You have to inspect the sensors connectors to confirm they are not wet and fixed correctly. Was it enjoyable? Navien Examine and wash the intake air filter underneath running water using a toothbrush. Inspect and clean the filter in cold water inlet. Given the circumstances could the filter actually be the culprit? Navien E351 Error code fix explained - YouTube Hi, I keep getting an error message on my Navien machine : E351 Contractor's Assistant: How old is your Navien appliance or part? PROBLEM: Abnormality in water adjustment valve. It gives information about the low water pressure. djdavenport has it right- the heating system for most 1-2 story buildings with a boiler in the basement should be set to 12-15psi when at idle. I went to look at the unit and the same code E351 was there. Navien tankless water heater E351 error code FIX - YouTube NAVIEN MODEL NCB-210E (NG) 2 weeks took cover off no leaks Ask an Expert Home Improvement Questions HVAC Questions Keeps shutting down displaying these codes E351 E352 E353. Why Is My Liberty Pump Pro 380 Not Working? The Navien error code E434 can be caused by an open or shorter water adjustment valve. The Navien Tankless Water Heater requires a sufficient amount of air pressure for proper ignition. So I am consistently getting an E351 error code (abnormal auto feeder) on my brand new Navien NCB-240E Combie. Next, ensure the dual venturi is working properly. If the problem persists, call a technician to fix the unit. Check if the cold water valve is closed or frozen. Save my name, email, and website in this browser for the next time I comment. But, Read More How Much Propane Does A Tankless Water Heater Use? Resources | Partners Login | Become an NSS |Certifications |Parts List | Technical Support | Careers |Global Network |Warranty, All contents copyright Navien Inc. | About Navien |Contact Us | Terms of Use |Privacy Policy |CCPA |Notices, You accept the use of cookies as described in our, Ultra-high efficiency condensing tankless water heaters, High efficiency non-condensing tankless water heaters, Benefits of Tankless Water Heaters | Navien, Problem Solved: Gandy Installations Saves Customer Enough Space for a Refrigerator. Diagnostic code e016 displayed on your Navien Tankless Water Heater means the heat exchanger is getting overheated. So, it will be worth reading the article. 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. The original one was replaced about two years ago. About 2 years old. Now, the question is- what does actually affect the air pressure of your Navien Tankless Water Heater? There are a plethora of different Navien error codes e351 that may be used to assist in the resolution of the issue. If necessary, replace the sensor. I was getting heat on the rest of the three zones without any issue. Contractor's Assistant: How long has this been going on with your Navien? Thanks for taking the time to reply. High-efficiency condensing and non-condensing tankless water heaters offer endless hot water and reduce gas usage. Check and remove the intake filter from the heater. It tells you about the improper operation of the flow sensor. Keep in mind, there are two systems at work. Thats where our fixed price quotation service comes in as an excellent way for your needs to be assessed and recommendations to be made. Apparently the pressure is low and need to fill up. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. Though we share resources, information, and educational guide on plumbing & DIY projects, the content here is not a substitute for professional guidance. Navien error code E787 indicates that there has been a problem while the unit has been reset. Make sure the major electrical cord is grounded correctly. An interesting observation is this all happened today early morning when I turned the heat on the second floor. Learn more about our products for home owners. Secondly, ensure you bleed the recirculation pump before operating it. Dont worry next time if you see any of the error codes I mentioned on the front panel display. Non-condensing. It can occur due to an open or short sensor. Have a check of your manual to determine what pressure your boiler should be to see if this might be causing the issue. PROBLEM: Thermistor open or short circuited (cold water inlet 2). Navien error code E407 is a sign of a problem with the hot water outlet thermistor. When the exhaust gets excessively hot (flue temperature exceeds 149 F), your water heater will shut down automatically to avoid further damage. It is caused by an open or shorted air pressure sensor. CODE:E515PROBLEM:Abnormality in PCB. Just turn the unit off and remove the front panel. Protect the water supply and water heating equipment with eco-friendly water treatment solutions. Regarding this, get a multimeter and measure the resistance. What you see me do is done at my own risk and if you perform what you see in the video on your own unit you may cause damage at your own risk. Your machine will switch off and on repeatedly. FIX: Confirm all water supply and return lines are open. 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. The Navien error code E445 is typically caused by a faulty feedback sensor, damaged, opened, shorted, or blocked mixing valve, or a defective PCB. It's a pretty normal rise if it's cast iron radiators. While we love, Read More 3 Cons Of A Tankless Water Heater? If required, replace the tank thermistor. Confirm the thermistor and wiring is in good condition. To learn how to clean the air intake filter, you can read this guide: Navien Tankless Water Heater Maintenance. See our article Can Water Heaters Be Installed Outside: What You Should Know for more information on outdoor tankless water heater models. Its a small device adjoining, Read More How To Clean Thermocouple On Water Heater Complete GuideContinue, Tankless water heaters are a vital home appliance that produces warm water for our bathrooms, sinks, washing machines, and dishwashers. It's usually during the day when it's warmer and we're also not home to use hot water. Broken boiler? To fix this error code, inspect the heating return thermistors condition and the pump wiring connectors. Ensure that the PCB version is compatible and check the ready-link cascade cable is installed correctly and the cascade settings. Both are the units brains responsible for receiving and transmitting information in the heater. Navien error code E593 is caused by a problem with the operation of the front panel keys. What have you tried so far? CODE: E434. Replace any parts if needed. Initially, their products were not good enough and suffered numerous unexpected problems, but now they have stepped up, and glitches have become less frequent. To fix it, check the thermistors condition and wiring. Some problems can be resolved by simply resetting the machine, while others will need further effort. It ONLY happens when the boiler is not calling for heat. So the code appears and boiler turns off itself when I turn the heat on second floor on. E047. Also, check the feeder valve and pressure relief valve's activity. Abnormality in limit control! CODE:E760PROBLEM:Flushing/service alarm. Yes, these claims are valid. Theres nothing worse than turning on the tap and getting cold water when you were expecting hot. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. Lastly, adjust the water pressure or fix the issue responsible for low water pressure. NAVIEN E110 E351 error codes and tips and tricks on navien ncb-240e combi boiler. Navien error code E445 indicates an abnormality in the mixing valve. Waterheateradvisors.Com Is A Participant In The Amazon Services LLC Associates Program, An Affiliate Advertising Program Designed To Provide A Means For Sites To Earn Advertising Fees By Advertising And Linking To Amazon.Com. Regarding this, reset the unit by pressing the Back button and ensure there is no call for heat. It happened suddenly so I don't think it scale buildup, I already cleaned the water filter for the unit. Then, reinstall the filter and secure it with the screw. All Plumbers are screened, licensed, and insured. Troubleshooting tips in RED should be done by your local professionals at Texas Water Heaters. To fix the Navien error code, E110 ensures nothing obstructs or blocks the exhaust pipe and that the exhaust pipe is clear. Auto RESET. To fix and troubleshoot Navien error code E016, switch the unit off for 30 seconds and then back on. Many contractors make the mistake of putting a boiler feed pressure reducing valve factory set at 12lbs. Heres How To Troubleshoot It 2022, Tankless Water Heater Frozen Do These Things To Fix It. Just remove the front panel of the unit and get the recirculation pump. I've been told the heat and domestic water are separate. I know that indicates low pressure - However, here is when things get tricky. If not, it will not deliver enough water to the recirculation pump it requires. Navien error code E515 indicates an issue with the PCB. Navien NCB-240E Pressure Dropped - Terry Love Plumbing Advice & Remodel If they get damaged, repair the wires. Schedule Service Now Get Your Estimate. Change the thermistor if needed. The Navien boiler error code e302 also relates to low pressure in your system. It will be better if you call a certified electrician to inspect the outlet electrically. FIX:Confirm properly grounded electrical cord. The E593 code means there is some issue with the front panel key. Navien Error Codes E351 (Abnormal Auto Feeder Valve) Error Code E407 (Hot Water Outlet Thermistor Issue) Error Codes E421, E432 (Thermistor Issue) Error Code E434 (Abnormal Water Adjustment Valve Operation) Navien Tankless Water Heater Error Code 438 Navien Error Code 515 (Abnormal PCB) End-Note If so, this guide is for you. 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. Navien NCB-240 Combi Boiler - DHW is fine, NO HEAT, "WWSD On Diff" - How it Works - Navien NCB 240-110H. There is a Navien NCB-240E installed in my house one year ago. As An Amazon Affiliate We Earn From Qualifying Purchases But This Does Not Affect Price Of Product. [Gas, Electric, Tankless Water Heaters Complete Guide 2021]Continue, What are the cons of a tankless water heater? Navien Appliance Error Codes | Appliance Helpers E351: "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. The unit will cease working if the exhaust temperature exceeds 230F (110 C) for more than 10 seconds. Press the reset button to reset your device. Remove the intake filter and properly wash it using a brush beneath running water. To fix this error code, inspect the heating supply thermistors condition and the pump wiring connectors. Admirable Complete Guide, How Many Amps Does A Tankless Water Heater Use? Coast-to-Coast Coverage 7 days/week, 363 days per year. If you get a reading below 1.0 Ohm, understand the limit control itself is at fault. In the case of an error code E438, you may need to replace the pump, flow sensor, or PCB. It detects the incoming water flow and then turns on the heater. Check and clean the cold water filter and strainer, and flush the heat exchanger. Add make-up water to the system if necessary. When the heat exchanger starts to crack, it means there is a gap, and destructive exhaust gasses could enter your residence. Eric Alvarez is an HVAC guy based in El Paso, Texas, United States. Find the perfect Navien tankless water heater for your residential or commercial application using NaviSizer Use NaviSizer WATER HEATERS NPE-A2 ADVANCED WATER HEATERS NPE-S2 STANDARD WATER HEATERS NPN-U UNIVERSAL WATER HEATERS NPN-E EXTERIOR COMBI- BOILERS NCB-H HEATING AND DHW COMBI- BOILERS NFC-H HEATING AND DHW HEATING BOILERS NHB WATER TUBE In that article, I broke down every step to troubleshoot the unit for the error code e438. It tells you that there was a flame loss. If there is any issue in the internal circuit of the PCB, your Navien unit will display E515 on the front panel display. The following culprits are responsible for this water heater problem: First off, make sure you attach the electric cord to the properly grounded outlet. Yes, this is the meaning of error code E004 on Navien Tankless Water Heater. NPNE Series > NPN-160E > NPN-180E > NPN-199E. Boiler was still not on but I could tell it was trying to start working just by the sound of it. If not, repair the electric outlet. Check the wiring and cold water inlet 2 thermistor and make sure both are in good condition. Navien Error Codes - Blue Conservation If any particular ad is your REASON for blocking ads, please let us know. To fix it, ensure that the sensors wiring is in good condition and working correctly and that the outdoor reset curve is dialed in properly. FIX:Inspect and clean the intake air filter. So, a couple of thoughts. You are using an out of date browser. Just today. Scan this QR code to download the app now. We're on a water well and have a fairly robust water filtration system that I believe IS causing low pressure is the house. 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? CODE:E407PROBLEM:Thermistor open or short circuited (hot water outlet). An open or shorted thermistor can cause the Navien error code E205. Does it tell something? And the boiler started losing pressure down to 5.8psi and displayed E351 code again. Error Code E353 It means there is some issue with a water pressure sensor. If you have an older heater, replace the flow sensor with the newest one; otherwise, install a 5-micron filter in the unit. Error 351 usually has to due with your water pressure in the system. CODE:E782PROBLEM:Abnormality in main panel communication. Examine and clean the filter in a cold water inlet. So lets take a look. I'm just not sure if anything can be done about this. Theyll be able to work out precisely what might be causing the problem and suggest ways of getting it fixed. From this article, what you will learn: This chapter will reveal both the meaning and how you reset a specific error code. Ensure that the electrical cord is properly grounded, Turn off the system for at least 30 minutes, then restart it, Ensure that the exhaust pipe is free of obstructions. You also have to flush the heat exchanger. To fix it, check the thermistors condition and wiring. So my Navien had a code E351 along with the ranch sign on. Space-saving high-efficiency condensing boilers provide the ultimate heating and comfort experience. It means there is some issue with the flow sensor or switch. If yes, turn off the unit and dry the fan connector. Fault codes e421 and e432 will flash on the front panel display when-. Thanks. Modern tankless units are capable of creating limitless hot water to cater to whole-house needs. FIX:Confirm there are no obstructions in the exhaust pipe. A+ rating! If needed, replace the thermistor with new ones. We don't tend to provide any plumbing advice or any advice that should come from a certified professional. Call or Text Blue Conservations trained Navien specialists at 484-469-0718. I called Navien support and was told to read the PSI after I plug out and in the system. Check if the flow switch is in the off or on position and the thermal blocks resistance. Navien error code E480 means there is a problem with the external tank thermistor, typically caused by an open (at temperatures below 14F) or shorted sensor. Examine the thermistors condition and pump wiring connectors. Navien error code E760 is a flushing service alarm. Manage Settings Or, you can call a certified plumber to deal with this issue. If the dual venturi wiring connection is not correct, check the wiring and fix it. Check the thermistors condition along with pump wiring connectors. FIX:Confirm all water supply and return lines are open. Ensure all return and supply lines are open and check the 2-way valves direction. I just turned on the heating on the second floor again and 15 minutes into it, couldn't feel the heat. This is where its at right now. Cons Of a Tankless Water Heater? Our Texas master plumbing license number is M11171. This error code is not an error code per se but rather a reminder. It shows that the DIP switch setting has some problems. CODE:E439PROBLEM:Abnormality in flow sensor. If you find any leak, fix the leaking issue. If it's much higher than that, it's murder on plumbing and fixture. False flame detection! It shows that the water adjustment valve is not operating properly. Navien heater. I have a e351 code, gas, well we accidentally This never happens when the unit is heating the house. This error informs you there is something wrong while you reset the unit. To learn how to perform that test, check out this guide. There are several reasons why this might happen, including: So, this is one of those issues that does need an engineer to come out. In Easy Maintenance Tips for Tankless Water Heaters w/Photos will outline how to perform tankless water heater flushing and other maintenance. Check inlet pressure and all filters. Switch it off the unit and inspect the condition of the APS. Ensure the flow rate and the PCB voltage at the pump are within spec and that the water circulates properly. Turns out, plugging the unit into a poorly grounded outlet can also cause this issue. A rise of 7 psi is a bit high for a low volume system, which could indicate an improper charge on the expansion tank if it's all fin-tube baseboard.