Whether youre looking at Navien combi boiler error codes or those for your system boiler, some issues are going to come up more often. 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.. If not, replace it. Check that article out to learn how to clean and service the tankless unit. Copyright 2020 - 2022 | All rights reserved. A properly sized and operational expansion tank should keep the pressure fairly constant, regardless of whether the boiler is firing or not. Navien error code E004 is an indication that the unit is detecting a false flame. If needed, scrub it with a toothbrush. 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, measure the PCBs voltage and replace the fan if the voltage is within spec. Any help would be super appreciated as the plumber seems unwilling to discuss the issue of a faulty unit. 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]. The error code E736 informs about the issue in cascade communication, and error code E740 indicates that the outdoor temperature sensor is not working correctly. I'm just not sure if anything can be done about this. Navien error code E593 is caused by a problem with the operation of the front panel keys. 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. Modern tankless units are capable of creating limitless hot water to cater to whole-house needs. An interesting observation is this all happened today early morning when I turned the heat on the second floor. The burner may get overheated if it gets filthy with fuel residue. Check the thermistors condition along with pump wiring connectors. The Navien error code E445 is typically caused by a faulty feedback sensor, damaged, opened, shorted, or blocked mixing valve, or a defective PCB. PSI was 4.1. False flame detection! 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. An example of data being processed may be a unique identifier stored in a cookie. In just today. The Navien error code 110 informs about the strange air pressure. Then, pull out the cold water inlet filter from the unit and clean it. An open or shorted sensor causes the Navien error code E407. off. Lastly, adjust the water pressure or fix the issue responsible for low water pressure. An open or shorted sensor causes the Navien error code E432. Navien error code E002 means there is low pressure on the heating side. Turn off the device and examine the APSs condition. It can occur due to an open or short sensor. If yes, turn off the unit and dry the fan connector. Secondly, verify you plug your water heater into a properly grounded electric outlet. It drops overnight. The Navien boiler error code e302 also relates to low pressure in your system. There are several reasons why this might happen, including: So, this is one of those issues that does need an engineer to come out. CODE:E421PROBLEM:Thermistor open or short circuited (cold water inlet 1). Our finance provider will do a credit assessment of your circumstances when you apply. Overview. Navien error code E736 indicates a problem with the cascade communication. If water is supplied by auto feeder valve open over 5 minutes, the error (E351) is detected and displayed on the front panel. So my Navien had a code E351 along with the ranch sign on. 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. Abnormality in limit control! So, were going to take a look at those ones first and then at the end of the article youll find the complete list of Navien error codes. The domestic hot water (DHW) does run at street pressure. Protect your water supply and your water heating equipment with eco-friendly water treatment solutions. We feature Rinnai Navien, and Rheem water heaters. Confirm the thermistor and wiring is in good condition. Just today. I just turned on the heating on the second floor again and 15 minutes into it, couldn't feel the heat. On the Navien NPEA2 Tankless Water Heater, the error code E012 stands for flame loss. Seems like it probably wasn't--or is shut-off--otherwise it would have automatically brought the pressure back up to where it should be. Navien error code E003 indicates a failure in the ignition of the unit. Contractor's Assistant: How long has this been going on with your Navien? When the heat exchanger starts to crack, it means there is a gap, and destructive exhaust gasses could enter your residence. 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. Navien tankless water heaters and boilers for residential and commercial applications use innovative high efficiency technology to provide a comfortable environment. Just want to make sure we're on the same page. Navien error code E421 means there is a problem with the cold water inlet 1 thermistor. To fix Navien error code E046, check the condition of the wiring at the heat exchanger thermistor. It means there is some issue with a water pressure sensor. Abnormal operation: EEPROM Call or Text Blue Conservations trained Navien specialists at 484-469-0718. This is what the error code E046 stands for. Manual RESET. If your device is not working correctly and not displaying any error code, you can reset it. This error code can be caused by condensate blockage as well. If the wiring is okay, you must replace the water adjustment valve. Condensing combi-boilers deliver high-efficiency endless hot water and space heating in one compact unit. 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. Check the wiring and cold water inlet 2 thermistor and make sure both are in good condition. Inspect the water feeder valve, water pressure, and water pressure relief valve. This is where its at right now. If you'd like to support the site, please allow ads. The malfunctioning dual venturi is the culprit that causes your Navien water heater to pop up the error message E060. Navien error code E787 indicates that there has been a problem while the unit has been reset. To troubleshoot and fix Navien error code E012, confirm that the main gas valve is open and the gas pressure is within spec. Recently, in the summer, error code E351 happened once, then I open the auto feed valve to make up some water, the unit works again. Ignition Failure- Ensure that the main gas supply valve is open, False Flame Detection Ensure that the electrical cord is properly grounded. 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. The error code E441 informs about the open thermistor or short circuit problem. Change the thermistor if needed. When a problem arises, your device will exhibit an error code on its LCD on the front. Ensure the main gas supply valve is open. PROBLEM: Abnormality in circulation pump. Protect the water supply and water heating equipment with eco-friendly water treatment solutions. Check the sensors connectors to ensure they are installed correctly and are not wet. Thirdly, ensure you open the DHW cold water valve. If this occurs, the boiler initiates shutdown. Hope New Member Messages 11 Reaction score 0 Points 1 It indicates that there is something wrong with limit control. If necessary, replace the thermistor. On your Navien Tankless Water Heater, the fault code e438 indicates the recirculation pump is operating abnormally. It is not a common issue, but you should be aware of it. In most cases, the unit will flash this error message because of an electrically shorted thermistor. Navien error code E434 means there is a problem with the water adjustment valve. Navien error code E110 means there is an exhaust blockage. We and our partners use cookies to Store and/or access information on a device. He has a good standing reputation for superior skills in heating, air conditioning, hot water tanks, and indoor air quality systems. Pennsylvania Contractor #PA099038 / Home Improvement Contractor license. A place for homeowners, renters, tenants, business owners or anyone with a general question about their HVAC system. When you see this code on display, it becomes compulsory to grab information about how to reset Navien tankless water heater. 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. To learn how to clean the air intake filter, you can read this guide: Navien Tankless Water Heater Maintenance. 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. I've been told the heat and domestic water are separate. It is that time again, and you are going to be purchasing a water heater. Examine the thermistors condition and pump wiring connectors. However, if you have tried everything but got no results, hire a plumber. Otherwise, you must replace the pump. Founded by Hubert Miles, Certified Master Inspector. 2.) Navien error code E432 is a sign of a problem with the cold water inlet 2 thermistor. If the error code persists after resetting the unit, you may need to replace the air pressure sensor. CODE:E785PROBLEM:Abnormality in flow switch/sensor. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. here we have the Daikin error codes & Keston error codes, both brands that you may not have heard of but are great for people on the budget. Yes, this is the meaning of error code E004 on Navien Tankless Water Heater. So, replace the controller to erase the code e060. Now I pressed the reset button and the PSI displayed 4.1. It's usually during the day when it's warmer and we're also not home to use hot water. Also, check the intake air filter, the ground wire, power supply, and the wiring at the heat exchanger. You can change the cold water inlet thermistor if necessary. All Plumbers are screened, licensed, and insured. To fix and troubleshoot Navien error code E016, switch the unit off for 30 seconds and then back on. Turn off the unit and check the valves wiring and condition. It gives information about the low water pressure. Check with the manufacturer for recommendations on water pressure.My specific unit is a Navien tankless water heater/furnace model NCB-240e. A you hearing any sizzle, hum, or popping sounds just before it stops? Regarding this, use a multimeter and ensure it will give a voltage reading between AC 102-132V at the electric outlet. What have you tried so far? The E760 informs you that its time to flush your heater. Check direction of the internal 2-way valve. Abnormal exhaust temperature. Troubleshooting tips in RED should be done by your local professionals at Texas Water Heaters. If you feel uncomfortable, dont hesitate to contact the Technical Support at 1-800-519-8794. If it does not turn on and off, you will see Navien error code 003 how to fix on the display screen. Then, reinstall the filter and secure it with the screw. The original one was replaced about two years ago. As An Amazon Affiliate We Earn From Qualifying Purchases But This Does Not Affect Price Of Product. If your unit is generating lukewarm water, try to increase the temperature. Bad wiring to the water adjustment valve or the valve itself is defective is the reason behind this water heater issue. Condensing. Next, ensure the dual venturi is working properly. PROBLEM: Thermistor open or short circuited (cold water inlet 2). Well, it is a logical query if your unit is powered by propane fuel. Hi, I keep getting an error message on my Navien machine : E351 Contractor's Assistant: How old is your Navien appliance or part? It is the most infuriating problem with the brands older models. Check if the auto feeder valve works normally. This is what I did to correct the issue. It informs about the exhaust thermostats abnormality. Navien is renowned for producing high-quality water heaters worldwide. Navien error code E352 is indicative of high water pressure. How to clear the error message from the display? It is a temporary problem that can be fixed instantly. Below we will offer you a breakdown of different Navien water heater error codes and their solutions. If any particular ad is your REASON for blocking ads, please let us know. Bad check valves, a defective flow sensor, and bad pump are some reasons that cause the unit to pop up that error message. 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. Examine the wiring and thermistors condition. Yes, these claims are valid. Did a reset and turned off/on the unit, then turned on the red valve in the screenshot (posted earlier and denoted by arrow), that made the pressure climb up on the screen. Ensure there are no loose connections and the wiring is not damaged. Reset the unit and check the PCB and the condition and the wiring of the exhaust sensor, flame rod, and pressure sensor. The Navien error code E434 can be caused by an open or shorter water adjustment valve. All of our technicians are licensed and insured. Admirable Complete Guide, How Many Amps Does A Tankless Water Heater Use? FIX:Turn off the water heater for 30 minutes and restart. High water pressure Call or Text Blue Conservations trained Navien specialists at 484-469-0718. To fix this error, you may need to have a licensed contractor assess your units condition and replace the PCB if necessary. When I turn the faucet to hot the water pressure at the faucet doesn't change, but the system isn't heating. Turn off the power before removing the filter. If the dual venturi wiring connection is not correct, check the wiring and fix it. Navien NCB-240 Combi Boiler - DHW is fine, NO HEAT, "WWSD On Diff" - How it Works - Navien NCB 240-110H. Solution: Examine and confirm the pressure sensor and wiring are in good condition. Error code E127 can be caused by an open or shorted APS. CODE:E030PROBLEM:Exhaust overheating. CODE: E439. Navien error code E785 means there is a problem with the operation of the external flow switch. If not, it will not deliver enough water to the recirculation pump it requires. But, Read More How Much Propane Does A Tankless Water Heater Use? NPNU Series Clean or replace the igniter electrode or the PCB if necessary. To fix it, check the thermistors condition and wiring. You may also need to restart the unit to fix this error code. It detects the incoming water flow and then turns on the heater. So, detach the grounding from the grounding terminal inside the unit and ensure the PCB is working normally. Alternatively, you can contact the technical support team at 1-800-519-8794 for help. This code informs you about ignition failure. Navien error code E517 signifies a problem with the dip switch. FIX: Confirm all water supply and return lines are open. There are a huge number of distinct Navien error codes e351 that help with resolving the problem. In a minute or so, unit's pressure started climbing up from 8.1 PSI and now its at 17.1 PSI and the unit started and temperature was at where normally it is. The unit will shut down when the temperature in the flue exceeds 149 Fahrenheit (65 Celcius). It's not unusual for systems to lose a LITTLE pressure over time. Navien error code E012 means there is a flame loss. To fix this error code, inspect the heating supply thermistors condition and the pump wiring connectors. FIX:Turn off the water heater for 30 minutes and restart. To troubleshoot the Navien error code E782, inspect the condition and operation of the PCB. 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.

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