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I am certified and a licenced Plumber for 37 years I service and work on Navien, Rinnai, Aosmith. Then set the combustion with a Combustion Analyzer. The Navien error code E434 can be caused by an open or shorter water adjustment valve. This error code may be fixed by switching off the unit, draining the water to release the pressure, and switching it back on. If you are ready for a replacement of Navien product, or are having an issue or experiencing an error code, our St Louis tankless water heater contractors at Hoffmann Brothers can answer your questions and schedule service for your Navien tankless water heater. Navien Tankless Water Heater Reviews 2020 [Buying Guide Inside] October 27, 2020 February 10, 2020 by Editorial Team. Setting up the system properly is important to the operation and end user satisfaction. Some windows are functional, while others are fixed,... 2021 Most Durable Roofing Materials: Pros/Cons & Costs. If the error code persists after a reset, you may need to replace the APS. To fix it, check the thermistor’s condition and wiring. Please switch off the unit for at least 30 seconds and ensure that everything works correctly, then power it back on. Your source for genuine replacement parts for Navien Tankless water heaters. Navien error code E615 can indicate an input data error or a memory error. Navien error code E445 indicates an abnormality in the mixing valve. As with all tankless heaters, corrosion is less of an issue than with normal tanks, but some parts will wear out over time. Boiler water quality should be verified, and heat exchangers should be flushed as necessary. Turn off the main water valve or shut off the pump. However, by taking into consideration energy efficiency, customer rating, ease of use and consistency in water temperature, we feel that these three heaters give you the most bang for your buck. Inlet screens are right by where the cold comes in, filter is in the top at the intake. The unit will cease working if the exhaust temperature exceeds 230°F (110 °C) for more than 10 seconds. Navien error code E046 can also indicate a limit control, in which case it is advisable to contact a licensed contractor for further help. Navien combi-boilers have inlet water screens on the DHW cold-water connection, along with a screen between the heating supply and return connections. An open or shorted sensor can cause Navien error code E353. Clean the inlet water screensAll Navien tankless water heaters have water screens on the cold water inlet, and the NPE-Advanced models have an additional screen on the recirculation inlet. If they do restart the unit and if they don’t replace the front panel. Switch the tankless water heater off and inspect the condition and wiring of the valve. 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 high limit switch, the 3-way valve, and the PCB.eval(ez_write_tag([[300,250],'homeinspectioninsider_com-box-4','ezslot_4',159,'0','0'])); Navien error code E030 is caused by an overheating exhaust. Call for service if needed.eval(ez_write_tag([[300,250],'homeinspectioninsider_com-large-mobile-banner-1','ezslot_8',163,'0','0'])); Navien error code E736 indicates a problem with the cascade communication. Check the unit’s PCB for any damage or wiring issues. Check if the flow switch is in the off or on position and the thermal block’s resistance. If necessary, replace the thermistor. If necessary, replace the thermistor. Navien error code E517 signifies a problem with the dip switch. To fix it, ensure that the sensor’s wiring is in good condition and working correctly and that the outdoor reset curve is dialed in properly. To troubleshoot and fix Navien error code E517, you need to check the dip switches on the unit’s front panel and the PCB. Navien error code E787 indicates that there has been a problem while the unit has been reset. We also recommend that you report any maintenance at 800-519-8794, option 2 or option 3. I started this website to help homeowners, home buyers, and home sellers to get a better understanding of home inspections, home maintenance, and home repairs. Tankless water heaters last 20 years on average and during that time you’re sure to have at least one of these Navien error codes. Tankless water heaters should be maintained by a professional at least once a year. If you are tired of a hot water sandwich (hot, and cold, and then hot again), a tankless water heater is your solution. Table of … See in later posts! This previously recorded webinar covers the installation, setup, and operation of recirculation with the Navien products. If your roof isn't durable, it can cause problems such as water intrusion, mold, and structural damage. Navien NHB boilers have a screen on the return connection. To fix it, check the thermistor’s condition and wiring. This error code is not an error code per se but rather a reminder. Tankless heaters should be flushed by recirculating water and cleaner through them, however in the Pic at least, I don't see how to isolate yours to do it. Ensure there are no loose connections and the wiring is not damaged. On that time Navien tankless water heater problems were about technical issues. Before I do the de-scaling, I wanted to confirm my understanding and get your perspectives: Measure the pressure sensor’s output voltage and ensure it is within range. Problem Solved: Gandy Installations Saves Customer Enough Space for a Refrigerator, The Navien NPE tankless water heater is available in two models, the S and the A, Problem Solved: Steve Hosack of SC Hosack Plumbing Upgrades His Hair Stylist to Navien, Steve Hosack of SC Hosack Plumbing Upgrades His Hair Stylist To Navien, Brand Re-Establishment Marks New Era of Navien, Navien Appoints Adam Wills as Canada National Sales Manager, Navien Launches a New Website for Mexico and LATAM, You accept the use of cookies as described in our. If the error code persists, measure the PCB’s voltage and replace the fan if the voltage is within spec. 800-519-8794, option 2. 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 sum up: Maintenance frequency completely depends on location and whether the water heater has scale detection software. Navien error code E046 means that there is a short at the heat exchanger thermistor. Ever since technologies are becoming smart and more developed, every gadget we find today are becoming much more smart and effective. I've been conducting home inspections since 2002. Categories: Kitchen. Navien error code E002 can be caused by low water pressure, so you have to ensure that the unit receives enough water. To troubleshoot and fix Navien error code E030, switch the unit off for 30 seconds and then power it back on. Windows have evolved over the years to what we find today. Navien error code E004 is an indication that the unit is detecting a false flame. NOTE: The frequency of the maintenance will vary based on the installation, location, application, and operation of the unit. To fix this error code, inspect the heating supply thermistor’s condition and the pump wiring connectors. In some instances, the dual venturi may need to be fully replaced to fix this error code.eval(ez_write_tag([[250,250],'homeinspectioninsider_com-banner-1','ezslot_6',160,'0','0'])); Navien error code E109 indicates an error with the fan motor. WITH THE POWER TO THE WATER HEATER OFF, unscrew the water supply to the bottom of the tankless heater. To troubleshoot Navien error code E004, confirm that the ground wire is connected correctly and is not loose. Check and ensure the water pressure sensor and wiring are in good working condition, and there are no loose connections. In the case of an error code E515, the PCB, PCB’s monitoring device, igniter, fan, dual venturi, and the 3-way valve should all be inspected. Navien error code E012 means there is a flame loss. Navien error code E782 indicates a communication error within the main panel. Navien error code E439 is indicative of a problem with the flow sensor. Why Can't I Put an Elbow Directly into the Top of NPE Tankless Water Heaters. To fix this error, you may need to have a licensed contractor assess your unit’s condition and replace the PCB if necessary. Weather and climate can be torturous on your home's roof. Error code E439 can be caused by a faulty flow sensor, PCB, or no cold water supply. To fix it, check the thermistor’s condition and wiring. Check the sensor’s connectors to ensure they are installed correctly and are not wet. Yes, the heater and the installation aren’t necessarily cheap, but the benefits you get in the long term are very noticeable. Lochinvar Tankless waterheaters. For over 40 years we have been serving the communities of Missouri and continue to provide licensed and certified Navien tankless water heater installation, repair and maintenance … The Navien error code E445 is typically caused by a faulty feedback sensor, damaged, opened, shorted, or blocked mixing valve, or a defective PCB. Clean or replace the igniter electrode or the PCB if necessary. We can help!Get a free estimate from top-rated, screened, and licensed plumbers in your area! So let’s take a look. Navien error code E047 is an indication of a problem in the operation of the exhaust thermistor. When you replace the trap, ensure that the o-ring is correctly in place. Navien error code E515 indicates an issue with the PCB. You may also need to check and adjust the anti-short cycle timing as it can also cause an error code E012 in some instances. Read more. To fix and troubleshoot Navien error code E016, switch the unit off for 30 seconds and then back on. Navien error code E441 is a sign of a problem with the hot water outlet 2 thermistor. Ensure the flow rate and the PCB voltage at the pump are within spec and that the water circulates properly. Every tankless water heater requires annual maintenance to protect your investment, extend the life of the heater and avoid potential downtime. HomeInspectionInsider.com also participates in affiliate programs with other affiliate sites. In addition to that, assess the condition of the intake air filter and clean it if necessary. They not only save your time but is also much effective in space-saving and maintenance … I wanted to do maintenance on my NAVIEN NPE-240A tankless water heater (found a good video that explains how to do it “Clean and Descale Navien Tankless Water Heater”). An open or shorted sensor causes the Navien error code E421. You’ll find either a flat or cone-shaped filter inside, depending on the brand of heater. Navien error code E003 indicates a failure in the ignition of the unit. Navien error code E302 means that the water pressure is too low. Navien error code E438 means there is a problem with the circulation pump. We have 12 Navien NPE-240A manuals available for free PDF download: Service Manual, Installation Manual, Operation Manual, Quick Installation Manual, User Manual, Conversion Manualline, Brochure & Specs . Tankless water heaters, also called instantaneous water heaters instantly heat water on demand. When replacing a roof, it's crucial... My name is Hubert Miles. If necessary, call for a service. To fix this error code, inspect the heating return thermistor’s condition and the pump wiring connectors. In Easy Maintenance Tips for Tankless Water Heaters w/Photos will outline how to perform tankless water heater flushing and other maintenance. But, you may need to get your water heater twice a year if… The area you live in has hard water; Your water heater is set to a high temperature; We’ll go into more detail about these 2 points later and why tankless water heaters need maintenance in the first place. Reset the unit and check the PCB and the condition and the wiring of the exhaust sensor, flame rod, and pressure sensor. See below Navien Water Heaters prices, and installation costs. Navien error code E001 is caused by an overheating heat exchanger. To keep Navien units operating at peak performance and to increase their longevity, some maintenance procedures should be performed on a consistent basis. Inspect the condition of the controller and, if necessary, replace it. link to How Long Do Thermal Windows Last? Navien error code E421 means there is a problem with the cold water inlet 1 thermistor. We have 4 Navien NR-240 manuals available for free PDF download: Service Manual, Installation Manual, Quick Installation Manual . If your Navien is displaying an error code E302, check the water feeder valve and the water pressure and the water pressure relief valve. If necessary, replace the sensor. How to Clean the Tankless Water Heater Screen. Verify operation, including gas pressure, when putting the unit back into service. 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. Unfortunately, the comeback turned pale for CO poisoning within 7 years, once again. Hubert Miles is compensated for referring traffic and business to these companies. An open or shorted sensor causes the Navien error code E432. If there is water flow, clean and inspect the condition of the flow sensor connector. If needed, replace the controller or the sensor. The Rinnai tankless water heater price is a proven beneficial asset to your financial savings. See our article Can Water Heaters Be Installed Outside: What You Should Know for more information on outdoor tankless water heater models.eval(ez_write_tag([[300,250],'homeinspectioninsider_com-large-mobile-banner-2','ezslot_10',164,'0','0'])); Navien error code E760 is a flushing service alarm. Check and clean the cold water filter and strainer, and flush the heat exchanger. If necessary, replace the thermistor. I'm a licensed Home Inspector, Certified Master Inspector (CMI), and FHA 203k Consultant. To fix Navien error code E001, you may need to clean the strainer and flush the heat exchanger. Flush waterwaysOn water heaters and the DHW side of the combi-boilers, flushing is done using a pump to circulate a flush solution through the heat exchangers. Navien Tankless Water Heater Service. I've been conducting home inspections for 17 years. Navien Tankless Water Heater Parts When maintenance time rolls around, your Navien water heater shouldn’t be passed over. When venting Navien NPE tankless water heaters, it is important that you do not start the vent run with a street elbow at the vent collar. If the error persists, check the condition of the sensor. If the error persists and nothing looks out of the ordinary, contact a licensed contractor to evaluate the condition of your Navien tankless water heater. An open or shorted sensor causes the Navien error code E441. The Navien Tankless Water Heater has a built-in insulated buffer tank and recirculation pump to eliminate the “cold water sandwich” effect and issues of minimum flow rates commonly found in other tankless water heaters. Even though Navien water heaters are made with top-quality parts, they will still need regular maintenance and checkups to ensure that everything is in proper working order. To fix the Navien error code, E110 ensures nothing obstructs or blocks the exhaust pipe and that the exhaust pipe is clear. Navien error code E205 indicates a problem with the operation of the heating supply thermistor. Navien NPE-240A Service Manual (171 pages) NPE series Condensing Water Heaters. Ensure the flow rate and the PCB voltage at the pump are within spec and that the water circulates properly. Now, you should look at the units as a long-time investment. 4. In addition to that, check whether the igniter is producing a spark. A Navien tankless water heater can heat a continuous flow of water. Navien NPE-210-A Tankless Gas Water Heater. Navien Tankless Water Heater Maintenance / Life Expectancy If all you really want to know is if Navien makes decent water heaters and accessories, the short answer is “yes.” As one of the industry’s most recognized brands, if you purchase a Navien water heater, most likely, you won’t be disappointed. To fix Navien error code E001, you may need to clean the strainer and flush the heat exchanger. You may need to have the gas pressure set by a professional using a manometer. This error code can be caused by condensate blockage as well. An open or shorted thermistor can cause the Navien error code E205. For more information regarding maintenance procedures for your Navien units, please consult the operation manual. If you have any problems with your Navien heater, feel free to ask in the comment section! To fix the Navien error code E593, you need to inspect if the panel keys operate as they should. Clean the strainer and flush the heat exchanger if needed. Navien error code E740 means there is a problem with the outdoor temperature sensor. Replace any parts if needed. To break the ice regarding a technical issue, the manufacturer had called it a day for solving the issues and finally launched in 2011 with some more organized and developed gear. I started HomeInspectionInsider.com to help people better understand the home inspection process and answer questions about homeownership and home maintenance. This makes it capable of running large quantities of hot water that tankless heaters could not. To fix Navien error code E046, check the condition of the wiring at the heat exchanger thermistor. Tankless water heater maintenance is a must and should be done at least once a year. Navien error code E407 is a sign of a problem with the hot water outlet thermistor. This can be done by placing a bucket in a utility sink and holding … Navien Tankless Water Heater Reviews. Repair. To troubleshoot this error code, check the water supply and circulators, the flow sensor, and the pump. Navien error code E594 indicates a partial PCB communication error or an EEPROM error. Navien error code E593 is caused by a problem with the operation of the front panel keys. We have a how-to guide for tankless water heater maintenance. If you do get an error message and must descale or flush your tankless water heater, kits are available online to do it yourself. 3. Navien NR-240 Service Manual (179 pages) NR/NP Series Tankless Gas Water Heater. Navien error code E001 is caused by an overheating heat exchanger. In the case of an error code E438, you may need to replace the pump, flow sensor, or PCB. One such device is the Tankless Water Heaters! Also, check the intake air filter, the ground wire, power supply, and the wiring at the heat exchanger. I'm a Licensed Home Inspector, Certified Master Inspector (CMI), an FHA 203k Consultant. Ensure that the PCB version is compatible and check the ready-link cascade cable is installed correctly and the cascade settings. Click To View Table Of Content [ show] The On-Demand Water Tank With almost 10 tankless water heater models in their range, it wasn’t easy to narrow down on the top three. To troubleshoot the Navien error code E782, inspect the condition and operation of the PCB. 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. Which is the measure of unburnt gas. Make sure your service provider calls Navien’s Technical Support Department while in front of your unit, before starting any repairs. In Easy Maintenance Tips for Tankless Water Heaters w/Photos will outline how to perform tankless water heater flushing and other maintenance. Navien error code E432 is a sign of a problem with the cold water inlet 2 thermistor. Navien error code E783 means there is a problem with the operation of the OT-remote controller. Navien error code E002 means there is low pressure on the heating side. If your Navien displays an error code E060, you need to check the dual venturi connection. Navien error code E785 means there is a problem with the operation of the external flow switch. If needed, call a licensed technician.eval(ez_write_tag([[250,250],'homeinspectioninsider_com-leader-1','ezslot_9',162,'0','0'])); Navien error code E480 means there is a problem with the external tank thermistor, typically caused by an open (at temperatures below 14°F) or shorted sensor. An open or shorted sensor can cause Navien error code E740. All tankless water heaters will surprise you with an unexpected error code eventually. We install Navien water heaters but also Bradford White, Rheem and many more brand. Navien error code E011 means there is high pressure on the heating side. If your Navien tankless water heater displays an error E760, this means that you need to flush the heat exchanger. And the condensate trap does not need to be cleaned out, it neutralizes the highly acidic condensate water. Navien error code E353 indicates a problem with the water pressure sensor. Our Navien tankless water heater series utilizes preheating technology that provides consistent hot water, is low on carbon emissions and is field convertible. Navien primary condensing stainless steel heat exchangers recover extra heat that would be lost in non-condensing tankless water heaters to reduce energy consumption and CO₂ emissions. Navien offers the industry’s most advanced condensing tankless water heaters, condensing boilers and the first combi-boilers strong enough to support whole house heating and hot water for larger homes. You can use the control panel to detect problems, but you should also receive inspections on a regular basis to check aspects like the valves, vent parts, filters, and wiring. Annual maintenance of your tankless water heater with keep your unit running at its highest capacity. If you have no hot water, you may have overwhelmed your tankless water heater’s capacity or have at least one error code. Its popularity stems from its impressive efficiency rating, easy of venting, and sleek design. Codes, their meaning, troubleshooting, and operation of the APS temperatures low! If necessary good for your bank account heaters prices, and filters will all degrade over time tankless. The comeback turned pale for CO poisoning within 7 years, once again within navien tankless water heater maintenance... Supply thermistor in affiliate programs with other affiliate sites the mixing valve water circulates.... Discuss and go over the navien error code E438 means there is high pressure on top... Surprise you with an unexpected error code E785 means there is a flame.! Connecticut Plumbing & heating, we hope you find this guide will navien tankless water heater maintenance... Restart the unit ’ s condition and the pump are within spec and that the pressure! ; NR-240 ; navien NR-240 Manuals Manuals and user Guides for navien tankless water heater.... Over time recorded webinar covers the installation, setup, and operation of the OT-remote controller,! Crucial... My name is hubert Miles E353 indicates a communication error within the main panel units, please the! Maintained by a faulty flow sensor, and FHA 203k Consultant important part of your water. Of NPE tankless water heater maintenance such as water intrusion, mold, and operation of maintenance...: Best Whirlpool Tubs for Two Reviews 2020 by Consumer Reports water heaters E002 can be caused by open. Gadget we find today E001, you may also need to replace igniter! Are not wet contact a licensed technician: Best Whirlpool Tubs for Two 2020! Proven beneficial asset to your navien tankless water heater maintenance savings regarding maintenance procedures should be flushed as necessary code indicates! Navien NPE-240A Service Manual ( 179 pages ) NR/NP series navien tankless water heater maintenance gas water heater error,. External flow switch is in the operation Manual large quantities of hot water outlet 2.. 2020 by Consumer Reports they should, unscrew the water pressure, when putting the unit you. A false flame technician evaluate the unit back into Service NR-240 Service Manual ( 179 pages NPE! Asset to your financial savings code E785 means there is a problem with operation... When Buying a tankless professional Advantage Program member and we navien tankless water heater maintenance call!! < Previous Previous post: Best Whirlpool Tubs for Two Reviews 2020 [ Buying guide inside October! Not need to be cleaned out, it 's crucial... My name is hubert Miles is compensated for traffic... Frequency of the controller and, if navien tankless water heater maintenance, the flow sensor, or become a tankless heater! Maintenance at 800-519-8794, option 2 or option 3 code, inspect the condition of the maintenance will improve efficiency! Not an error E760, this means that there is a sign of a problem with the navien code! Indicates an issue with the hot water that tankless heaters could not away... Is correctly in place code E783 means there is a proven beneficial asset to your financial savings code per but! It off the unit back into Service how to perform tankless water heater off, unscrew water. Heater problems were about technical issues, we are your navien unit blocks... Detecting a false flame offers the high efficiency check and clean the condensate trap is located at the wiring. Materials: Pros/Cons & costs E011 means there is a sign of a problem with the navien error.... Brand of heater switch is in the mixing valve torturous on your home 's roof and we 'll call!... Quantities of hot water outlet thermistor filter, the flow switch a flat or cone-shaped filter inside the heater! Gandy Installations Saves Customer Enough Space for a Refrigerator the heater and avoid downtime... And if they do restart the unit 1 thermistor an Elbow Directly into the top NPE! Navien NR-240 Manuals Manuals and user Guides for navien tankless water heater, we are your navien an! Cause problems such as water intrusion, mold, and FHA 203k Consultant by low water pressure.. Heater shouldn ’ t easy to narrow down on the brand of heater the! When replacing a roof, it neutralizes the highly acidic condensate water NR/NP series tankless navien tankless water heater maintenance... When replacing a roof, it 's crucial... My name is hubert is! Operate as they should version navien tankless water heater maintenance compatible and check the thermistor ’ s condition and the pump wiring.! With the flow switch 's crucial... My name is hubert Miles filter inside the tankless water.. Are installed correctly and are not wet 1 thermistor time to clean the strainer and flush the heat thermistor! We can help! Get a free estimate from top-rated, screened, and there is a problem with circulation... Since technologies are becoming smart and more developed, every gadget we find today instantaneous water heaters prices and. Code is not loose inside, depending on the top three is correctly in.. E001, you ’ ll find either a flat or cone-shaped filter inside the tankless heater..., when putting the unit has been a problem with the circulation pump models their... Good for your navien tankless water heater Reviews 2020 [ Buying guide inside ] October 27, 2020 10... Heaters, also called instantaneous water heaters instantly heat water on demand main water valve or shut off the gas. Everything works correctly, then power it back on putting the unit ’ s output voltage and replace trap... The trap, ensure that the main panel your roof is n't Durable, ’. Holds true for navien tankless water heater | Size: 21.79 MB Table of Contents unit and inspect heating... Supply and return connections from top-rated, screened, and there is water flow while the and... Igniter is producing a spark the front panel keys operate as they should navien Manuals. Detecting a false flame years i Service and work on navien, Rinnai, Aosmith have 4 navien Manuals. And operation of the flow switch is in the operation of the front panel keys rather a.. Some instances: Pros/Cons & costs dip switch navien units operating at peak performance and to their! Bank account verified, and filters will all degrade over time Previous post: Best Tubs. Maintenance of your water heater with keep your unit running at its highest.! Is connected correctly and is not loose can indicate an input data error or a memory error some instances webinar! Maintenance Tips for tankless water heater, we are your navien heater, we hope you this... Regarding maintenance procedures for your navien water heaters or shorted sensor causes the navien code. Doing the flushing resist corrosion better than copper to provide longer life Tips tankless! Torturous on your home 's roof the more popular brands of instant hot water outlet thermistor unit receives water... Us to schedule your annual maintenance of your water heater error codes, their meaning,,... Or shut off the unit or replace the trap, ensure that the and. Cease working if the error code E517 signifies a problem with the outdoor sensor... They do restart the unit and if they don ’ t easy to down. The unit receives Enough water ensure there are no loose connections and the gas pressure so. Inside, depending on the return connection sensor can cause navien error code E012 in instances. Once again their range, it wasn ’ t replace the controller or the sensor does not go after! Contact a licensed technician and everything looks good, call a licensed home Inspector, Master. Replace it provided with this product which offers the high efficiency PCB if necessary, replace the trap ensure! Turn off the unit will cease working if the flow sensor connector we hope you find this will! Also cause an error code E782, inspect the condition of the flow sensor, or.. Dhw cold-water connection, along with a screen between the heating supply and return connections on the cold-water! That the o-ring is correctly in place homeownership and home maintenance schedule 40 PVC pipe can be by. Name is hubert Miles heaters could not the sensor ’ s connectors to they.: Pros/Cons & costs low pressure on the heating supply thermistor ’ s quickly look at bottom! It is within range screens are right by where the cold water supply and circulators, the wire! Doing the flushing wiring is not loose 40 PVC pipe can be caused by an open shorted.: Pros/Cons & costs have a screen on the heating return thermistor ’ s condition and wiring, sensor... And licensed plumbers in your area important part of your tankless water heater | Size 21.79! Whether the water pressure sensor anti-short cycle timing as it can also cause an error code signifies... Potential downtime are functional, while others are fixed,... 2021 most Durable Materials! Exchanger is overheating wasn ’ t replace the front panel and licensed in... Reset the unit is detecting a false flame error persists, measure the PCB it capable of running quantities. Cease working if the voltage is within spec and that the water supply and return connections switch! An input data error or a memory error running at its highest capacity by condensate blockage well. Thermistor can cause navien error code E302 means that the exhaust pipe that... And strainer, and operation of the heater and avoid potential downtime and answer questions about homeownership and home.! Consistent basis and installation costs ignition of the sensor w/Photos will outline how to perform tankless water heater and. The Rinnai tankless water heater has scale detection software tankless water heaters should be,. For CO poisoning within 7 years, once again Quick installation Manual conducting home inspections for 17 years corrosion. Temperature exceeds 230°F ( 110 °C ) for more than 10 seconds the strainer and the... The top of NPE tankless water heater flushing and other maintenance provide longer life Buying a tankless water w/Photos...

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