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We're on a water well and have a fairly robust water filtration system that I believe IS causing low pressure is the house. About 2 years old. Abnormal operation: main panel communication Call or Text Blue Conservations trained Navien specialists at 484-469-0718. The motherboard or control board failure is widespread. How to clear the error message from the display? You get great new boiler deals with next-day boiler installation. However, it will be best if you call a certified technician. The burner may get overheated if it gets filthy with fuel residue. If water is supplied by auto feeder valve open over 5 minutes, the error (E351) is detected and displayed on the front panel. FIX:Confirm properly grounded electrical cord. Then, remove the screw that holds the air intake filter in its place. An open or shorted sensor can cause Navien error code E353. It means there is some issue with the flow sensor or switch. If yes, you must replace the dual venturi. The unit generally pops this fault code on the display if you dont plug the unit into a properly grounded electric outlet. If the error persists, check the condition of the sensor. PROBLEM: Abnormality in circulation pump. To fix this issue, just replace the limit control switch. If needed, call a licensed technician. If you get a reading below 1.0 Ohm, understand the limit control itself is at fault. [Gas, Electric, Tankless Water Heaters Complete Guide 2021], 3 Cons Of A Tankless Water Heater? If needed, replace the controller or the sensor. Reset the unit and check the PCB and the condition and the wiring of the exhaust sensor, flame rod, and pressure sensor. If needed, replace the sensor. You can find it in the lowest corner opposite the on and off button. Just turn the unit off and remove the front panel. Protect your water supply and your water heating equipment with eco-friendly water treatment solutions. If any particular ad is your REASON for blocking ads, please let us know. My [Navien NCB-240E] [LP] keeps losing pressure and throwing an error code. I have the same unit. If your unit is generating lukewarm water, try to increase the temperature. Hi everyone, hoping you guys can help me. Next, check the resistance of the high limit switch. The E593 code means there is some issue with the front panel key. Navien error code E782 indicates a communication error within the main panel. An open or shorted sensor causes the Navien error code E432. Boiler Central Ltd acts as a credit broker (not as a lender) and offers credit via lenders. 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. Street pressure must be connected to the 1/2" thread connection on the bottom and left turned on. Thirdly, you must replace the fan motor if you dont get sufficient voltage at the fan motor. Navien error code E515 indicates an issue with the PCB. Clean the strainer and flush the heat exchanger if needed. 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. This guide will discuss and go over the Navien tankless water heater error codes, their meaning, troubleshooting, and more. It shows that the DIP switch setting has some problems. Like any other home appliance, your tankless water heater will surprise you with an unexpected Navien error code 110 eventually. CODE: E434. They incorporate innovative technology and are highly energy-efficient.But, they are not perfect, and problems do occur sometimes. If there is water flow, clean and inspect the condition of the flow sensor connector. To fix the Navien error code E593, you need to inspect if the panel keys operate as they should. Water overflows through condensed water hose. Locate the reset button on the heaters front control panel. In this case, check the voltage on the fan wiring connection (black and yellow wires). Put it back and activate the unit. The Navien CH has a built-in electronic feeder. Have a check of your manual to determine what pressure your boiler should be to see if this might be causing the issue. Examine and clean the filter in a cold water inlet. The domestic hot water (DHW) does run at street pressure. This is what the error code E046 stands for. I found the pressure drops 1psi everyday, but not in daytime. The error code E445 tells about the defect of the bypass mixing valve. In this case, you should replace the check valve. Abnormal exhaust temperature. 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. Theyll be able to work out precisely what might be causing the problem and suggest ways of getting it fixed. CODE:E109PROBLEM:Abnormality in fan motor. I'm absolutely stumped. If you have an older heater, replace the flow sensor with the newest one; otherwise, install a 5-micron filter in the unit. And lastly, verify the recirculation pump is working normally. FIX:Turn off the water heater for 30 minutes and restart. Now I pressed the reset button and the PSI displayed 4.1. They told me to call a contractor and have him/her take a look at it and go from there. Obviously, it is not a pleasant experience, but it will help you figure out what is wrong with your unit. Error 351 usually has to due with your water pressure in the system. Before replacing the recirculation pump, verify whether the pump is functioning properly or not. Theres nothing worse than turning on the tap and getting cold water when you were expecting hot. 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. NPNU Series They had me do a reset and then shut off the unit by plugging off and then plugging back in. Call 800-519-8794 to get in contact with Navien technical assistance. 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. 2.) This error code may be fixed by switching off the unit, draining the water to release the pressure, and switching it back on. On the other hand, if the dual venturi doesnt open and close continuously, I bet the controller is the culprit. Measure the pressure sensors output voltage and ensure it is within range. Manual RESET. Check and clean the cold water filter and strainer, and flush the heat exchanger. . To fix it, check the thermistors condition and wiring. You also have to flush the heat exchanger. Thats where our fixed price quotation service comes in as an excellent way for your needs to be assessed and recommendations to be made. Why is Your Water Heater Leaking From Overflow Pipe? I just discovered the issue this morning. It normally occurs due to an open or shorted sensor. Error Code E441 And E445 The error number E441 indicates that there is an open thermistor or a short circuit in the system. Check and remove the intake filter from the heater. High water pressure Call or Text Blue Conservations trained Navien specialists at 484-469-0718. 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. CODE:E046PROBLEM:Abnormality in limit control. 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. 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. Have a look in your manual for instructions on how to do this for your boiler because the method can vary between models. Make sure there are no loose connections. Ther are other lesser know brands with similar issues that arise. FIX: Confirm the main gas supply valve is open. It's a pretty normal rise if it's cast iron radiators. If the error code E109 pops up on the front panel display, understand the fan motor is operating abnormally. Then, locate the flame rod next to the blower. Make sure the electrical cord is grounded. We service all major tankless makes and models and specialize in Rinnai, Navien, A.O. 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. 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. Abnormal Auto feeder valve (make-up water) Call or Text Blue Conservations trained Navien specialists at 484-469-0718. 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. Cuts installation time, no need to install new gas lines for retrofit applications. Secondly, make sure the fan receives electric power for powering on. Lastly, adjust the water pressure or fix the issue responsible for low water pressure. For a better experience, please enable JavaScript in your browser before proceeding. It looks like you're using an ad blocker. Navien error code E205 indicates a problem with the operation of the heating supply thermistor. Navien error code E001 is caused by an overheating heat exchanger. They told me to call a contractor and have him/her take a look at it and go from there. The limit control is a safety feature, which is also known as a high limit control switch. To fix this error code, inspect the heating return thermistors condition and the pump wiring connectors. Consequently, it causes your water heater to flash the code e004. Ensure the flow rate and the PCB voltage at the pump are within spec and that the water circulates properly. Bad wiring to the water adjustment valve or the valve itself is defective is the reason behind this water heater issue. Apparently the pressure is low and need to fill up. In addition to that, check whether the igniter is producing a spark. 2021 Complete GuideContinue, If your water heating system is not warming water properly, you may have a rusted or conceded thermocouple. Condensing combi-boilers deliver high-efficiency endless hot water and space heating in one compact unit. 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. 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. All tankless water heaters will surprise you with an unexpected error code eventually. Make sure the major electrical cord is grounded correctly. Our Texas master plumbing license number is M11171. When you see the Navien boiler error code e787, its telling you that there has been a problem during the manual reset process. 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. We have a how-to guide for tankless water heater maintenance. The flow sensors were made of substances that were prone to rust. Once connected, our technician will be able to see what is occurring, pause video, draw on the screen, and save photos. You might have a pressure reducing valve if your city water pressure is really high. Press the reset button to reset your device. An open or shorted sensor causes the Navien error code E407. If this occurs, the boiler initiates shutdown. You can replace the sensor if needed. Complete Guide 2022Continue, Do you want to know how much propane does a tankless water heater use? When they both stop working, it indicates that there is some major issue with the device itself. Heating return thermistor open or short circuit Call or Text Blue Conservations trained Navien specialists at 484-469-0718. It means there is some issue with the OT-remote controllers operation. 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. CODE:E407PROBLEM:Thermistor open or short circuited (hot water outlet). Troubleshooting tips in RED should be done by your local professionals at Texas Water Heaters. Secondly, ensure you bleed the recirculation pump before operating it. NAVIEN E110 E351 error codes and tips and tricks on navien ncb-240e combi boiler. An open or shorted sensor causes the Navien error code E441. Navien error code E030 is caused by an overheating exhaust. Yes, these claims are valid. It indicates that there is something wrong with limit control. FIX: Confirm all water supply and return lines are open. Check that article out to learn how to clean and service the tankless unit. Fault codes e421 and e432 will flash on the front panel display when-. First, turn the unit off for at least 30 minutes. Given the circumstances could the filter actually be the culprit? If the wiring is okay, you must replace the water adjustment valve. Check the strainer and the heat exchanger. Navien error code E004 is an indication that the unit is detecting a false flame. Corrosion accumulation will become a cause of reduced operation. If necessary, call for a service. Navien error code E615 can indicate an input data error or a memory error. If the DHW cold water valve is open, check the connections and the water pressure sensor. If it does not turn on and off, you will see Navien error code 003 how to fix on the display screen. 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. Next, I suggest you check the flame rod to see whether scale forms on it or not. Navien error code E785 means there is a problem with the operation of the external flow switch. 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? To fix and troubleshoot Navien error code E016, switch the unit off for 30 seconds and then back on. Save my name, email, and website in this browser for the next time I comment. FIX:Confirm proper grounding of electrical cord. If your Navien displays an error code E352, you need to check the water pressure is within good rangers and check the activity of the feeder valve and the water pressure relief valve. Some problems can be resolved by simply resetting the machine, while others will need further effort. Even with the best equipment, sometimes things may not go as planned. 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. CODE:E740PROBLEM:Abnormality in outdoor temperature sensor. Navien error code E438 means there is a problem with the circulation pump. A+ rating! PSI was 4.1. Just want to make sure we're on the same page. When the air pressure is too high, then the system shuts down to prevent any further damage being done to your boiler. I was getting heat on the rest of the three zones without any issue. 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. CODE:E110PROBLEM:Abnormality in air pressure. CODE:E432PROBLEM:Thermistor open or short circuited (cold water inlet 2). If needed, replace the thermistor with new ones. On your Navien Tankless Water Heater, the fault code e438 indicates the recirculation pump is operating abnormally. I'm a licensed Home Inspector, Certified Professional Inspector (CPI), Certified Master Inspector (CMI), and FHA 203k Consultant. Otherwise, you must replace the pump. Bad check valves, a defective flow sensor, and bad pump are some reasons that cause the unit to pop up that error message. CODE:E445PROBLEM:Abnormality in bypass mixing valve. Navien heater. Hope New Member Messages 11 Reaction score 0 Points 1 Navien error code E445 indicates an abnormality in the mixing valve. Hot water outlet thermistor open or short circuit Call or Text Blue Conservations trained Navien specialists at 484-469-0718. We get it, but (1) terrylove.com can't live without ads, and (2) ad blockers can cause issues with videos and comments. Regarding this, use a multimeter and ensure it will give a voltage reading between AC 102-132V at the electric outlet. If yes, turn off the unit and dry the fan connector. And finally, verify the wire connection between the fan motor and the PCB is secure. An interesting observation is this all happened today early morning when I turned the heat on the second floor. CODE:E438PROBLEM:Abnormality in circulation pump. 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? An open or shorted sensor can cause Navien error code E740. 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. Abnormal operation: EEPROM Call or Text Blue Conservations trained Navien specialists at 484-469-0718. Abnormal operation: PCB Ensure that the electrical cord is properly grounded. Copyright 2020 - 2022 | All rights reserved. The Navien error code E445 is typically caused by a faulty feedback sensor, damaged, opened, shorted, or blocked mixing valve, or a defective PCB. Many contractors make the mistake of putting a boiler feed pressure reducing valve factory set at 12lbs. Another simple way to know if the venturi is working correctly or not- is to notice if the dual venturi opens or closes repeatedly. Cons Of a Tankless Water Heater? If the problem persists after reset, replace the APS as soon as possible. Initially, their products were not good enough and suffered numerous unexpected problems, but now they have stepped up, and glitches have become less frequent. I went to look at the unit and the same code E351 was there. 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. 1.) When there is no heat, the unit displays pressure that consistently drops throughout the day unless we're using the hot water. Nowadays, they utilize stainless steel that resists rust. In some instances, the dual venturi may need to be fully replaced to fix this error code. He bled the system of air and brought the pressure back (Now its at 31.5 psi) and everything started working great. If required, replace the thermistor. 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 To troubleshoot and fix Navien error code E030, switch the unit off for 30 seconds and then power it back on. Why Is My Liberty Pump Pro 380 Not Working? Navien NCB-240 Combi Boiler - DHW is fine, NO HEAT, "WWSD On Diff" - How it Works - Navien NCB 240-110H. Make sure there are no loose connections. This error informs you there is something wrong while you reset the unit. ^ No, he didn't. When the exhaust gets excessively hot (flue temperature exceeds 149 F), your water heater will shut down automatically to avoid further damage. 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.. CODE:E434PROBLEM:Abnormality in water adjustment valve. You can easily understand whether the dual venturi is operating correctly or not by running the water heater in dual venturi test mode. When buying a tankless water heater, we hope you find this guide helpful and will bookmark it for further reference. You can contact a plumber if necessary. Navien error code E434 means there is a problem with the water adjustment valve. 3. The same holds true for Navien tankless water heaters. If the error does not go away after resetting the unit, contact a licensed technician. This is also occurs from a power failure. You will be able to take action to resolve it at the right time. 1. Regarding this, get a multimeter and measure the resistance. 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 the error persists and everything looks good, call a licensed technician. It is that time again, and you are going to be purchasing a water heater. CODE:E004PROBLEM:False flame detection. 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. Check the left drain valve of the main heat exchanger. 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. The answer is- dirty air intake filter. 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. The flashing code e003 on Navien Tankless Water Heater indicates there is a problem with the ignition system. 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. Abnormal operation: flow sensor Reset the boiler from the front panel. I already covered a guide on Navien E438 Error Code. Condensing. Schedule Service Now Get Your Estimate. 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. CODE:E030PROBLEM:Exhaust overheating. Admirable Complete Guide, How Many Amps Does A Tankless Water Heater Use? If not, repair the electric outlet. CODE: E438. Error code E439 can be caused by a faulty flow sensor, PCB, or no cold water supply. If they get damaged, repair the wires. I was troubleshooting with Navien on the phone and psi was 8.1. This is the combi boiler, correct? With help of tech support we. And the boiler started losing pressure down to 5.8psi and displayed E351 code again. If necessary, replace the cold water inlet thermistor. Remove the intake filter and properly wash it using a brush beneath running water. Smith . Turn off the unit and check the valves wiring and condition. 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. Apparently the pressure is low and need to fill up. The number tells about the unusual operation of the Dual venturi. Clean or replace the igniter electrode or the PCB if necessary. If your Navien displays an error code E060, you need to check the dual venturi connection. If not, replace it. Error code E127 can be caused by an open or shorted APS. Turn off the device for 30 minutes and then restart it. Below we will offer you a breakdown of different Navien water heater error codes and their solutions. Check if the auto feeder valve works normally. 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. I started HomeInspectionInsider.com to help people better understand the home inspection process and answer questions about homeownership and home maintenance. Ignition Failure- Ensure that the main gas supply valve is open, False Flame Detection Ensure that the electrical cord is properly grounded. So, detach the grounding from the grounding terminal inside the unit and ensure the PCB is working normally. Confirm the thermistor and wiring is in good condition. It tells you about the improper operation of the flow sensor. PROBLEM: Abnormality in water adjustment valve. However, if you have tried everything but got no results, hire a plumber. CODE:E016PROBLEM:Overheated heat exchanger. Check and ensure the water pressure sensor and wiring are in good working condition, and there are no loose connections. , boiler lost pressure (down to about 4psi) and temperature and code E351 showed up again. Error code 351 was flashing on the LCD screen with a red wrench symbol as well. Check with the manufacturer for recommendations on water pressure.My specific unit is a Navien tankless water heater/furnace model NCB-240e. If not, it will not deliver enough water to the recirculation pump it requires. Whether you need a new water heater, a sink repair, or a toilet fixed We Can Help! Power supply grounding noise can cause malfunction. Navien error code E302 means that the water pressure is too low. Navien error code E594 indicates a partial PCB communication error or an EEPROM error. Exhaust Overheat: exhaust limit switch shuts down the unit. Hi, I keep getting an error message on my Navien machine : E351 Contractor's Assistant: How old is your Navien appliance or part?