system, with each code corresponding to a specific problem with the heater. Insert a flat-head screwdriver through the thermostat dial. Check if the maintenance information displays the ambient air temperature. See if the fins on the heat exchanger are dirty and clean as necessary. Nonetheless, freezing weather can also block up the neutralizer drainage system. It means the desired water volume is too high that exceeds your desired preset temperature. 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. Look here. Rheem error code 66 indicates a problem with the water bypass control. Before doing so, remember to remove the Molex from the CB. Now, you may ask- how can I determine whether the suspect is the remote control or its wiring? You can find more information in the user manual. For every 5 gallons, there should be 2 gallons and 3 gallons of water, Put you pump into the bucket and run it for 30-45 minutes, Make sure that power is turned on to the unit and circuit breaker is powered on, Make sure that the safety device on your unit is not activated resulting in the water heater not operating, Sometimes errors are caused as a result of communication fault instead of any particular issue with a component on the unit. To reset the water heater, turn off the hot tap water and the unit itself. All rights reservedDisclaimer:The content published on hotwatertalk.com is not professional advice. This beeping makes sense, as it is possible that you might not look at your heaters digital display for a while and a major problem could otherwise go unnoticed. If this drainage system gets clogged, your tankless water heater will flash the error code 29 to prevent the burner from being flooded. The causes of the E5 code appearing on your heater's display include too much water flow, incorrect gas pressure, blocked air intake, clogged exhaust, dirty air filter, lack of airflow in the room . When there is any problem with the unit, it will pop up an error code on the display. Rheem error code 34 can be caused by scale buildup on the ambient combustion air sensor, blocked vent terminals, fan blades, airflow, damaged or bad wiring, and short circuits. There are a few reasons why the reset button might trip. Tankless water heaters generally last considerably longer than tank-type heaters, as they don't hold corrosive water for prolonged periods. 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. The unit will throw the error code e51 if the gas inlet solenoid valve is at fault. In some cases, the error comes up when the water heater has a water flow rate that's too high. It indicates a neutralizer drainage failure. Check that the vents are connected properly with no obstructions, the correct materials should have been used for the installation. If there is no remaining flame, you should check the display maintenance for information regarding the flame rod. If not, you should replace the flow meter sensor or the flow control valve of your Rheem Tankless Water Heater. Just release blockage from those components to get the ODS thermocouple back in the working condition.