Navien water heater dhw wait

Inflation Reduction Act Tax Credits. The Inflation Reduction Act of 2022 makes federal income tax credits available for Energy Star certified tankless water heaters and heating boilers. Use the residential and commercial rebate finder below to see if your local utility company offers a rebate in your area, as well as available federal tax ...

To Troubleshoot cold water mixing with hot water. 1. Turn the unit off. 2. Close the isolation valves to the cold-supply and recirculation lines. 3. Open the pressure relief valve. If water comes out from the pressure relief pipe, this indicates that the issue is not with the unit but with the house's plumbing.2. Remove the access panel on the front of the unit. 3. Locate the reset button (it will likely be red) and press it for three seconds. 4. Replace the access panel and turn back on the power at the breaker box. 5. Test your unit to see if it is now working properly. Navien tankless water heaters can be reset by pressing and holding the "reset ...Navien's NHW-160AE non-condensing outdoor tankless water heater for commercial & residential applications uses high-efficiency technology to provide endless hot water. ... Domestic hot water: 10,700 - 160,000 BTU/h (3.135 - 46.88 kWh) Efficiency ratings: Efficiency rating for NG & LP (UEF)Endless hot water without cold-water sandwiches. NHW-A are the only non-condensing tankless water heaters with a built-in recirculation pump and buffer tank, providing hot water on demand more quickly while eliminating the cold-water sandwich effect. Long lifespan. NHW-A is built from durable components, including a stainless steel gas burner ...Navien combi boilers can provide whole house heating for small to large homes, and endless hot water for up to 3 showers and a dishwasher at the same time. With heat inputs up to 199,000 BTU/H, our combi boilers are also compatible with a variety of whole house-heating systems including: Finned tube baseboards. Cast iron baseboards.We would like to show you a description here but the site won't allow us.The water will start to get warm, then just go cold. The DHW is set to 112 degrees, but when checked, it now shows up to 170 degrees! The thermostat for the house heat is off, so it should not be getting nearly that hot, especially when I am not getting any hot water. I have been doing research all over, and at my wits end with this thing.NPE-240S2 premium features and benefits. 2" PVC venting up to 75 feet. Low exhaust gas temperatures allow use of PVC (including schedule 40 PVC), CPVC, polypropylene (rigid and flexible) and stainless steel venting saving time and costs.Vent Installation Detector (VID) for added safety. Dual Venturi for field gas conversions.

The calculation of DHW demand is made taking into account a DHW outlet temperature of 55ºC, the estimated number of people and their daily consumption taking into account the nature of the building. In the case of buildings for tertiary use, the reference value for daily DHW consumption per person changes according to the nature of use.NPE-A Plumb Easy 3 Valve Set. Part Number: (30022163A) Residential Neutralizer (V2) Part Number: (GXXX002212) Replacement Media. Part Number: (GXXX001323) PeakFlowS™ SCALE PREVENTION SYSTEM. Part Number: (GPWC110001AC001) Navien's water heaters, boilers, hydro-furnaces & water treatment solutions provide innovative high-efficiency technology ...Discover high-efficiency tankless gas water heaters in condensing & non-condensing models, providing endless hot water on demand and lower gas utility costs.Partner replaced a 1969 American standard gas boiler and dying water heater with a Navien NCB 240 Combi Boiler. Heat was fine from Feb thru April. Off for last 5 months, DHW works very well at all times. Cold snap and expected heat to come back on without issue. Heard it "click on" when I lifted the lever on the thermostat.The Pump Excercise feature is intended to periodically activate the pump to ensure the water will be circulated and to also ensure the pump seals will not dry out. The default Excercise setting will activate the pump for 30-seconds every 24-hours, but the activation time is adjustable to between 1-240 seconds, and the interval is ajustable to ...Navien's water heaters, boilers, hydro-furnaces & water treatment solutions provide innovative high-efficiency technology for residential & commercial projects. ... Navien Condensing Boiler Domestic Hot Water Ratings; Model 1 NCB-240/130H; Input Ratings: Min: 13,000 BTU/h: Max: 199,900 BTU/h: Other Domestic Hot Water Specifications;Navien Inc. (Headquarters) 20 Goodyear Irvine, California 92618 Phone: 800-519-8794, 949-420-0430 Navien America Inc. (Branch Office) 325 Route 70 EastNHW-160AI premium features and benefits. ComfortFlow® built-in recirculation system. The patented ComfortFlow® system is the first to include a buffer tank, recirculation pump and fine-tuned controls into a tankless water heater. NHW-A Built-in control panel. Allows you to adjust water temperature, operation status and troubleshooting.

Speak to our friendly customer service. 1-800-359-1334. Email Us. Purchase Navien 30007878A DHW Cold Water IInlet Filter. Navien 30007878A DHW Cold Water IInlet Filter SKU: 30007878A. Genuine Navien Factory OEM Repair Part Read More. $9.95 / ea. In Stock Ships Next Business Day.View and Download Navien NHB H Series installation and operation manual online. NHB H Series boiler pdf manual download. Also for: Nhb-055h, Nhb-080h, Nhb-110h, Nhb-150h, Nhb-h series. ... DHW control 1. Supply water method 2. Page 109: Setting The Display Options Press the Back button ( ) to return to the previous Item Description screen or ...NCB-250/150H. Max HTG Input: 150,000 BTU/h. Max DHW Input: 210,000 BTU/h. Indoor wall-hung. Residential. View model. NCB-250/150H. Navien’s NCB-250/150H condensing combi-boiler for residential applications uses high-efficiency technology to provide heat & endless hot water.Navien guys, what is this M icon w/ circular arrows? Options . ... If the "M" is displayed on your water heater, it means that your water heater is the Master unit of the cascade system. ... 1.9K Domestic Hot Water; 5.2K Gas Heating; 92 Geothermal; 160 Indoor-Air Quality; 3.2K Oil Heating; 59 Pipe Deterioration; 851 Plumbing; 5.8K Radiant ...Navien 30012033B Dhw Flow Sensor. ... We were experiencing intermittent cold water from our 9 year old Navien NR-240A tankless hot water heater. We even have the recirculation loop to keep hot water in the pipes every 30 minutes. ... In recent months, every time I went to do dishes at the kitchen sink, I would have to wait for an extremely ...Should a Navien hydronic heating system turn on and off four to five times an hour? I am living in a place with a Navien CH-240 that drives domestic hot water and an in-floor, six-zone hydronic heating system. The hydronic system uses PEX tubes under a concrete floor. I have only ever had forced air and typical water tank heaters before.

413 razzberry budino strain.

Endless hot water without cold-water sandwiches. NHW-A are the only non-condensing tankless water heaters with a built-in recirculation pump and buffer tank, providing hot water on demand more quickly while eliminating the cold-water sandwich effect. Long lifespan. NHW-A is built from durable components, including a stainless steel gas burner ...Sep 16, 2021 · We recently moved into a new build 3 floor townhouse that is using the Navien NPE-240A for the water heater and have been experience many issues related to water. 1. Water pressure is very low at the shower faucet (ie. it was measured at about half the PSI it usually should be). 2. Water takes a long time to get to a hot temperature at any ...500 * 2 GPM * 70 f Degrees = 70,000 btu/hr. for 3 gpm it is. 500 * 3 GPM * 70 f Degrees = 105,000 btu/hr. Also hot water is instantly available from indirect, a combi needs to start heating water before you have hot water unless it is a model with some internal storage.Start by turning off the power and water supply. Then, locate the condensate drain and check for any clogs or leaks. Use a pipe cleaner or brush to clean out any debris and ensure the drain is clear. If there are any cracks or leaks, use the plumber's tape or sealant to repair them.May 16, 2024 · This system is not specifically designed to be a boiler system but rather it is engineered as a whole house tankless hot water system. The Eco 27 would need to be added to a separate hydronic boiler system, requiring additional wall space. The cost for the Eco 27 domestic whole house tankless heater is less than the cost of the Navien NCB 240 ...Navien is a brand famous for producing some of the best tankless water heaters on today’s market. It produces high-quality units that rarely experience any issues. Related: Is Tankless Water Heater Worth It. Navien Tankless Water Heater Troubleshooting

The only way to increase the gpm output of the Navien is to decrease temp rise. gpm = btu/hr divided by (Temp Rise x 500) 5.7gpm = 199,000/ (70 x 500) 4.4gpm. = 199,000/ (90 x 500) Used 50 degree incoming water temp, your climate worse case maybe different. Temp rise is the difference between the incoming cold water temp and the setpoint.Find Navien accessories and parts kits for venting & termination, plumbing, Wi-Fi control & field service for tankless water heaters, boilers & combi-boilers. Where to buy. Residential. Residential Products. Efficient and earth-friendly products designed for any size home. Overview. Tankless Water Heaters. High-efficiency condensing and non-condensing …Is your Navien tankless water heater shutting off unexpectedly? Watch our step-by-step guide to troubleshoot and fix the issue, ensuring a continuous hot wat...Both the radiant heat and the domestic hot water work correctly but my concern is that the machine room is super-warm all the time -- the room made is hot by the (uninsulated) heat-exchanger return pipe from the hot water tank -- it is _always_ very warm to the touch. ... Navien Tankless Water Heater (NCB-240E) Not Igniting Due to Low Flow Rate ...A condensing tankless water heater extracts the additional heat internally. The acidic water is neutralized either by being filtered or diluted before it is drained outside. A non-condensing tankless water heater vents the steam outside, where it can cool outside the tank.. Some features of Navien's condensing and non-condensing tankless water heaters include:David Stewart. Hours:(Daily) 7AM-9PM. Telephone:(208) 758-5570. Email: [email protected]. Navien - Water Heater Age Lookup. Compare your serial number to determine the age of your unit. If you would like to suggest an edit or update to this site, please email comments to [email protected]. DISCLAIMER.www.Navien.com. 20 Goodyear Irvine, CA 92618 800-519-8794 www.Navien.com. T Check Valve. Circulator. Pressure Relief ... NPE-A Series Tankless Water Heater. G H. C. Gas Domestic Cold Water Condensate Domestic Hot Water ... Domestic Hot Water Domestic Recirculation Return. 20 Goodyear Irvine, CA 92618 800-519-8794 www.Navien.com. TThe Navien NCB 240 Tankless Water Heater solves all those concerns. Technical Specifications. Dimensions - 17 inches (43.2 cm) x 12 inches (30.5 cm) x 28 inches (71.2 cm) ... However, there are a couple of products that come into view that are similar to the Navien NCB domestic hot water system.NPE-210A2 premium features and benefits. 2" PVC venting up to 75 feet. Low exhaust gas temperatures allow use of PVC (including schedule 40 PVC), CPVC, polypropylene (rigid and flexible) and stainless steel venting saving time and costs. Vent Installation Detector (VID) for added safety. Dual Venturi for field gas conversions.Optional on-demand recirculation system for Navien NPE-A2 condensing tankless water heaters. At the push of a button, the Navien HotButton activates the internal recirculation pump and gas fired burner to heat water in supply lines. This gives your customers hot water when they need it, saving water and money. Learn more about NPE-A2 Series.Some of the combi boilers run short cycles to keep the DHW heat exchanger hot all the time. This reduces the hot water wait time. The burner would light off however if it is trying to maintain the HX A few of the Lochinvar combis allow you to choose between cold start and always hot. Maybe look for that setting and toggle it off, if it is enabled.

Press and hold the reset button: Using a small tool or your finger, press and hold the reset button for about 5 seconds. Keep holding until the unit's display starts flashing or shows the reset process has begun. Wait for the reset process to complete: Allow the heater to go through the reset process.

We also recommend that you report any maintenance at 800-519-8794, option 2 or option 3. If you purchased a Navien product from an online retailer, it may not be covered under Navien’s limited warranty even if it was installed by an authorized Navien installer. Please see our Limited Warranty for details. Navien's water heaters, boilers ...Navien water heaters are known for their efficiency and reliability. However, like any appliance, they can experience issues over time. Regular maintenance is essential to prevent ...a global leader in high efficiency water heaters and boilers. Whether you need an endless supply of hot water, efficient home heating or both, Navien has the perfect energy efficient solutions. Navien offers the industry's most advanced condensing tankless water heaters, condensing boilers and the first combi-boilers strong enough to support ...Feb 23, 2014 · Ive seen what you describe. In domestic water heating mode, the closed side heating pressure increases, kicks off the relief valve and unit shuts off. after about two minutes it refills and restarts. Could be other issues but this happens a lot on the install of this unit by contractors that don't understand boilers.We would like to show you a description here but the site won’t allow us.In a Navien tankless water heater, the burner cycle purges all the remaining air out of its combustion chamber. Since this task is done at the end of the cycle, it is known as post purge. Post purge helps remove all unburnt fuel remaining in the ignition chamber. And that prepares the unit for its next ignition cycle.April 26, 2023 by David. Navien tankless water heater standby mode means that your heater has power and it’s operational but it’s not currently heating any water. The heater goes into this mode when there’s no demand for hot water to save energy. The newer generation of Navien heaters has made it really easy to know when you’re in ...

Tn dachshund rescue.

Broan 690 upgrade kit lowe's.

Capable of common venting up to 7 NPE water heaters Built-in 3 zone pumps and 3 zone valves powered connections 2" venting up to 65' and 3" venting up to 150' ... Navien Condensing Boiler Domestic Hot Water Ratings; Model 1 NCB-240/110H; Input Ratings: Min: 13,000 BTU/h (3.8 kWh) Max: 199,900 BTU/h (58.6 kWh)Their average prices for supplied and installed tankless heater are between $1,950 to $3,400, depending on the model you choose, an outline of models, model features and codes are provided further down the page. For the remainder of this guide we will cover: The Navien Brand and their Range of Tankless Water Heaters.How to check and change your Navien tankless water heater DIP switch settings and parameter settings. I wanted to get the most efficiency out of my Navien W...The Intelligent preheating on Navien Water Heater is a self-learning process that you can enable by turning on the DIP switch on the front panel. Once you turn that DIP switch, the water heater software will monitor the flow demands over a 7 day cycle and recirculate the water from the following week based on water usage.10 Tips on How to Increase Temp on Navien Tankless Water Heater. 1. Locate the Control Panel. Locate the control panel or remote controller for your Navien tankless water heater. The control panel is typically located on the side of the appliance, while the remote controller is often found near a wall outlet. 2.Navien Premium Efficiency condensing tankless water heaters are the #1 selling high efficiency condensing tankless water heaters in North America. The NPE-2 series offers ultra-high efficiency up to 0.96 UEF to keep your utility bills low, endless hot water, and exclusive ComfortFlow® technology with a built-in recirculation pump and buffer tank.My Navien tankless water heater started having issues a few days ago. It won't stay lit enough to continue heating water - Answered by a verified Plumber. ... It starts up fine. A few seconds later it goes into post purge and then DHW wait It has been working fine almost an year. Installed in February 2023Optional NPE-S2 recirculation valve. Designed for recirculation of domestic hot water in applications where a dedicated return line is not available. External pump neccessary not included. Part No. PFFW-001, NaviCirc Kit: 30022965A. External recirc pump and check valves not included.To reset your Navien tankless water heater, follow these step-by-step instructions: Locate the power button on the front panel of your Navien tankless water heater. Press and hold the power button for 5 seconds until the screen turns off. Wait for 10 seconds, and then press the power button again to turn the unit back on.NCB-E Installation & Operation Manual. Product Downloads > NCB-E Installation & Operation Manual. Download file. Email file. Copy link. Home. Close. Navien's water heaters, boilers, hydro-furnaces & water treatment solutions provide innovative high-efficiency technology for residential & commercial projects.Navien products are backed by a limited warranty that covers labor, parts and the heat exchanger. For more details, select a product using the menu above, call 1-800-519-8794 for customer service, or start a live chat. Find warranty information for Navien tankless water heaters including warranty period, service & return policy, claim ...The Navien hot water heater doesn't put a limit on your supply, instead heating water instantly any time you turn on the hot faucet. With a Navien Tankless Hot Water Heater, such as the Navien 240 there is no limit on your hot water. Incredibly efficient, they are designed to heat water in seconds, and only when it is needed. ….

HYDRO-FURNACE. Navien Resale Policy - Consumer purchases through the internet or other e-commerce channels shall void Navien's warranty. >> Warranty Terms . Navien's water heaters, boilers, hydro-furnaces & water treatment solutions provide innovative high-efficiency technology for residential & commercial projects.Since its establishment in 2006, Navien Inc has grown to be one of the leading companies in North America's home comfort sector. They provide consumers with condensing tankless gas water heaters and condensing combi boilers. Their products use state-of-the-art technology and have high efficiency and reliable quality. But although their products are built to suchLearn how to adjust the recirculation settings on your Navien Tankless Water Heater for instant hot water and improved energy efficiency. This step-by-step t...The H2Air Kit utilizes the NPE-A2 pump to circulate the hot water for the hydronic air handler. This removes the need to purchase an additional circulator for the heating system. Designed for retrofit and new construction, the Navien H2Air Kit™ includes an add-on controller to integrate space heating and DHW between any NPE-A2 series tankless ...This is a part of the unit that ‘exchanges’ gas for heat and warms the water up, without getting in direct contact with water. It is one of the more important parts of the device. If you notice Navien tankless water heater goes cold all of a sudden, chances are you are having issues with the heat exchanger. Unfortunately, this is another ...Is your Navien tankless water heater not producing hot water as expected? Watch our step-by-step guide to troubleshoot and fix common issues yourself. Learn ...Find brochures, manuals, guides, labels, specs, drawings, revits & certificates for Navien NPE-210S condensing tankless water heaters. Where to buy. Residential. Residential Products. Efficient and earth-friendly products designed for any size home. Overview . Tankless Water Heaters. High-efficiency condensing and non-condensing tankless …The cold water pipe coming from the wall goes into the domestic water inlet on the tankless heater, as it should. However, the plumber branched this off into the circulation water inlet. Is this correct for the function of the system? When attempting a flush of the system, I shut off the hot and cold valves that lead into the heater. Navien water heater dhw wait, Find brochures, manuals, guides, labels, specs, drawings, revits & certificates for Navien tankless water heaters, boilers, combi-boilers & more. Where to buy. Residential. Residential Products. Efficient and earth-friendly products designed for any size home. Overview. Tankless Water Heaters. High-efficiency condensing and non-condensing …, Endless hot water without cold-water sandwiches. NHW-A are the only non-condensing tankless water heaters with a built-in recirculation pump and buffer tank, providing hot water on demand more quickly while eliminating the cold-water sandwich effect. Long lifespan. NHW-A is built from durable components, including a stainless steel gas burner ..., Navien Water Heaters. 1 Results Brand: Navien. Sort by: Top Sellers. Top Sellers Most Popular Price Low to High Price High to Low Top Rated Products. Get It Fast. ... Same-day water heater installation is available Monday-Friday in most areas. Learn More. 0/0. Related Searches. 40 gal electric water heater. heat pump water heater., The calculation of DHW demand is made taking into account a DHW outlet temperature of 55ºC, the estimated number of people and their daily consumption taking into account the nature of the building. In the case of buildings for tertiary use, the reference value for daily DHW consumption per person changes according to the nature of use., high efficiency Condensing Combi-Boiler. 95% AFUE – Energy Star certified. DHW 15:1 TDR and heating 13:1 TDR. 2” venting up to 65’, 3” venting up to 150'. Advanced controls with intuitive user interface and Setup Wizard. NEW DHW module with mixing and water adjustment valves. Built-in powered connections for 3 zone valves or 3 zone pumps., We also recommend that you report any maintenance at 800-519-8794, option 2 or option 3. If you purchased a Navien product from an online retailer, it may not be covered under Navien's limited warranty even if it was installed by an authorized Navien installer. Please see our Limited Warranty for details. Navien's water heaters, boilers ..., You should descale your Navien Tankless Water Heater once or twice a year depending on the water hardness. To descale a tankless water heater, you need to run a cleaning solution like vinegar to remove the gunk buildup. Read this article on Navien Tankless Water Heater Maintenance to learn the step-by-step descaling procedure., Navien water heaters are known for their efficiency and reliability. However, like any appliance, they can experience issues over time. Regular maintenance is essential to prevent ..., Navien NPE-240A2. Navien premium efficiency advanced condensing tankless water heater with built-in recirculation pump and buffer tank. Annual Operating Cost: Navien Tankless: 179.0 therms CA$250*. 189 Liter Tank: 293 therms CA$409. *Based on Energy Guide cost estimates using CA$1 per therm of natural gas., This innovative accessory will make cascading up to 16 units in 2 banks of 8 easy for emergency same day replacements. The kits are configures in 2, 3, and 4 side-by-side and 2, 4 back- to-back allowing for up to 16 units in 30 configurations. Each kit includes: * 3/4" Service Valves with PRV * 3/4" NPT Ball Valve * 2" Copper End Cap * 2 ..., Optional NPE-S2 recirculation valve. Designed for recirculation of domestic hot water in applications where a dedicated return line is not available. External pump neccessary not included. Part No. PFFW-001, NaviCirc Kit: 30022965A. External recirc pump and check valves not included., 1)Two heating zones each with its own circulator pump-is a Navien zone control. mrpaiken said: I've had a Navien NCB-240/130H combi boiler now for two months. DHW is fine. Two heating zones each with its own circulator pump. The house is only 1,300 square feet. Zone 2 is fine, but the other, Zone 1, is set for 69 and can't maintain temps more ..., 2. Water Heater Goes Cold. Examine the heat exchanger: Remove any debris or blockages that may be affecting the heat exchanger's performance. Verify the gas supply: Confirm that the gas pressure is within the acceptable range and there are no obstructions in the gas line. 3. No Water Flow., Jul 28, 2023 · Press and hold the reset button: Using a small tool or your finger, press and hold the reset button for about 5 seconds. Keep holding until the unit’s display starts flashing or shows the reset process has begun. Wait for the reset process to complete: Allow the heater to go through the reset process., 6 days ago · Learn how to adjust the recirculation settings on your Navien Tankless Water Heater for instant hot water and improved energy efficiency. This step-by-step t..., No waiting for a tank to reheat more water, wasting time and energy. NPN & NHW-A series are the only non-condensing tankless water heaters to offer NaviTech™ stainless steel heat exchanger and stainless steel burner for …, Navien Resale Policy - Consumer purchases through the internet or other e-commerce channels shall void Navien's warranty. >> Warranty Terms . Navien's water heaters, boilers, hydro-furnaces & water treatment solutions provide innovative high-efficiency technology for residential & commercial projects., 1. Press the M (menu) button on the front panel and choose the 1. Recirculation Settings by pressing down the OK button. 2. Press either the Up and the Down button to switch between any of these recirculation settings: No Recirculation: This option is used to disable the recirculation feature., NPE-240S2 premium features and benefits. 2" PVC venting up to 75 feet. Low exhaust gas temperatures allow use of PVC (including schedule 40 PVC), CPVC, polypropylene (rigid and flexible) and stainless steel venting saving time and costs.Vent Installation Detector (VID) for added safety. Dual Venturi for field gas conversions., Solar water heaters could help cut your utility bills. Visit HowStuffWorks to learn about solar water heaters. Advertisement Heating up water accounts for a good chunk of a home's ..., I find tankless water heater reviews aren't as common online as appliance reviews or rankings. Most of the time it's a water company's opnion piece on the product rather than consumer reviews. My water heater installer recommends the Navien brand of tankless water heaters, and for my house (2 bathroom bungalow) he recommends the 180,000 …, high efficiency Condensing Heating Boiler. 13.2:1 TDR. 95% AFUE - Energy Star certified. 2" venting up to 65', 3" venting up to 150'. Advanced controls with Intuitive user interface and Setup Wizard. Built-in powered connections for 3 zone valves or 3 zone pumps. Common venting up to 8 units and cascading up to 16 units., Customers are pleased that hot water comes out of the tap almost instantaneously, and gas water heaters (the majority of them) make little noise. The only negative aspect of Navien water heaters is that they tend to be pricey, typically costing around $1,200. This makes the heaters more expensive than other options., Once water turns off it shows msg of post purge and then DHW-wait ... I have a NAVIEN NR-210 Tankless Hot Water Heater (18 month sold) . I am having continued issues with the display going to 10 Degrees and the red light coming on.The unit then does not "fire" and the w ..., The H2Air Kit utilizes the NPE-A2 pump to circulate the hot water for the hydronic air handler. This removes the need to purchase an additional circulator for the heating system. Designed for retrofit and new construction, the Navien H2Air Kit™ includes an add-on controller to integrate space heating and DHW between any NPE-A2 series tankless ..., This is how to perform basic maintenance on a Navien NPE, NPN or other series tankless water heaters. While models numbers may vary, the basic steps for mos..., My Navien 240a2 tankless hot water heater is stuck in standby mode. I have unplugged it for 20 minutes, plugged it back in. I have done the Navien reset as well. we have gas, we have water. I have che, Find brochures, manuals, guides, labels, specs, drawings, revits & certificates for Navien NPE‑A Series condensing tankless water heaters. Where to buy. Residential. Residential Products. Efficient and earth-friendly products designed for any size home. Overview. Tankless Water Heaters., Low Water Pressure. It's normal to hear a banging noise come from the water heater when the system pressure is low. It's not the fault of the heater but the water pressure. Ideally, the water pressure should be somewhere between 12-15 PSI. You need to check the water pressure to determine if this is the issue., Navien NHB boilers offer homeowners industry-leading turndown ratios, longer venting and cascading capabilities for greater installation flexibility, and easy-to-use integrated controls. Good for small & large homes. Low noise. Up to 15:1 turndown ratio. Built-in capability for multiple zones. Cascade up to 16 units., Power the unit back up and wait for 30 minute to see if the unit starts heating again. Control Board Is Malfunctioning. If you notice your Navien’s control board is malfunctioning (for example, it’s not displaying at all, the device is not properly functioning, etc.) then it is likely the control board that needs to be replaced., To obtain warranty repair service, the end user or homeower must contact the original installer of your Navien product. If the original installer cannot be identified, the end user or homeowner may contact Navien's Technical Administration Department at (800) 519-8794. Proof of purchase is required to obtain warranty service., Navien Resale Policy - Consumer purchases through the internet or other e-commerce channels shall void Navien's warranty. >> Warranty Terms . Navien's water heaters, boilers, hydro-furnaces & water treatment solutions provide innovative high-efficiency technology for residential & commercial projects.