Oct 16, I called the manufacturer and they had me do a reset and shut off/on the unit and the unit started working again but I had kept the heat on the 2nd fl. Navien error code E001 is caused by an overheating heat exchanger. Change the thermistor if needed. , boiler lost pressure (down to about 4psi) and temperature and code E351 showed up again. Legal Disclosure:Lildutchuncle.com provides and shares information on plumbing, heating & air quality, home improvement, and other DIY projects. Navien Technical Supportoffersreal time remote video support assistance throughVisual Support - RemoteCallon your Apple or Android smartphone. In about an other couple minutes, the heaters started warming up. This never happens when the unit is heating the house. Nowadays, they utilize stainless steel that resists rust. Bad wiring to the water adjustment valve or the valve itself is defective is the reason behind this water heater issue. Error 351 usually has to due with your water pressure in the system. Although not a pleasant experience, this error code, on the other hand, can help you determine what is wrong with your tankless water heater so that you can take appropriate action. Yes, E351 is low water pressure. . Coast-to-Coast Coverage 7 days/week, 363 days per year. Virtually all systems, if they are tied into city water to auto-feed the heater side, must run through a pressure reducing valve to bring the pressure down. If you live in an area that experiences routine blackouts or power failures, you may need to look into a battery backup power supply for your tankless water heater. 2.) It's a pretty normal rise if it's cast iron radiators. When the heat exchanger starts to crack, it means there is a gap, and destructive exhaust gasses could enter your residence. Abnormal Auto feeder valve (make-up water) Call or Text Blue Conservations trained Navien specialists at 484-469-0718. Navien is renowned for producing high-quality water heaters worldwide. The Navien Tankless Water Heater requires a sufficient amount of air pressure for proper ignition. The heating system side doesn't usually have to be more than half that. How To Reset Navien Tankless Water Heater? Thirdly, ensure you open the DHW cold water valve. Thirdly, you must replace the fan motor if you dont get sufficient voltage at the fan motor. Navien error code E438 means there is a problem with the circulation pump. Over the past few years, tankless water heaters have garnered a lot of hype, all because of their knack to deliver you a limitless amount of seamlessly warm water. Filling the pressure too high can cause bursting of pipes. It means there is some issue with a water pressure sensor. 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. You may also need to check and adjust the anti-short cycle timing as it can also cause an error code E012 in some instances. Our technicians will provide you with a unique code to establish a connection between your smartphone and the Navien technician's desktop. Navien error code E434 means there is a problem with the water adjustment valve. Water overflows through condensed water hose. Navien error code E109 indicates an error with the fan motor. Troubleshooting Tankless Water Heater Error Codes: Navien Tankless machines integrate complex technology, so errors and problems can occur at any moment. If water is supplied by auto feeder valve open over 5 minutes, the error(E351) is detected and displayed on the front panel. Keeps shutting down displaying these codes E351 E352 E353. On your Navien Tankless Water Heater, the fault code e438 indicates the recirculation pump is operating abnormally. When the exhaust gets excessively hot (flue temperature exceeds 149 F), your water heater will shut down automatically to avoid further damage. Make sure there are no loose connections. Navien error code E736 indicates a problem with the cascade communication. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. Scan this QR code to download the app now. Auto feeder valve on your Navien Water Heater generally functions abnormally due to the following reasons: Begin with inspecting your entire tankless unit for a possible leak. All Navien Products. The exhaust will get overheated because of a filthy cold water inlet or a dirty heat exchanger. I've been told the heat and domestic water are separate. You might have a pressure reducing valve if your city water pressure is really high. If water is supplied by auto feeder valve open over 5 minutes, the error (E351) is detected and displayed on the front panel. You must log in or register to reply here. Also, check the feeder valve and pressure relief valves activity. E047. Make sure the electrical cord is grounded. All of our technicians are licensed and insured. This is the point when you need to work out whats gone wrong with your heating system. Learn more about our products for home owners. When the air pressure is too high, then the system shuts down to prevent any further damage being done to your boiler. To inspect the flame rod, you should remove the front cover panel. CODE:E736PROBLEM:Abnormality in cascade communication. Navien heater. I have a e351 code, gas, well we accidentally So, call a certified plumber to replace the recirculation pump professionally. Error Code E441 And E445 The error number E441 indicates that there is an open thermistor or a short circuit in the system. You also have to flush the heat exchanger. It drops overnight. 2021 Complete Guide, How To Clean Thermocouple On Water Heater Complete Guide, How To Test The Water Heater Element Complete Step By Step Guide 2021, Best Tankless Water Heater For Radiant Heat, How To Determine The Age Of A Water Heater? Secondly, make sure the fan receives electric power for powering on. Fortunately, its simple to clean the air intake filter. Should be up around 12 psi (depending on your house--how many stories, etc.). Add make-up water to the system if necessary. An example of data being processed may be a unique identifier stored in a cookie. | Home Improvement 2022, How To Turn On Water Heater? In just today. So my Navien had a code E351 along with the ranch sign on. First, turn the unit off for at least 30 minutes. Luckily your boiler will indicate what the problem is by displaying an error code on the control panel. Dont worry next time if you see any of the error codes I mentioned on the front panel display. Your tankless unit will throw this error message due to the following reasons: If you want to reset the diagnostic code E003 and ignite the unit correctly, ensure: To learn more about this, you can check this article: Navien Tankless Water Heater Code E003. In addition to that, check whether the igniter is producing a spark. If it's much higher than that, it's murder on plumbing and fixture. Then, locate the flame rod next to the blower. That's why Navien has staffed two world-class support centers with live technicians to make sure you get the help you need, when you need it. This error informs you there is something wrong while you reset the unit. Unluckily, it occurs always at an unpropitious time. Solution: CODE: E003PROBLEM: Ignition failure in your tankless water heater. So I am consistently getting an E351 error code (abnormal auto feeder) on my brand new Navien NCB-240E Combie. Thats where our fixed price quotation service comes in as an excellent way for your needs to be assessed and recommendations to be made. All Plumbers are screened, licensed, and insured. CODE:E517PROBLEM:Abnormality in DIP switch setting. CODE:E110PROBLEM:Abnormality in air pressure. Many contractors make the mistake of putting a boiler feed pressure reducing valve factory set at 12lbs. The original one was replaced about two years ago. Navien e351 error code E351 - Abnormal Auto feeder valve If the water pressure sensor senses low water level as the heating pipe pressure is low, the system stops operation of the boiler, and refills water automatically. He has a good standing reputation for superior skills in heating, air conditioning, hot water tanks, and indoor air quality systems. If your Navien is displaying an error code E003, ensure the gas supply is on and working, that the unit is powered, the ground wire is connected, and that the igniter is producing a spark. It can occur due to an open or short sensor. Normally, household water pressure should be somewhere in the 40-60 psi range. An open or shorted sensor causes the Navien error code E432. I just turned on the heating on the second floor again and 15 minutes into it, couldn't feel the heat. Abnormal operation: main panel communication Call or Text Blue Conservations trained Navien specialists at 484-469-0718. This is what the error code E046 stands for. NPNU Series If you'd like to support the site, please allow ads. Also, check the intake air filter, the ground wire, power supply, and the wiring at the heat exchanger. To fix this error code, inspect the heating supply thermistors condition and the pump wiring connectors. The unit turned on and I heard a noise indicating the unit is turning itself own but then nothing happened and the psi remained around 5/6 psi. The Navien error code E434 can be caused by an open or shorter water adjustment valve. To fix this error code, check if there is water flow while the cascade system is switched off. It serves a big house. If the PCB is at fault, replace it. If they do restart the unit and if they dont replace the front panel. Does it tell something? You will have to replace the heat exchanger because it cannot be fixed. CODE:E434PROBLEM:Abnormality in water adjustment valve. You will be able to take action to resolve it at the right time. Get FREE quotes from licensed Plumbers in your area today. We feature Rinnai Navien, and Rheem water heaters. The display will change between S value (supply temp) to P value (pressure) in normal water heater operation. From this article, what you will learn: This chapter will reveal both the meaning and how you reset a specific error code. FIX:Inspect and clean the intake air filter. Complete Guide 2022Continue, Do you want to know how much propane does a tankless water heater use? Condensing combi-boilers deliver high-efficiency endless hot water and space heating in one compact unit. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. When the water adjustment valve will perform abnormally, the unit will let you know about it by throwing the diagnostic code e434. Next, remove the air filter and clean it by running clean water. To fix Navien error code E046, check the condition of the wiring at the heat exchanger thermistor. In most cases, the unit will flash this error message because of an electrically shorted thermistor. Examine and wash the intake air filter underneath running water using a toothbrush. When an error code occurs, youll likely hear an audible beeping alarm. However, if the air pressure goes out of range, you cant ignite the unit and the code E110 will appear on the front panel display. Most commonly they get clogged or stop operating causing the boiler to get low on pressure. However, I don't want to keep the filter in bypass while we're home as the water is unsafe to drink. The number tells about the unusual operation of the Dual venturi. Street pressure must be connected to the 1/2" thread connection on the bottom and left turned on. Error code E439 can be caused by a faulty flow sensor, PCB, or no cold water supply. I know that indicates low pressure - However, here is when things get tricky. Call 800-519-8794 to get in contact with Navien technical assistance. Fault codes e421 and e432 will flash on the front panel display when-. If there is water flow, clean and inspect the condition of the flow sensor connector. Navien Tankless water heater Error Code 352 - YouTube If you have no hot water, you may have overwhelmed your tankless water heaters capacity or have at least one error code. An open or shorted thermistor can cause the Navien error code E205. Switch the tankless water heater off and inspect the condition and wiring of the valve. To fix it, check the thermistors condition and wiring. All tankless water heaters will surprise you with an unexpected error code eventually. Most of those PRVs are factory set at 12 psi (although you can adjust them.) When they both stop working, it indicates that there is some major issue with the device itself. I have three radiators on the second floor so I bled their air thinking that may be the cause of the issue, turned on the heat on 2nd fl. Regarding this, get a multimeter and measure the resistance. Whether you have installed a new heater or moved into an apartment that has been empty for a long time, you need to know how to turn on water heater. Navien Boiler Error Codes, Faults & Problems | Boiler Central Save my name, email, and website in this browser for the next time I comment. About 2 years old. This can be a nice and easy one to sort out! CODE:E438PROBLEM:Abnormality in circulation pump. Check if water leaks due to a defective heat exchanger. If you have cover for your boiler, then youll be able to call out for help knowing that theres no need to worry about unexpected bills! NPES2 Series > NPE-150S2 > NPE-180S2 > NPE-210S2 > NPE-240S2. Pressure problems can often be quickly sorted out without needing to call in an engineer. NFC-250/200H ultra-high efficiency combi-boiler | Navien Navien error code E439 is indicative of a problem with the flow sensor. I highly suggest you check the thermistor wiring on both cold water inlet1 and 2. If necessary, replace the thermistor. Once you record the pressure in the system with no call for heat, run hot water and notice what happens to the pressure after turning the internal pump on. The Navien error code E445 is typically caused by a faulty feedback sensor, damaged, opened, shorted, or blocked mixing valve, or a defective PCB. Navien error code E047 can be caused by an open or shorted exhaust thermistor, in which case to fix this error code, you need to check the connection and wiring at the exhaust thermistor. It is the most infuriating problem with the brands older models. To resolve this issue, you should check the wiring. Just today. I've been conducting professional home inspections since 2002. If necessary, replace the sensor. If not, it will not deliver enough water to the recirculation pump it requires. So the code appears and boiler turns off itself when I turn the heat on second floor on. If the error code E109 pops up on the front panel display, understand the fan motor is operating abnormally. Have a check of your manual to determine what pressure your boiler should be to see if this might be causing the issue. The brand has fixed this problem by changing the flow sensor materials. 1. Heats both domestic hot water and provides hydronic heating for the house? You can find it in the lowest corner opposite the on and off button. Navien NCB-240E Pressure Dropped - Terry Love Plumbing Advice & Remodel Whether you need a new water heater, a sink repair, or a toilet fixed We Can Help! Navien error code E012 means there is a flame loss. Resetting is very easy and does not require any special tools or plumbing skills. Credit is subject to age and status and is available to UK residents with a bank account in the UK aged 18 and over who have not been declared bankrupt of had CCJ or an IVA within the last 6 years. It provides information about the problem with the fan motor. You can change the cold water inlet thermistor if necessary. Press the reset button to reset your device. In Easy Maintenance Tips for Tankless Water Heaters w/Photos will outline how to perform tankless water heater flushing and other maintenance. CODE:E445PROBLEM:Abnormality in bypass mixing valve. Even with the best equipment, sometimes things may not go as planned. Check if the flow switch is in the off or on position and the thermal blocks resistance. How To Reset Navien Tankless Water Heater? Admirable Complete Guide It tells you about the abnormality of the external tank thermistor. When a problem arises, your device will exhibit an error code on its LCD on the front. Inspect and clean intake air filter. Navien error code E218 means there is a problem with the operation of the heating return thermistor. Protect the water supply and water heating equipment with eco-friendly water treatment solutions. from the Austin, TX Better Business Bureau. NAVIEN E110 E351 error codes and tips and tricks on navien ncb-240e combi boiler. Make sure there are no loose connections. Navien error code E353 indicates a problem with the water pressure sensor. Examine the controllers condition and replace it if required. Keeps shutting down displaying these codes E351 E352 E353. Locate the reset button on the heaters front control panel. Navien heater. Our Navien ncb-240e has an error code e.351. Just do what the corrective action you need to take to erase the code. FIX:Confirm there are no obstructions in the exhaust pipe. Abnormal operation: EEPROM Call or Text Blue Conservations trained Navien specialists at 484-469-0718. CODE:E740PROBLEM:Abnormality in outdoor temperature sensor. This is where its at right now. It's 12 degrees and I think the utility company is regulating the flow of gas. Inspect and clean the filter in cold water inlet. Regarding this, use a multimeter and ensure it will give a voltage reading between AC 102-132V at the electric outlet. I have four zone heating. When buying a tankless water heater, we hope you find this guide helpful and will bookmark it for further reference. The Navien boiler error code e302 also relates to low pressure in your system. Now, pull the flame rod wire and remove the flame rod. The motherboard or control board failure is widespread. Hot water outlet thermistor open or short circuit Call or Text Blue Conservations trained Navien specialists at 484-469-0718. This can happen because of dirty air intake filters. It specializes in the production of gas, diesel boilers. They told me to call a contractor and have him/her take a look at it and go from there. Fortunately, I already covered a guide on Navien Tankless Water Heater Maintenance. Well, it is a logical query if your unit is powered by propane fuel. This guide will discuss and go over the Navien tankless water heater error codes, their meaning, troubleshooting, and more. If the error persists, check the condition of the sensor. Heating supply thermistor open or short circuit Call or Text Blue Conservations trained Navien specialists at 484-469-0718. To troubleshoot and fix Navien error code E012, confirm that the main gas valve is open and the gas pressure is within spec. Abnormal exhaust temperature. JavaScript is disabled. Navien error code E004 is an indication that the unit is detecting a false flame. Whether you need a new water heater, a sink repair, or a toilet fixed We Can Help! CODE:E016PROBLEM:Overheated heat exchanger. To troubleshoot and fix Navien error code E030, switch the unit off for 30 seconds and then power it back on. An open or shorted sensor causes the Navien error code E441. Consequently, it causes your water heater to flash the code e004. Inspect the condition of the controller and, if necessary, replace it. I'm still confused why your plumber would say that the heating side should somehow match city water pressure. It is not a common issue, but you should be aware of it. Any help would be super appreciated as the plumber seems unwilling to discuss the issue of a faulty unit. To fix Navien error code E001, you may need to clean the strainer and flush the heat exchanger. I'm just not sure if anything can be done about this. Error Code E353 It means there is some issue with a water pressure sensor. Modern tankless units are capable of creating limitless hot water to cater to whole-house needs. Unfortunately, its always at an inopportune time. It will shut off the unit automatically when water temperature exceeds 197.6 F in the heat exchanger. Regarding this, reset the unit by pressing the Back button and ensure there is no call for heat. If by the end you think you need a brand new boiler then we can help with that too. I found the pressure drops 1psi everyday, but not in daytime. CODE:E593PROBLEM:Abnormality in front panel key. Alternatively, you can contact the technical support team at 1-800-519-8794 for help. Ignition Failure- Ensure that the main gas supply valve is open, False Flame Detection Ensure that the electrical cord is properly grounded. You can mostly troubleshoot an issue on your own by using some tools, but you will have to hire professional services to fix complex issues. Yes its a combi boiler and I get my hot water + heat from it. Navien error code E047 is an indication of a problem in the operation of the exhaust thermistor. The limit control is a safety feature, which is also known as a high limit control switch. Navien error code E445 indicates an abnormality in the mixing valve. Our finance provider will do a credit assessment of your circumstances when you apply. The same holds true for Navien tankless water heaters. How to clear the error message from the display? I have a e351 code, gas, well we accidentally turned the valves outside to the left then had the issue - Answered by a verified HVAC Technician We use cookies to give you the best possible experience on our website. I highly recommend you contact the Navient Technical Support Team at 1-800-519-8794. Even with the best equipment, sometimes things may not go as planned. Troubleshooting tips in RED should be done by your local professionals at Texas Water Heaters. So, it will be worth reading the article. The ideal way to resolve this problem is to turn off the heater for some time and restart it. Nonetheless, simultaneously, you must know the requisites, including how many amps does a tankless water heater use to ensure you dont overload your residences existing electrical, Read More How Many Amps Does A Tankless Water Heater Use? Take the note of the standing system pressure displayed on the front panel. Then I plugged out and in the unit to see if that works like it did in the morning but nothing happened. Examine and clean the filter in a cold water inlet. The domestic hot water (DHW) does run at street pressure. You have to inspect the sensors connectors to confirm they are not wet and fixed correctly. This code indicates the unusual operation of the PCB. This error code tells about the unusual operation of the heating supply thermistor. I bled the system and now its at 10.2 PSI cold/inactive and 17.2 PSI when running. CODE:E615PROBLEM:Abnormality in input and memory. It is caused by an open or shorted air pressure sensor. An open or shorted sensor causes the Navien error code E421. Navien error code E441 is a sign of a problem with the hot water outlet 2 thermistor. Complete Guide 2022, How To Fix Your Water Heater Leaking From The Top 2022, Water Heater Leaking From The Bottom? Navien CH-240 is this normal? - Terry Love Plumbing Advice & Remodel However, the low pressure causing the error is on the domestic side. You can replace the sensor if needed. If the error does not go away after resetting the unit, contact a licensed technician. It detects the incoming water flow and then turns on the heater. Though we share resources, information, and educational guide on plumbing & DIY projects, the content here is not a substitute for professional guidance. You have heard the rants and raves of tankless water heaters being so much more efficient, cost effective, and easier to maintain. To learn how to perform that test, check out this guide. Navien error code E060 means a problem with the dual venturi limit switch. My [Navien NCB-240E] [LP] keeps losing pressure and throwing an error code. It may not display this or other websites correctly. Error code e.003. We all have heard that tankless devices are packed with energy-efficiency capabilities. Thats why Navien has staffed two world-class support centers with live technicians to make sure you get the help you need,when you need it. When the flow sensor is rusted, the unit shuts down. It is a temporary problem that can be fixed instantly. Also, check if the electrical cord is grounded properly or not. Probably not. This error code may be fixed by switching off the unit, draining the water to release the pressure, and switching it back on. Then, the unit will pop up that code on the front panel display. Check and remove the intake filter from the heater. But, that pressure has nothing to do with your heating. You can easily detect this problem. However, it will be best if you call a certified technician. PROBLEM: Abnormality in water adjustment valve. Yes, these claims are valid. A place for homeowners, renters, tenants, business owners or anyone with a general question about their HVAC system. Efficient and earth-friendly products designed for any size home. CODE: E438. So, replace the controller to erase the code e060. I have the same unit. It means the false flame is detected in your device. Navien tankless water heater E351 error code FIX TheMillennialHomeowner 347 subscribers Subscribe 33K views 4 years ago Link to water pressure sensor: https://amzn.to/3m5Ozuj Navien. Navien Boiler Error Codes, Causes & How To Fix, 12-year warranty on Worcester Bosch & Viessmann, Common Navien Boiler Error Codes & Faults, Affiliate Area Join our affiliate programme now, The heating supply thermistor has short-circuited, The heating return thermistor has short-circuited, Problem with the dual in-line package switch setting, An Issue with the outdoor temperature sensor, An issue with the main panel communication. Power supply grounding noise can cause malfunction. Its because I broke down the meaning and the reason behind a specific error message. I am sure some of you have expeirenced this. Navien NCB-240E water pressure keep dropping What Is A Thermocouple? No gas in the unit, gas meter, and gas tank, Make sure you open the gas control valve fully, Inspect the flame rod wiring and repair it if needed, Clean the flame rod or replace it if required, Cold water inlet filter gets restricted by dirt, debris, and lint, The wires attached to high limit control switch gets detached or broken, The resistance of the high limit switch goes out of range, The dual venturi wiring gets damaged or disconnected, The wire connection between the fan motor and the PCB gets damaged, Bad or shorted thermistor either at the cold water inlet1 and the cold water inlet2. Learn more about our products for home owners. Get in touch with Navien technical support at 800-519-8794. As An Amazon Affiliate We Earn From Qualifying Purchases But This Does Not Affect Price Of Product. Navien E351 Error code fix explained - YouTube 0:00 / 3:21 Navien E351 Error code fix explained TheMillennialHomeowner 326 subscribers Subscribe 13K views 2 years ago Explanation for my.