Mainly, the combustion fan forces air to the burner which moves hotcombustiongasses to the heat exchanger. Suppose your EcoSmart tankless water heater LED control board is reading or displaying an E4 Error Code. Water flow ratesthe volume of water that gets heated within a minuteare an essential metric when selecting tankless units. Close hot tap, cycle power on and off at GPO and open hot tap again. Keep reading to discover more information. How to Fix: Press the max button, then the min button to reset the switch. Keep reading our Rheem tankless water heater troubleshooting manual to get rid of the error code ASAP. The connection to the thermistor is incorrect. Ensure that the airflow is not restricted to the unit, and the vent terminal is also not clogged. How often should a tankless water heater be flushed? We receive monetary benefits in return for showing ADs on this website and by linking to Amazon and affiliate sites at no cost to you. High Water Flow Rate Is the heater not heating water? RTEX-36. Thus, you will end up with cold or lukewarm water instead of hot water. 3. From https://www.justanswer.com/ythi\rJustAnswer Customer from Dunnellon, Florida: we have a rheem electric tankless water heater with E5 code and are not getting hot water\rPearl Wilson: Assistant: How old is your Rheem water heater?\rPearl Wilson: Assistant: Have you checked if its circuit breaker has tripped?\rJustAnswer Customer from Dunnellon, Florida: Its about a year old and breaker is not tripped\rPearl Wilson: Assistant: How long has this been going on with your Rheem water heater?\rPearl Wilson: Assistant: What have you tried so far?\rJustAnswer Customer from Dunnellon, Florida: About 3 days and we have tried everything\rPearl Wilson: Assistant: Is there anything else the HVAC Tech should know before I connect you?\rPearl Wilson: Assistant: Rest assured that they'll be able to help you.\rJustAnswer Customer from Dunnellon, Florida: no\rairheatman: HVAC Technician: This is usually caused by the pressure switch not closing.\rairheatman: HVAC Technician: Is the small vent motor running?\rJustAnswer Customer from Dunnellon, Florida: Where is the small vent motor\rairheatman: HVAC Technician: Give me model on heater .\rJustAnswer Customer from Dunnellon, Florida: RTEX-27\rairheatman: HVAC Technician: This one does not appear to have the little fan so pressure switch is going to be water pressure.\rairheatman: HVAC Technician: Issue may be too high or too low.\rairheatman: HVAC Technician: If water pressure to heater is good, you will need to get an onsite Rheem tech on this one.\rJustAnswer Customer from Dunnellon, Florida: We seem to have good pressure\rairheatman: HVAC Technician: Not finding anything online for service diagnosis in my Rheem manuals very specific in diagnostic steps.\rairheatman: HVAC Technician: Just says pressure switch error .\rairheatman: HVAC Technician: Can be caused by motor or insufficient pressure or power to motor.\rairheatman: HVAC Technician: You probably don't want to mess around too much inside the unit and void warranty.\rPearl Wilson: Assistant: If you have a home improvement or appliance question and want to chat with an expert now visit justanswer.com/ythi The Rheem tankless water heater is a piece of excellent equipment to have at home or in the workplace. Then, Ohm it. Rheem Tankless Water Heater Code E5 [7 Easy Fixes] 1. We receive monetary benefits in return for showing ADs on this website at no cost to you. In the end, you have to Ohm out the heaters safety circuit. Examine the flame rod to make sure it is joined and free of carbon collection. The reset button can be found on most Rheem water heaters either immediately on top of the limit switch, which is positioned next to the thermostat, or it can be found nearby. The next step is to take off the heaters front panel so you can get to the limit control switch. Now, deploy it back by following the installation instructions. Now if the burner assembly is blocked by dust and debris, it will fail to continue its operation, leading to interruption in the combustion system. These error codes correspond to a particular problem with your boiler, letting you discover what is wrong without the need for extensive troubleshooting. The E5 error code on a Rheem Tankless Water Heater signifies the excessive water flow rate. Turn OFF the remote control. Reset your Rheem tankless water heater unit will assist you in clearing the error code from the control panel. Then the heat exchanger transfers heat from the burner into the water quickly. We earn a commission if you purchase at no additional cost to you. { Please select accurately so we can provide you with the best service providers in your immediate vicinity. Lack of combustion air is one of the most frequent reasons for throwing the error E5 on the control panel. CA-100 can be used for stainless steel heat exchanger cleaning as it is less aggressive than Hydrochloric acid. S103 is an error on low voltage. However, the water will not reach the desired temperature. Primarily, check the water pressure from the hot water fixture. Finally, check the igniter to ensure its functional. It informs you that theres an accumulation of limescale and scale deposits. A Rheem water heater may keep on working, despite an error E5. Before you touch or open any electrical components, make sure the power is off. Step 1: First off, shut off the electrical power of your heater and close the water shut-off valve as well. Sediment Deposits In The Heating System 5. Well, as your water heater is a new one, it is worth contacting the Rheem customer support center before doing anything by yourself as your heater must cover the warranty period. An E4 error code in the Rheem tankless water heater signifies a problem with the water temperature sensor. Slow it down until the LED display starts to show the selected degrees of temperature. The causes of the E5 code appearing on your heaters display include too much water flow, incorrect gas pressure, blocked air intake, clogged exhaust, dirty air filter, lack of airflow in the room, and corroded heat exchanger. But if you have a gas water heater, you may be getting the E5 code because of this. When you see this error code, it becomes necessary to learn how to reset Rheem tankless water heater. Ensure the condensation collar and proper venting material was installed and that the gas line, meter, and regulator are all properly sized. See if proper venting materials and condensation collar was deployed. It interprets that there is a problem with the flame sensing device. Rheem tankless water heater code 45 Hello! If it shows the recommended pressure, secure the lock nut tightly. Have a different tankless water heater brand that needs troubleshooting? Unthread the cap at the very center of the regulator. However, you will mostly end up frustrated with the units performance. This code means that the unit cannot maintain a flame. Continue with Recommended Cookies. Take off the filter and check the air intake line to see if it is dirty. What causes Rheem tankless electric hot water heater E5 code? Clean the ventilators if already in the room in case they are dirty. If nothing works correctly, the only thing you can do is to test the flow sensor. There is a problem with the gas control valve. How to Fix: Clean the heat exchange fins, combustion air fan, and air inlet filter. If you exceed the limit, the water will no longer be heated. Below, we'll explain how to read codes on your gas heater and what you should do to rectify the situation. We and our partners use cookies to Store and/or access information on a device. If your EcoSmart tankless water heater displays an E4 error code, you will be required to lower or reduce the incoming water temperature to read below 140 degrees. Running every faucet at once may overwhelm your heater and fail to heat. Blockage in the air intake and exhaust vents. So stick your flathead screwdriver in to increase the gas pressure, youre gonna go clockwise. The air intake tube of your heater can be blocked with debris, spider web, dirt, etc. Once you are done, regulate the temperature or flow rate of the machine. WaterHeater HUB 2021 - All Rights Reserved. For instance, if your EcoSmart tankless water heater unit is displaying this E2 error code, it shows that you are being notified of the EcoSmart inlet thermistor that is not reading the proper temperature. In most cases, you need to get a replacement for old faucets. Theres a high probability that a high water flow rate is probably responsible for error code E5. They are usually displayed on the screen of the heater unit itself. Why does my tankless water heater go cold sometimes? })(); Anthony Barnes is the founder of Water Heater Hub and a second-generation plumber by profession. There is a wide variety of potential causes for the problem, including faults with the supply of gas and electricity, or failure to regulate temperature. Yes, your water heater will occasionally produce cold water in addition to the hot water it normally produces. Complete Guide 2022, How To Test Water Heater Thermostat? The fan motor should turn with minimal resistance. In the end, test the igniter to make sure it is fully functional. The tankless water heater will encounter a problem in the combustion system due to a blocked air filter, or from the blockage in the heater venting. Defective ODS thermocouples, dirty or defective flame rods, and incorrect burner manifold pressure are the culprits for popping up this warning message. Well, if cleaning doesnt work, replace the air filter. 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. E5 is an error due to the high flow rate. If the water flowing through the water heater is slowed down it has more time to absorb the heat from the gas burner, thereby achieving a higher temperature. Similarly, bleed over in current installations can create an error. Rheem tankless water heaters are among the most reliable you can buy, but like any technology, they will eventually encounter issues. Manage Settings Each tankless water heater has a unique flow rate that it operates. The heater might also make a noise to alert you to any issues. Hopefully, your water heater issue will be solved. We will try our best to solve the problem ASAP. A small amount of restriction will still allow it to function freely. Then remove the front cover of your heater to inspect the internal parts. Now take an in-depth look at the step-by-step guide to fix the Rheem tankless water heater code E5 in a shorter time. Plus,incomplete combustion isanother reason responsiblefor appearing the code. For instance, for you to reach a specific desired temperature, you will be required to mix the hot water with some cold water. Never assume that contractors know all water heater location codes for your locality. Blocked Water Inlet Filter 3. Again, read the users manual. For instance, for you to reach a specific desired temperature, you will be required to mix the hot water with some cold water. Are you ready to learn? > Clean or replace the corroded heat exchanger. Ran for a couple months. . They are usually displayed on the screen of the heater unit itself. To do this, I recommend that you install a flow restrictor. All Right Reserved by HeaterFixLab. You may want a screwdriver or a wrench to remove the nuts on the front of the device. The gas line, meter, and regulators all should work correctly. 11. Before developing Water Heater Hub, Anthony Barnes was a full-time plumber, and he has undertaken a wide variety of projects over the decades. Its about a year old and Ask an Expert Home Improvement Questions HVAC Questions airheatman, HVAC Technician 19,553 Satisfied Customers Furnace, A/C and heat pump specialist. 2. 4. Clogged Exhaust 6. Now, check the flue inlet and exhaust termination and ensure they are free of blockages and have sufficient clearance space. When the unit was installed the water was luke warm at best. Tankless water heaters generally last considerably longer than tank-type heaters, as they dont hold corrosive water for prolonged periods. Then, as a diagnostic alarm, the control panel displays the error code E5. This is usually located near the control panel. Not yet. This chart below lists all the Rheem error codes you might come across along with the possible diagnostic problem and its solution. Over time, tankless water heaters may collect deposits and minerals build-up, which can erode the walls inside your containers heating chamber. If your EcoSmart tankless water heater LED control board displays an S103 error code, it shows that the EcoSmart tankless unit is not receiving the correct amount of power to run it. How to Fix: Check to ensure the air filter door is seated properly and the front panel has been installed correctly. How To Reset Rheem Tankless Water Heater? If necessary, turn in more. Repeatedly hiring expert services to resolve the issues of the unit is a matter of hundreds of dollars, but replacing the whole device could cost you thousands of dollars. : Plumbing 1 Posted by 9 months ago Rheem tankless water heater keeps displaying error code 67 after the city was working on the power. Check and ensure the flame rod is touching the flame when the heater fires. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. Thats the reason the LED control board will show an E5 error code. Why do you need to know about the water heater code violations and, Read More An Exhaustive Guide On Water Heater Installation Code RequirementsContinue, Have you ever taken a bath when the tankless water heater was off? How to Re-Light Your Rheem Tankless Water Heater. To clean your heat exchanger, we recommend a hydrochloric acid-based solvent, like Scalzo. need to install plumbing. Consult your owner's manual to find out exactly where you need to look. 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. In case you have more queries about your Rheem heater, you can leave us a comment below. Had a 99 error code. Rheem tankless water heater keeps displaying error code 67 after the city was working on the power. But there are a few more factors that need your attention. This is why the E5 code on the electric tankless water heater is seen. How To Reset Rinnai Tankless Water Heater. The motor will still work in case of any restriction. [Gas, Electric, Tankless Water Heaters Complete Guide 2021], How To Reset Rinnai Tankless Water Heater? Tried the reset, even shut down main power for ten minutes. Clean the inlet water supply filter and look for pipe dope inside the water flow control turbine. Corrosion or Scale Deposit On Heat Exchanger FAQs: What are the most common problems with tankless water heaters? Some of our partners may process your data as a part of their legitimate business interest without asking for consent. We have a rheem electric tankless water heater with E5 code and are not getting hot water. If the gas pressure is inadequate, incomplete combustion will take place resulting in incomplete combustion. In some cases, the error comes up when the water heater has a water flow rate thats too high. When your EcoSmart tankless water heater is getting water below 150 degrees, the display LED will illuminate or light with the desired set home temperature. I also have a problem with the hot water going cold after running for about three minutes. It could be that the room your water heater is placed in has no air circulation. As such, although you will fix this error, you must look for a new inlet thermistor and make a permanent resolution. This is because there is a temporary troubleshoot that you can perform. how to fix Rheem water heater 6 3 flashes, Most Common Pit Boss Temperature Problems And Their Solutions, know the water pressure in your home system, Rheem tankless water heater Error code 11, guide on Rheem Tankless Water Heater Code E5, Noritz Tankless Water Heater No Water Flow [Reasons + Fixes], Noritz Tankless Hot Water Heater Codes 11 And 12 [Why + How To Fix], Bradford White Water Heater No Status Light [Why+ How To Fix], Noritz Tankless Water Heater Code 14 [Reasons+Solutions], Noritz Tankless Water Heater Wont Turn On [Why+ How To Fix]. To check the blower motor, first, locate it from behind the printed circuit board (PCB) inside of the heater, indicated in the below picture. Rinnai fault code 11 - No ignition. > Adjust the water pressure regulator of the main water line. New tankless water heater heater. All the thermostats are rated at 140 degrees. How to Fix: Turn off all hot water taps to reset the unit. Its recommended that you refrain from using the water heater until the issue with the blinking lights has been resolved. 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. Now no hot water with a code 45 (water leak detected) I took cover off and cleaned out all visible water. Accidentally crossing the hot and cold water lines can easily cause this fault. How to Fix: There is likely an issue with the flame rod. Besides, it may be due to the fuse in the power board being blown out. Every sink, shower, or bathtub has an aerator. Your best bet is to get in touch with an experienced plumber, but if you want, you can follow these steps: It indicates that the heaters flue is blocked. For instance, if your EcoSmart tankless water heater unit is displaying this E1 error code, it shows that you are being notified of the EcoSmart inlet thermistor that is not reading the proper temperature. Follow the below step-by-step guide to fix the combustion issue from your water heater: Whenever you encounter a combustion problem in your tankless water heater, making the air filter blockage free is a must to fix the issue. Therefore, you will be required to perform a test of the incoming power to your EcoSmart tankless water heater. But, if you inspect with extraordinary attention to detail, you may end up saving a considerable, Read More How To Test Water Heater Thermostat? From https://www.justanswer.com/ythiJustAnswer Customer from Dunnellon, Florida: we have a rheem electric tankless water heater with E5 code and are not gett. All Plumbers are screened, licensed, and insured. I have a new Rheem RTEX-24 on the 2nd floor replacing a typical tank-style heater installed by licenced plumbers I have used before with no issue. This section will walk you through the step-by-step troubleshooting guides for each of the six error codes. Comprehensive Guide 2021Continue, Whether you plan to deploy the tankless water heater yourself or employ a specialist, you need to grab information about the water heater installation code requirements before doing anything. COPYRIGHT 2023. Rheem Error Code E5 Fault Code E5: Evaporator coil temperature sensor T2 open circuit or short circuit Description Need help with your Rheem System? If you want specific instructions, consult the owners manual. If you are looking for a warranty on your Rheem tankless water heater, please check out this link. Ohm out the sensor and replace, if necessary. Conclusion. Well! Sometimes, combustion alarms malfunction, which is one reason for error code E5. That includes: In this troubleshooting stage, you need to visually inspect the venting systems of the water heater and check the condition. Look here. Apart from these, defective combustion systems, problems with the main burner or pilot, and faulty motor are other culprits responsible for throwing this error code.

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