The only thing left would be the unit is not getting enough water, or the pump is not pushing the water through fast enough for the demand. Then remove the front cover of your heater to inspect the internal parts. Complete Guide 2022, How To Determine The Age Of A Water Heater? Most of the time, when troubleshooting a Rheem tankless water heater, you will have to reset it. Well! Instead we have luke-warm water if more than one fixture is turned on. 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]. E3 error code - an error on both thermistors. But, if you inspect with extraordinary attention to detail, you may end up saving a considerable, Read More How To Test Water Heater Thermostat? 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? Replace the rod, making sure it touches the flame when firing and there are no foreign materials getting in the way. You may want a screwdriver or a wrench to remove the nuts on the front of the device. We have covered you. Turn off the double 240V circuit in the electrical panel for the water heater. Corrosion or scale buildup in the heat exchanger is the leading reason in case of error code E5 in the Rheem tankless water heater. So, there will be no chance of pitting the stainless steel. Close hot tap, cycle power on and off at GPO and open hot tap again. You may also reduce water flow by turning the water supply valve to an almost-closed position. The process is quite simple, and you just need a water pressure gauge. Contact a professional to clean or replace the heat exchanger effectively. > Clean or replace the corroded heat exchanger. This educational content is not intended to be a substitute for professional advice. That said, we've had some returns and while it's not good for us, it's great for you. 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. This code means that the unit cannot maintain a flame. Rheem water heaters may function if the E5 error code is not severe. How to Fix: Check the combustion chamber, exhaust pipes, heat exchanger, and vent terminal for scale or blockages. Then, we adjust the pressure regulator. Still, if you are facing any trouble, then let us know in the comment box. Why is Your Water Heater Leaking From Overflow Pipe? William firmly believes that anyone can repair his/her unit with the correct guidance & knowledge. Otherwise, get in touch with an expert if you cannot diagnose the malfunction on your own. } It is an error on the High Temperature. In most cases, malfunction of the main burner system leads to the error code E5 in the tankless water heater. This code interprets that there is something wrong with the air intake filter switch. However, it would be best if you got the right tools for a perfect DIY job. 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. To clean your heat exchanger, we recommend a hydrochloric acid-based solvent, like Scalzo. Basically, if you have a power vent tankless water, it uses a blower or fan to continue the combustion operation. Continue reading our following comprehensive guide to getting rid of the error code ASAP. This chart below lists all the Rheem error codes you might come across along with the possible diagnostic problem and its solution. There is an issue with the inlet thermistor. Now, deploy it back by following the installation instructions. Primarily, check the water pressure from the hot water fixture. Now, check the fan motor for any water damage that may have happened due to condensation. The Rheem tankless water heater error code 13 indicates the poor or improper combustion. Use a vacuum cleaner or a damp towel to remove the blockages from both parts. Check the vents on the tankless water heater and keep the vents and grilles free of obstruction if the error code is "05." Wipe the vents and grilles with a damp cloth to remove dirt or debris. Now have a fan running in there to help dry out. Rheem Tankless Water Heater Code E5 [7 Easy Fixes], 7. It interprets that the heat exchanger has exceeded a temperature of 207 for more than 15 seconds. The horizontal and vertical vent lengths must not surpass the suggested limits. This will reboot your water heater and clear the error from the control panel display. The water flow rate in tankless water heaters must not exceed 12.3 liters, or 3.25 gallons, per minute. Tankless water heaters generally last considerably longer than tank-type heaters, as they dont hold corrosive water for prolonged periods. S103 error code - an error on low voltage. How to Fix: Check the sensor wiring for any damage and clean off any scale. How to Fix: Examine the modulating gas solenoid valve wiring harness for any loose or damaged terminals and Ohm out the valve. When the unit was installed the water was luke warm at best. William is the founder of Fireplacehubs.com. In comparison, electric heaters can heat up to 2 gallons per minute flow rate. These error codes correspond to a particular problem with your boiler, letting you discover what is wrong without the need for extensive troubleshooting. Relocate any hard objects that could be impeding the pipe and causing debris to build up inside. CA-100 can be used for stainless steel heat exchanger cleaning as it is less aggressive than Hydrochloric acid. Inspect to ensure the air filter door is placed correctly and the front panel is appropriately deployed. Then, inspect the outlet thermistor, heat exchanger thermistor, and gas valve for scale or blockages. Try to increase or decrease it to see if it works. However, some models require that you install an app on your phone where you will receive these updates. Plus, a cracked or corroded heat exchanger is one of the major reasons for system overheating due to poor venting and combustion. Malfunctioning From The Water Flow Sensor 4. This code indicates that its time to clean the device. The air intake tube of your heater can be blocked with debris, spider web, dirt, etc. There is an issue with the outlet thermistor. But if you have a gas water heater, you may be getting the E5 code because of this. It interprets that there is a problem with the flame sensing device. Had a 99 error code. You cant afford to ignore this code, as you run the risk of spending more to get a replacement for damaged parts. Check to see that nothing is blocking the flue inlet exhaust or fan. 3. Press and hold the reset button for 3-5 seconds. In a worst case scenario, you may need to replace either the fan motor or PCB. But with a blocked exhaust, this system is jeopardized. Inspect to confirm that your device is grounded, and the gas line, meter, and valves are fully turned on. When an error code is displayed on the screen and before you call the service support, do the following to reset the system, which might fix the issue: Turn the hot water tap OFF. Due to wear and tear, corrosion build-up, and constant expansion lessen its efficiency and prevent the system from operating at its energy-efficient state. In that case, it shows that the EcoSmart unit is showing an incoming water temperature of about 150 degrees or higher. Its pretty simple fixing a majority of these issues behind error E5. You may also wish to Ohm out the motor winding. This should clear the 5 code. I started HomeInspectionInsider.com to help people better understand the home inspection process and answer questions about homeownership and home maintenance. Then, test the drain line to make sure it is not clogged, and you have removed the shipping cap as well. After that, you should replace the front panel and then restart the heater. What does it even mean! Tankless Gas Water Heaters Second Generation Indoor, Outdoor and Direct Vent Up to 199,000 BTU Includes RTG2-42, RTG53, RTG66 and RTG74 models Table of Contents Previous Page Next Page 1 2 3 4 5 Advertisement Related Manuals for Rheem RTG2-42 Water Heater Rheem RTG2-42PVN Specifications However, do not be worried if you can not afford the cash to buy a new inlet thermistor to replace the faulty one. If the LED control board of your EcoSmart tankless water heater is displaying an E5 error code, it means that the desired water volume is too high. 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. Locate the air filter from the top right side of the heater. 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. There are greater odds that you may find several problems with it, or it may be congested. An E4 error code in the Rheem tankless water heater signifies a problem with the water temperature sensor. Contact Rheem for additional service if the error code is "13," "1L" or the previous error code does not clear even after corrective actions. Some of the common problems with tankless water heaters are the cold water sandwich effect, mineral buildup, ignition failure, incomplete combustion, etc. To do this, I recommend that you install a flow restrictor. Also, check to ensure theres no scale blocking the heat exchanger. 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. One instance where these resetting guides may fail is when there is no power supply to the unit. 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. Therefore, to temporarily troubleshoot or reset the EcoSmart tankless water heater or to bypass the E3 error code, follow these steps; You should note that while your EcoSmart tankless water heater is running or working in the CE3 Mode, the heating temperature will default or factory reset to 125 degrees, just as the case with a normal or perfectly working EcoSmart tankless water heater. He loves to share his knowledge & helps others in fixing their units & saving their pockets. Examine the heat exchanger for cracks or other openings, as well as air flow restrictions around the vent terminal and unit. Water heaters display specific codes to represent an underlying issue. Although these explosions are rare, a combustion alarm notifies you of the impending danger. Therefore, you must flush your tankless machine at, Read More How To Flush Rinnai Tankless Water Heater? Wait for approximately 5 minutes. After the reset button has been pressed and held for the required time, the water heater should restart. It is just a short fix for this error code. COPYRIGHT 2023. Once you have an error code, take a look at our list to find out what the problem is. How To Reset Rheem Tankless Water Heater? Locate the reset button on your Rheem tankless water heater. Rheem Fault Code E5 You need to clean the combustion parts and make sure that the igniter is functional. Note: You can also read how to fix Rheem water heater 6 3 flashes. The Drip Cap Checked the exhaust. Code E5 is still showing. I have not tried the "reset" mentioned in the article because I'm not sure where the air would come from to drain it if it's completely connected to the rest of the house's water supply. If it doesn't, you may need to press the button . Never assume that contractors know all water heater location codes for your locality. 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. { Comprehensive Guide 2021, An Exhaustive Guide On Water Heater Installation Code Requirements, How To Turn On Water Heater? When you have a problem in your. 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 dave iwerks, does malathion kill spiders, Aggressive than hydrochloric acid need for extensive troubleshooting that could be impeding the Pipe and causing debris to up... 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