If the error code persists, measure the PCBs voltage and replace the fan if the voltage is within spec. 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. If yes, you must replace the dual venturi. Ensure the flow rate and the PCB voltage at the pump are within spec and that the water circulates properly. Clean the strainer and flush the heat exchanger if needed. Check with the manufacturer for recommendations on water pressure.My specific unit is a Navien tankless water heater/furnace model NCB-240e. This video support assistance allows you to share live job site video with our technicians using your smartphone camera. Complete Guide 2022, How To Fix Your Water Heater Leaking From The Top 2022, Water Heater Leaking From The Bottom? So the code appears and boiler turns off itself when I turn the heat on second floor on. To learn how to clean the air intake filter, you can read this guide: Navien Tankless Water Heater Maintenance. Navien error code E593 is caused by a problem with the operation of the front panel keys. Navien error code E011 means there is high pressure on the heating side. So, replace the controller to erase the code e060. It means there is some issue with the flow sensor or switch. Navien error code E515 indicates an issue with the PCB. CODE:E109PROBLEM:Abnormality in fan motor. Any help would be super appreciated as the plumber seems unwilling to discuss the issue of a faulty unit. This can happen because of dirty air intake filters. | Home Improvement 2022Continue, Have you ever taken a bath when the tankless water heater was off? Check direction of the internal 2-way valve. Basement Watchdog Battery Alarm Add Distilled Water, Every meaning of the common Navien error codes. Check if water leaks from the heating pipe. [Gas, Electric, Tankless Water Heaters Complete Guide 2021]Continue, What are the cons of a tankless water heater? If you find any leak, fix the leaking issue. In that article, I broke down every step to troubleshoot the unit for the error code e438. I just discovered the issue this morning. You can change the cold water inlet thermistor if necessary. If it appears filthy, clean it with an emery cloth. Bad wiring to the water adjustment valve or the valve itself is defective is the reason behind this water heater issue. NPEA2 Series > NPE-180A2 > NPE-210A2 > NPE-240A2. Switch it off the unit and inspect the condition of the APS. Make sure there are no loose connections. When the system is calling for heat I see a consistent 33 PSI. Corrosion accumulation will become a cause of reduced operation. Takagi Water Heater Error Codes [Ultimate Guide], Navien Tankless Water Heater Error Codes [Complete List], Navien E001 Error Code (Overheating Heat Exchanger), Error Code E016 (Overheating of Heat Exchanger), Error Code E046 (Abnormal operation of limit control), Error Code E060 (Malfunctioning Dual Venturi), Error Code E109 (Abnormal fan motor operation), Navien Error Codes E110 (Abnormal Air Pressure), 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 Tankless Water Heater Humming Noise [Fixed]. Whether you need a new water heater, a sink repair, or a toilet fixed We Can Help! Navien error code E002 can be caused by low water pressure, so you have to ensure that the unit receives enough water. CODE:E421PROBLEM:Thermistor open or short circuited (cold water inlet 1). 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. Other Troubleshooting Tankless Water Heater Error Code Guides, Error Code E001: Heat Exchanger Overheating, Error Code E002: Low Pressure on the Heating Side, Error Code E011: High Pressure on Heating Side, Error Code E016: Heat Exchanger Overheating, Error Code E030: Abnormal Exhaust Temperature, Error Code E047: Exhaust Thermistor Error, Error Code E060: Dual Venturi Limit Switch Error, Error Code E109: Fan Motor Activity Error, Error Code E127: APS Error (Open, Short, Initial Value or No Response), Error Code E205: H/E Outlet Error: Thermistor Open or Short, Error Code E218: H/E Inlet Error: Thermistor Open or Short, Error Code E302: Low Water Pressure Error, Error Code E352: High Water Pressure Error, Error Code E353: Water Pressure Sensor Error, Error Code E407: Hot Water Outlet 1: Thermistor Open or Short, Error Code E421: Cold Water Inlet 1: Thermistor Open or Short, Error Code E432: Cold Water Inlet 2: Thermistor Open or Short, Error Code E434: Abnormality in Water Adjustment Valve, Error Code E438: Abnormality in Circulation Pump, Error Code E441: Hot Water Outlet 2: Thermistor Open or Short, Error Code E480: External Tank Thermistor Open or Short (System Boiler Thermistor Setting Only), Error Code E517: DIP Switch Setting Error, Error Code E594: Partial PCB Communication Error, Error Code E736: Abnormal Cascade Communication, Error Code E782: Main Panel Communication Error, Error Code E783: OT-remote Controller Error, Error Code E785: Abnormal Flow Switch Operation, overwhelmed your tankless water heaters capacity, Easy Maintenance Tips for Tankless Water Heaters w/Photos, battery backup power supply for your tankless water heater, heating supply thermistors condition and the pump, Can Water Heaters Be Installed Outside: What You Should Know, Troubleshooting Tankless Water Heater Error Codes: Rinnai, Troubleshooting Tankless Water Heater Error Codes: Rheem, Troubleshooting Tankless Water Heater Error Codes: Navien, Troubleshooting Tankless Water Heater Error Codes: Noritz, Troubleshooting Titan Tankless Water Heater Problems, Troubleshooting EcoSmart Tankless Water Heater Error Codes, Troubleshooting Tankless Water Heater Error Codes: Bosch. According to. Examine and clean the filter in a cold water inlet. What have you tried so far? Hi, I keep getting an error message on my Navien machine : E351 Contractor's Assistant: How old is your Navien appliance or part? Protect your water supply and your water heating equipment with eco-friendly water treatment solutions. Regarding this, use a multimeter and ensure it will give a voltage reading between AC 102-132V at the electric outlet. So a plumber came and fixed the leakcirculator pump was ok but the pipe connected to it was leaking. FIX:Turn off the water heater for 30 minutes and restart. This guide will discuss and go over the Navien tankless water heater error codes, their meaning, troubleshooting, and more. Then, pull out the cold water inlet filter from the unit and clean it. A properly sized and operational expansion tank should keep the pressure fairly constant, regardless of whether the boiler is firing or not. I found the pressure drops 1psi everyday, but not in daytime. In the case of an error code E438, you may need to replace the pump, flow sensor, or PCB. Besides, the flame rod will fail to detect a flame if it gets covered with dirt, mineral deposits, or scale build-ups. If water is supplied by auto feeder valve open over 5 minutes, the error (E351) is detected and displayed on the front panel. Hope New Member Messages 11 Reaction score 0 Points 1 Error code E439 can be caused by a faulty flow sensor, PCB, or no cold water supply. CODE:E439PROBLEM:Abnormality in flow sensor. Or, you can call a certified plumber to deal with this issue. It may not display this or other websites correctly. Navien Tankless water heater Error Code 352 Chuck Barron 32.8K subscribers Subscribe 12K views 3 years ago A Navien tankless shuts down on error code 352. Does your system have a water feeder/ reducing valve? Thats where our fixed price quotation service comes in as an excellent way for your needs to be assessed and recommendations to be made. Schedule Service Now Get Your Estimate. Coast-to-Coast Coverage 7 days/week, 363 days per year(Closed Christmas Day and New Year Day). NPNU Series If the error does not go away after resetting the unit, contact a licensed technician. 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. If the error code persists after resetting the unit, you may need to replace the air pressure sensor. If the problem persists after reset, replace the APS as soon as possible. The number tells about the unusual operation of the Dual venturi. If your Navien display reads out that you're at 31.5 psi, you're a prime candidate for your pressure relief valve to start spitting, and that could get you back to where you started. To fix this error code, inspect the heating supply thermistors condition and the pump wiring connectors. Why is Your Water Heater Leaking From Overflow Pipe? It tells you that there was a flame loss. In Dallas tx. The malfunctioning dual venturi is the culprit that causes your Navien water heater to pop up the error message E060. The error code E441 informs about the open thermistor or short circuit problem. 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. If needed, call a licensed technician. (Closed Christmas Day and New Year Day) If your system displays this code, you need to confirm the water pressure is within good ranges. FIX:Inspect and clean the intake air filter. CODE:E046PROBLEM:Abnormality in limit control. The same holds true for Navien tankless water heaters. Dont worry next time if you see any of the error codes I mentioned on the front panel display. CODE:E441PROBLEM:Thermistor open or short circuited (hot water inlet 2). In this post, well instruct you about how to clean thermocouple on water heater yourself. 1.) It means there is some issue with the OT-remote controllers operation. Save my name, email, and website in this browser for the next time I comment. So I am consistently getting an E351 error code (abnormal auto feeder) on my brand new Navien NCB-240E Combie. You can easily detect this problem. It ONLY happens when the boiler is not calling for heat. It detects the incoming water flow and then turns on the heater. Now I pressed the reset button and the PSI displayed 4.1. While we love, Read More 3 Cons Of A Tankless Water Heater? PSI was 4.1. Navien NCB-240 Combi Boiler - DHW is fine, NO HEAT, "WWSD On Diff" - How it Works - Navien NCB 240-110H. Otherwise, you will not get sufficient power supply to turn the unit on. | Home Improvement 2022, How To Turn On Water Heater? Check and clean the cold water filter and strainer, and flush the heat exchanger. Navien is renowned for producing high-quality water heaters worldwide. Check the left drain valve of the main heat exchanger. Troubleshooting tips in RED should be done by your local professionals at Texas Water Heaters. Cleaning the air intake filter is the only solution to fix the air pressure issue. Navien error code 003 how to fix indicates that there is an ignition failure in your unit. Error Code E353 It means there is some issue with a water pressure sensor. Navien error code E783 means there is a problem with the operation of the OT-remote controller. It is the most infuriating problem with the brands older models. If water is supplied by auto feeder valve open over 5 minutes, the error (E351) is detected and displayed on the front panel. Link to water pressure sensor:https://amzn.to/3m5OzujFULL DISCLAIMER: I am not a plumber or HVAC tech. It serves a big house. For the Navien boiler error code 10e, youre probably looking at an issue related to the air pressure. This is where its at right now. After about 15 minutes, one of the cast iron taco circulator pump, second from the right started leaking so I turned the heat off altogether on each floor. If required, replace the thermistor. He bled the system of air and brought the pressure back (Now its at 31.5 psi) and everything started working great. I was getting heat on the rest of the three zones without any issue. In addition to that, check whether the igniter is producing a spark. Theres nothing worse than turning on the tap and getting cold water when you were expecting hot. When they both stop working, it indicates that there is some major issue with the device itself. You can find it in the lowest corner opposite the on and off button. So, it will be worth reading the article. Flush the heat exchanger. Continue with Recommended Cookies. Navien error code E785 means there is a problem with the operation of the external flow switch. If you have an older heater, replace the flow sensor with the newest one; otherwise, install a 5-micron filter in the unit. Founded by Hubert Miles, Certified Master Inspector. 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. I went to the 2nd floor and bled the radiators again, came downstairs and boiler was on and the pressure was around 2o psi. If the system was properly set to pressure when it was installed, somehow the pressure dropped. This is what the error code E046 stands for. FIX:Confirm properly grounded electrical cord. It drops overnight. Dont forget to check the wiring of the PCB. Otherwise, you must replace the pump. Our Texas master plumbing license number is M11171. Now, the question is- what does actually affect the air pressure of your Navien Tankless Water Heater? The flow sensors were made of substances that were prone to rust. When there is no heat, the unit displays pressure that consistently drops throughout the day unless we're using the hot water. To troubleshoot Navien error code E109, check and clean, if necessary, the air intake filter and the fan motor. If it does not turn on and off, you will see Navien error code 003 how to fix on the display screen. I've been conducting professional home inspections since 2002. In addition to that, you may also need to check the condition and wiring of the exhaust sensor, flame rod, and pressure sensor to ensure they are all in good condition. Its a bit of a complicated water heater issue. It means the cold water inlet 1 thermistor is not operating well. Get a fixed price quote in 20 seconds online here. If necessary, replace the sensor. It isn't uncommon for it to go up a bit when the boiler fires, but most of the expanding water should end up in the ET, and the pressure not rising much. We service all major tankless makes and models and specialize in Rinnai, Navien, A.O. CODE: E003PROBLEM: Ignition failure in your tankless water heater. Heating supply thermistor open or short circuit Call or Text Blue Conservations trained Navien specialists at 484-469-0718. False flame detection! Protect the water supply and water heating equipment with eco-friendly water treatment solutions. How to clear the error message from the display? When you see the Navien boiler error code e787, its telling you that there has been a problem during the manual reset process. Fault code e031 is an indication of an overheating of the burner. To troubleshoot this error code, check the water supply and circulators, the flow sensor, and the pump. Turn off the device for half an hour and confirm everything is working properly. All Plumbers are screened, licensed, and insured. You can read this article where I broke down how to clean those two water heater elements. 1/2" gas pipe capability up to 24' (subject to local codes). It means that there is an issue with the air pressure sensor. Abnormality in limit control! To fix and troubleshoot Navien error code E016, switch the unit off for 30 seconds and then back on. I am sure some of you have expeirenced this. 8 years. 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. Examine and confirm the pressure sensor and wiring are in good condition. FIX:Confirm proper grounding of electrical cord. When an error code occurs, youll likely hear an audible beeping alarm. But the problem came again in two weeks. I've been told the heat and domestic water are separate. Navien error code E787 indicates that there has been a problem while the unit has been reset. 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. On the Navien NPEA2 Tankless Water Heater, the error code E012 stands for flame loss. Our finance provider will do a credit assessment of your circumstances when you apply. An open or shorted sensor causes the Navien error code E407. Auto RESET. Just remove the front panel of the unit and get the recirculation pump. Coast-to-Coast Coverage 7 days/week, 363 days per year. It tells you about the abnormality of the external tank thermistor. Check and ensure the water pressure sensor and wiring are in good working condition, and there are no loose connections. Check the sensors connectors to ensure they are installed correctly and are not wet. The display will change between S value (supply temp) to P value (pressure) in normal water heater operation. An open or short thermistor can be the root cause of this problem. Turn off the device and examine the APSs condition. Well, it is a logical query if your unit is powered by propane fuel. Abnormal operation: flow sensor Reset the boiler from the front panel. 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. Efficient, durable and high-performance products for any commercial application. CODE:E445PROBLEM:Abnormality in bypass mixing valve. They operate 1.5X better than traditional tank storage machines. If necessary, replace them all. On your Navien Tankless Water Heater, the fault code e438 indicates the recirculation pump is operating abnormally. CODE:E782PROBLEM:Abnormality in main panel communication. It's a pretty normal rise if it's cast iron radiators. CODE:E438PROBLEM:Abnormality in circulation pump. We and our partners use cookies to Store and/or access information on a device. Ensure they are in good condition and properly connected to the PCB. Navien error code E012 means there is a flame loss. Check the high limit switch, the 3-way valve, and the PCB. Even with the best equipment, sometimes things may not go as planned. If this was installed and the supply valve was left in the "open" position (a lot of people shut off the supply to the auto-fill), it, too, should have topped off the pressure to around 12 psi. If necessary, replace the thermistor. Some problems can be resolved by simply resetting the machine, while others will need further effort. Like any other home appliance, your tankless water heater will surprise you with an unexpected Navien error code 110 eventually. If necessary, replace the cold water inlet thermistor. CODE:E110PROBLEM:Abnormality in air pressure. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. Navien error code E004 is an indication that the unit is detecting a false flame. Navien error code E407 is a sign of a problem with the hot water outlet thermistor. Check if the flow switch is in the off or on position and the thermal blocks resistance. To fix Navien error code E001, you may need to clean the strainer and flush the heat exchanger. Change the thermistor if needed. Secondly, check the flow sensor condition and clean it if scale forms on the sensor. Initially, their products were not good enough and suffered numerous unexpected problems, but now they have stepped up, and glitches have become less frequent. If the problem persists, call a technician to fix the unit. Check direction of the internal 2-way valve. This error code may be fixed by switching off the unit, draining the water to release the pressure, and switching it back on. Just do what the corrective action you need to take to erase the code. Make sure there are no loose connections. The answer is- dirty air intake filter. I'm still confused why your plumber would say that the heating side should somehow match city water pressure. Reset the boiler from the front panel. Turn off the device for 30 minutes and then restart it. I'm absolutely stumped. Lastly, adjust the water pressure or fix the issue responsible for low water pressure. You can contact a plumber if necessary. If the dual venturi wiring connection is not correct, check the wiring and fix it. If you are using an old Navien model, here are some problems that you may have to deal with in the future or have experienced already. However, I don't want to keep the filter in bypass while we're home as the water is unsafe to drink. Next, ensure the dual venturi is working properly. To troubleshoot and fix Navien error code E012, confirm that the main gas valve is open and the gas pressure is within spec.
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