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. I bet the following reasons are responsible for displaying the error code: First, visually inspect the wiring of the dual venturi and make sure it doesnt get cracked. I'm just not sure if anything can be done about this. Next, ensure the dual venturi is working properly. Ensure the flow rate and the PCB voltage at the pump are within spec and that the water circulates properly. Navien error code E205 indicates a problem with the operation of the heating supply thermistor. You can change the tank thermistor if needed. Check the high limit switch, the 3-way valve, and the PCB. Please switch off the unit for at least 30 seconds and ensure that everything works correctly, then power it back on. If by the end you think you need a brand new boiler then we can help with that too. CODE:E515PROBLEM:Abnormality in PCB. It shows that the heating return thermistor is not working correctly. Our Navien ncb-240e has an error code e.351. Examine and clean the filter in a cold water inlet. 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. The exhaust will get overheated because of a filthy cold water inlet or a dirty heat exchanger. Ther are other lesser know brands with similar issues that arise. On the Navien NPEA2 Tankless Water Heater, the error code E012 stands for flame loss. 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. Should be up around 12 psi (depending on your house--how many stories, etc.). Once you rinse the filter, dry it. There are a plethora of different Navien error codes e351 that may be used to assist in the resolution of the issue. Luis Satisfied Customers Expert Luis is online now Related HVAC Questions Navien problems. Make sure the major electrical cord is grounded correctly. Switch it off the unit and inspect the condition of the APS. CODE:E016PROBLEM:Overheated heat exchanger. Now, pull the flame rod wire and remove the flame rod. The unit should be between 15 and 25psi if you are below 10 the unit will lockout. NPEA2 Series > NPE-180A2 > NPE-210A2 > NPE-240A2. Just do what the corrective action you need to take to erase the code. 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. Thanks. You must log in or register to reply here. FIX:Confirm all water supply and return lines are open. An open or shorted sensor causes the Navien error code E407. 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 If you have no hot water, you may have overwhelmed your tankless water heaters capacity or have at least one error code. Apparently the pressure is low and need to fill up. 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. All of our technicians are licensed and insured. 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? Non-condensing. Inspect the water feeder valve, water pressure, and water pressure relief valve. Just as before, you may be able to fix this yourself by adding water to the boiler, which in turn increases the pressure. Turn off the unit and check the valves wiring and condition. In that article, I broke down every step to troubleshoot the unit for the error code e438. We have a how-to guide for tankless water heater maintenance. Ensure all return and supply lines are open and check the 2-way valves direction. Inspect and clean intake air filter. I'm still confused why your plumber would say that the heating side should somehow match city water pressure. If necessary, call for a service. CODE:E441PROBLEM:Thermistor open or short circuited (hot water inlet 2). If the error persists, check the condition of the sensor. Navien NCB-240 Combi Boiler - DHW is fine, NO HEAT, "WWSD On Diff" - How it Works - Navien NCB 240-110H. Thats where our fixed price quotation service comes in as an excellent way for your needs to be assessed and recommendations to be made. On your Navien Tankless Water Heater, the fault code e438 indicates the recirculation pump is operating abnormally. Navien error code E110 means there is an exhaust blockage. CODE:E593PROBLEM:Abnormality in front panel key. It shows that the DIP switch setting has some problems. The flashing code e003 on Navien Tankless Water Heater indicates there is a problem with the ignition system. Damage wiring to the thermistor at the hot water outlet can also create this problem. 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. We feature Rinnai Navien, and Rheem water heaters. Tankless water heaters last 20 years on average and during that time youre sure to have at least one of these Navien error codes. I just turned on the heating on the second floor again and 15 minutes into it, couldn't feel the heat. The domestic hot water (DHW) does run at street pressure. In addition to that, assess the condition of the intake air filter and clean it if necessary. Heats both domestic hot water and provides hydronic heating for the house? 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. If your system displays this code, you need to confirm the water pressure is within good ranges. The E593 code means there is some issue with the front panel key. Learn more about our products for home owners. If this occurs, the boiler initiates shutdown. Navien error code E002 means there is low pressure on the heating side. It will shut off the unit automatically when water temperature exceeds 197.6 F in the heat exchanger. So at this time, heat on the 1st and second floor was on and my baseboards and radiators were warming up nicely. Regarding this, reset the unit by pressing the Back button and ensure there is no call for heat. Obviously, it is not a pleasant experience, but it will help you figure out what is wrong with your unit. Flush the heat exchanger. Flush the heat exchanger. NPES2 Series > NPE-150S2 > NPE-180S2 > NPE-210S2 > NPE-240S2. 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. In some instances, the dual venturi may need to be fully replaced to fix this error code. Check if the flow switch is in the off or on position and the thermal blocks resistance. If needed, replace the thermistor with new ones. Below we will offer you a breakdown of different Navien water heater error codes and their solutions. Examine and confirm the pressure sensor and wiring are in good condition. I was troubleshooting with Navien on the phone and psi was 8.1. So, a couple of thoughts. Hi, I keep getting an error message on my Navien machine : E351 Contractor's Assistant: How old is your Navien appliance or part? Next, flush the heat exchanger to remove mineral deposits. Smith . Boiler Central Ltd provide finance via this website and is registered in England and Wales No 010483032 VAT Number GB351991381 Trading address is 100 Thornes Lane, Wakefield, WF2 7QX. If the error code persists after a reset, you may need to replace the APS. Basement Watchdog Battery Alarm Add Distilled Water, Every meaning of the common Navien error codes. Simply going through the reset process once more can often clear the problem and quickly have everything working again. It will be better if you call a certified electrician to inspect the outlet electrically. Navien error code E736 indicates a problem with the cascade communication. If this occurs, the boiler initiates shutdown". Auto RESET. Apparently the pressure is low and need to fill up. Otherwise, you must replace the pump. You can understand it by running a component test. An open or shorted sensor can cause Navien error code E353. Check the wiring and cold water inlet 2 thermistor and make sure both are in good condition. Blue Conservation provides on-call service as well as routine maintenance for tankless water heaters, high-efficiency boilers and combi-boilers in the Mid-Atlantic region, including Philadelphia, Eastern Pennsylvania, New Jersey, Delaware and parts of Maryland. Heat was already on in one of the zones on the first floor since last night. We don't tend to provide any plumbing advice or any advice that should come from a certified professional. Error Code E353 It means there is some issue with a water pressure sensor. Besides, the flame rod will fail to detect a flame if it gets covered with dirt, mineral deposits, or scale build-ups. Clean or replace the igniter electrode or the PCB if necessary. Call 800-519-8794 to get in contact with Navien technical assistance. Call for service if needed. Ensure you plug your water heater into a properly grounded electric outlet. 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. Besides, your Navien unit can also show the error message E001 if there is too much air in the recirculation pump. Check direction of the internal 2-way valve. This can happen because of dirty air intake filters. Nowadays, they utilize stainless steel that resists rust. Navien error code E016 means the heat exchanger is overheating. I've been told the heat and domestic water are separate. CODE: E438. I found the pressure drops 1psi everyday, but not in daytime. Complete Guide 2022Continue, Do you want to know how much propane does a tankless water heater use? My Navien keeps at 13.7 psi (cold) and bumps up to about 22 psi when the boiler is firing. But, that pressure has nothing to do with your heating. If the trouble persists, replace the control board or get in touch with the plumber for help. It means the cold water inlet 1 thermistor is not operating well. I've been conducting professional home inspections since 2002. Also, check the feeder valve and pressure relief valves activity. An open or shorted sensor causes the Navien error code E432. In about an other couple minutes, the heaters started warming up. CODE:E785PROBLEM:Abnormality in flow switch/sensor. The malfunctioning dual venturi is the culprit that causes your Navien water heater to pop up the error message E060. The limit control is a safety feature, which is also known as a high limit control switch. To fix it, check the thermistors condition and wiring. Navien error code E515 indicates an issue with the PCB. 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? So, it will be worth reading the article. In the case of an error code E438, you may need to replace the pump, flow sensor, or PCB. Check with the manufacturer for recommendations on water pressure.My specific unit is a Navien tankless water heater/furnace model NCB-240e. A+ rating! If the system was properly set to pressure when it was installed, somehow the pressure dropped. The Navien CH has a built-in electronic feeder. I'm absolutely stumped. Now, the question is- what does actually affect the air pressure of your Navien Tankless Water Heater? Check the thermistors condition along with pump wiring connectors. I have four zone heating. Efficient, durable and high-performance products for any commercial application. Just fixed the leaking pipe and bled the system of air and then turned on the manual feeder to up the pressure which was around 2/3 psi. Switch the tankless water heater off and inspect the condition and wiring of the valve. CODE:E782PROBLEM:Abnormality in main panel communication. Turn off the device and examine the APSs condition. A warranty covers the heat exchanger, so you should call the manufacturer. Navien is one of the ten largest Korean manufacturers, which is competing with LG, Samsung, Hyundai and others. FIX:Confirm there are no obstructions in the exhaust pipe. The answer is- dirty air intake filter. It's 12 degrees and I think the utility company is regulating the flow of gas. Add make-up water to the system if necessary. You can find it in the lowest corner opposite the on and off button. Do you want to know how to reset Navien tankless water heater? Some boiler faults are more common than others, no matter who the manufacturer is. Cons Of a Tankless Water Heater? I believe the error has happened when the filter is bypassed as well. You are using an out of date browser. Years of experience in the HVAC field have taught him many lessons, not the least of which is that the value of quality and knowledge far exceeds any promised initial savings. If your only pressure gauge is the Navien itself, it's worth adding another to always have a "second opinion", and to allow filling the system before powering up the boiler. So I am consistently getting an E351 error code (abnormal auto feeder) on my brand new Navien NCB-240E Combie.

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