It is highly recommended to contact a professional rather than fixing it by yourself. One instance where these resetting guides may fail is when there is no power supply to the unit. You can test for bleed by shutting off the cold water supply valve and open a hot water tap. Therefore, to resolve this error code permanently, you may be required to replace the inlet thermistor. You may also wish to Ohm out the motor winding. What Happens If I Ignore the Error Code E5 in a Rheem Tankless Water Heater? How to Fix: Program the PCB for the proper gas type. Unit is about two years old Rheem-36. However, you will mostly end up frustrated with the units performance. 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. Whenever he finds the perfect solutions to any issues of heating appliances after doing in-depth research, he loves to share them with his readers. Undersized Tankless Water Heater 7. An example of data being processed may be a unique identifier stored in a cookie. The bathtub has a water volume of 3.5 gallons per minute to 8 gallons per minute. For optimum performance of the heater, the required water flow rate is close to 0.66 GPM. Thankfully, Rheems water heaters provide an error code when something goes wrong. As an Amazon Associate, I earn from qualifying purchases. There should be at least the minimum required flow rate of gas to the fire unit. As such, although you will fix this error, you must look for a new inlet thermistor and make a permanent resolution. If it is set at a lower altitude, it will allow the easy growth of limescale. Check the vents, exhaust flue, heat exchanger, combustion fan, and inlet filter for blockages. I initially wanted a much larger one but he talked me into the Rheem 13 KW 2.54 GPM. listeners: [], Check and ensure the flame rod is touching the flame when the heater fires. How to Fix: Examine the modulating gas solenoid valve wiring harness for any loose or damaged terminals and Ohm out the valve. Can you run out of hot water with a tankless water heater? For example, this could be due to a power surge or power malfunction. Correct venting of a water heating system can guarantee efficient performance and increase the lifespan of your appliance. LPG users check Propane bottle level. Then connect the gauge to any male thread faucet of your house, and turn on the water. They operate just like computers that are programmed to heat water instantly.Their self-diagnosing system displays the error code on the screen, so you can easily interpret and amend the issues yourself.If you are unacquainted with the error code, you can consult the users manual or read our thorough guide on how to reset Rheem tankless water heater.Following the steps will certainly help you in troubleshooting your Rheem water unit. See the tankless water heater reviews from Water Tech Advice if you're considering a replacement.. See our list of the best electric tankless water heaters. The cookie is used to store the user consent for the cookies in the category "Analytics". Then, we adjust the pressure regulator. How to Fix: Check for proper grounding and that the device is receiving gas of the right type and pressure.Examine the flame rod to ensure its connected and has no carbon buildup. Blocked Air Intake 5. E2 error code - an error on the outlet thermistor. How to Fix: Check the voltage of every flame rod and Ohm out the solenoid valves. First of all, clean the air inlet screen and fins on the heat exchanger. This article will find symptoms, causes, and steps on how to reset Rheem tankless water heater. Here's how to do so: 1. Make sure there are no restrictions to the air flow. How To Fix Error Code P1 On Rheem Tankless Water Heater [7 Easy Solutions] 1. 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. Now, grab a flathead screwdriver and look behind at the gas regulator. It is basically a boiling safety warning. There is an issue with the inlet thermistor. Also, flush the heater to eliminate scale blocking inside the heat exchanger. 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. It tells you that the combustion fan is not spinning correctly. Save my name, email, and website in this browser for the next time I comment. Check the ventilation system and vent openings for blockages or dirt and clean as needed. This code interprets that there is something wrong with the air intake filter switch. Examine the thermistor wiring for any kind of damage and clean and Ohm the thermistor. You will find it at your gas supply line. It would be wise to take help from a professional to do the work. Now, remove all the blockages from the vents and where it ends outside. Some of the common problems with tankless water heaters are the cold water sandwich effect, mineral buildup, ignition failure, incomplete combustion, etc. Please select accurately so we can provide you with the best service providers in your immediate vicinity. You should always fix E5 errors, irrespective of the reasons behind the E5 error. The E5 code appearing on your heaters display due to one or more reasons like 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. First of all, ensure the fan motor is turning freely and getting the proper voltage. Continue reading our following comprehensive guide to getting rid of the error code ASAP. A tankless water heater can acquire mineral buildup over time, which can damage the walls inside the heating chamber of your tank. > Adjust the water pressure regulator of the main water line. Slow it down until the LED display starts to show the selected degrees of temperature. Over heating. An E4 error code in the Rheem tankless water heater signifies a problem with the water temperature sensor. To fix the heater issue, it would be wise to contact the Rheem customer support center before doing anything by yourself as your heater is only 4 months old. Read more about how to clean scales from heat exchangers. This results in a lack of combustible air and results in incomplete combustion. Finally, Ohm out the safety circuit. Corrosion or Scale Deposit On Heat Exchanger FAQs: What are the most common problems with tankless water heaters? Manage Settings This is why the E5 code on the electric tankless water heater is seen. Rheem tankless water heater code 45 Hello! This is an EcoSmart tankless water heater error on the inlet and the outlet thermistor. However, the pressure for every model has to be within 10.5 w.c. or 2.6 KP for natural and 14 w.c./3.5 kPa for LP gas. Excessive water flow doesnt let the water absorb heat as it passes through the heater. Now come to the condensate trap and look for any degradation. ); A small amount of restriction will still allow it to function freely. Continue with Recommended Cookies. Keep reading to discover more information. Learn more, Facebook II Twitter II Pinterest II Linkedin. To do so: Why is an Error E5 Showing on my Rheem Tankless Water Heater? Incorrect Gas Pressure 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 This is not ideal for a flame. You will find a screw or bolt and a locking nut system in the regulator. The exhaust of your heater lets out heat and carbon dioxide from the flame. Therefore, to resolve this error code permanently, you may be required to replace the inlet thermistor. Complete Guide 2022, How To Test Water Heater Thermostat? Now, check the fan motor for any water damage that may have happened due to condensation. Not yet. How to Fix: Clean the heat exchange fins, combustion air fan, and air inlet filter. As such, you will be required to slow down the flow rate. William firmly believes that anyone can repair his/her unit with the correct guidance & knowledge. Rheem Tankless water heater code E5 is a diagnostic alarm from the control panel. After cleaning, ensure a proper installation of the venting system. So now we will start troubleshooting by slowing down the water flow in the system. The air intake tube and exhaust vent might beblocked with debris, spider web, dirt, etc., resulting in a lack of combustible air and incomplete combustion. In this instance, follow the below instructions: Rheem tankless water heater Error code 11 is the error indication of the ignition failure. The red flashing light on Rheem tankless water heaters means that the heater has reached a lockout status and requires immediate repair. Rheem water heaters may function if the E5 error code is not severe. This allows the flame to breathe and the heater to not overheat. There may also be a foreign object in the combustion chamber or exhaust pipework. Standard EcoSmart tankless water heater error codes include: E1 error code - an error on the inlet thermistor. Now no hot water with a code 45 (water leak detected) I took cover off and cleaned out all visible water. Well, if cleaning doesnt work, replace the air filter. Why Do Water Heaters Have a Reset Button? Selecting the tankless route for your familys hot water needs certainly comes with countless benefits like saving utility bills, Read More How To Vent Tankless Water Heater? However, some models require that you install an app on your phone where you will receive these updates. RTEX-36. How to troubleshoot Rheem tankless electric hot water heater E5 code? 5 Best Water Heater Blankets (2023 Reviews), The Best Portable Tankless Water Heaters (On-The-Go Hot Water), The Best Condensing Water Heaters (Go Environment-Friendly), 5 Best Hot Water Recirculation Pumps (2023 Reviews), Best Tankless Water Heater Flush Kits of 2023. This section will walk you through the step-by-step troubleshooting guides for each of the six error codes. Whenever you get any of these errors, you can troubleshoot or reset them by following this step by step guide: This article will help you understand how to troubleshoot each of the EcoSmart tankless water tank error codes. Excess Water Flow 2. This is an EcoSmart tankless water heater error on the outlet thermistor. Instant provision of hot water makes it ideal for many users. At 40 psi water flow will be maximum. How often should a tankless water heater be flushed? Tighten the locknut and move the adjustment screw counterclockwise to reduce pressure and water flow. This is usually located near the control panel. You can order the specific blown-out fuse from amazon. The fan blade should be in good shape and tightly attached to the motor shaft. So, it is time to time to clean the venting following the below ways. However, it would be best if you got the right tools for a perfect DIY job. Since water heaters require air to keep the pilot burning, a closed valve will shut off the air supply. The motor will still work in case of any restriction. It will make your Rheem tankless error code troubleshooting far quicker. For example, you must have the right-sized wrench, screwdrivers, and a user manual for the unit. Never assume that contractors know all water heater location codes for your locality. When you shop through links on our site, we may earn an affiliate commission. Tankless Electric Enjoy the comfort and convenience of continuous hot water on demand with a Rheem tankless water heater. Well! Peter has been a homeowner for 35+ years and has always done his own repair and improvement tasks. First of all, flush the heat exchanger by consulting the users manual provided by the manufacturer. 1 I had a contractor install a Rheem electric tankless water heater in my casita. How to reset Rheem tankless electric hot water heater E5 code? This code indicates that there is some issue with the gas inlet solenoid valve. If you are confused, see the picture below: Take the air filter out from the filter adapter and clean it using a toothbrush. How to Fix: Examine the gas inlet solenoid valve wiring harness to check for any damaged or loose terminals and Ohm out the valve itself. It is also vital to note that in this CE3 Mode, it will not be possible for you to control the outlet temperature. Its pretty simple fixing a majority of these issues behind error E5. Ohm out the sensor and replace if necessary. Turn off the double 240V circuit in the electrical panel for the water heater. Another potential cause happens mostly with freshly installed units. Ran for a couple months. 4. Also, make sure that there are no plumbing or technical problems such as crossovers. 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. 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. In this guide, we have collated the major 5 reasons with solutions to fix Rheem tankless water heater code e5 problem. Finally, test the blower motor to find out any obstructions or damaged parts. Before you touch or open any electrical components, make sure the power is off. Today, we will break down all Rheem tankless units error codes to help you diagnose the exact solution to the issue you are experiencing with the product. But, if you inspect with extraordinary attention to detail, you may end up saving a considerable, Read More How To Test Water Heater Thermostat? To solve the issue, flush your tank and check the dip tube and replace it if needed. Inspect to ensure the air filter door is placed correctly and the front panel is appropriately deployed. 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. The locknut and move the adjustment screw counterclockwise to reduce pressure and water flow in the tankless. 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Simple fixing a majority of these issues behind error E5 Showing on my Rheem tankless water heater crossovers... Flame to breathe and the outlet thermistor or power malfunction your Rheem tankless electric hot water with a Rheem water... The combustion fan, and steps on how to test water heater and for... A foreign object in the electrical panel for the water temperature sensor never assume that contractors all... Or dirt and clean as needed heater can acquire mineral buildup over time, which can damage the walls the.