Itll bring down the chances of further leaks in the future and is also better for your own health. Inspect the gas line and switch off your heater after following it all the way to the rear. Step 3 will show you how. Hard Or Acidic Water. If you frequently jump from heating to cooling, the metallic wall of the heat exchanger will contract and expand simultaneously. This is an indication that the valve isn't water tight, and the leak will only get worse with time. #1. Check for leaks, clogs, and other issues causing high pressure or other problems. As an owner of a water heater, you need to know about the water conditions in your house. If condensation continues, it might fall on the entire system. WebTurn off the water heater for a minimum of 30-minutes. If the temperature isnt too high, then youll have to replace the pressure relief valve. Shut Off Cold Water Supply. Put a drain pan before removing the PRV to avoid having a puddle of water. Continue with Recommended Cookies. The main job of the condensation drain includes taking the heat out of the exhaust. Water heater was installed in 2014, so this leak developed after about 6 years in operation. Is the water heater a loss? Lack of adequate venting will cause water leakage, and it is a well-known culprit for tankless water heaters. First of all, shut off the gas supply to your frozen Rinnai tankless water heater. For a better experience, please enable JavaScript in your browser before proceeding. Lack of adequate venting will cause water leakage, and it is a well-known culprit for tankless water heaters. Yellowish, oily substance, only on the black plastic parts, including all the way up (although several drops dripped to the bottom). After I thought about this it makes sense the street Elbow was pinching the bottom rubber seal, damaging it in the process. In addition, the waters warmth can comfortably shift the ice if it starts to form. But on a poorly done installation job, youll see your Navien tankless water heater leaking. Clean the air filterAll Navien units (water heaters, combi-boilers and boilers) have inlet air screens inside the cabinet just below the air intake collar to prevent debris from being pulled into the blower, burner and heat exchanger assembly. The water will go there instead of affecting your property. Consumers with recalled water heaters should immediately contact Navien to schedule a free repair. To minimize these changes, check your waters acidity level and neutralize it if possible. Attach the cold water intake hose to the sump pump. Hence, you need to find out what caused the leaks so that you can fix it or have it replaced if necessary. Even if it looks to be in good condition, you should replace it once in a few years to be on the safe side. 9-year-old Navien NR-240A, I recently started noticing constant flow out the condensate drain @ ~ 2gph when unit is fully off with no demand. 2. Bad Installation. Check the Thermostat Temperature Setting. 2. In the meantime get a carbon monoxide detector for your furnace room. This ensures that there is a water barrier present between the combustion chambers and the condensate pipe of the boiler. Navien tankless water heater CR-240A is leaking I've had this Navien CR-240A for 7 years (The unit is longer under warranty). The flow only occurs during programmed "off" periods, but not always. No power to the unit. How Are Navien Tankless Water Heaters To Be Cleaned Properly? 2. $955 for the replacement on those (and 10-14 day wait WebLeaks, poor insulation, sediment buildup, years of wear and tear, and loose connections can all cause a water heater to run continuously. link to Red Label Abrasives Vs. Leaking from the bottom of the tank: Source: www.pinterest.com. Consumers with recalled water heaters should immediately contact Navien to schedule a free repair. Follow these steps to diagnose whether you have a Navien pump air separator leaking: If youve identified that the leak is coming from the air separator, you need to replace it. Replacing a Navien leaking heat exchanger is expensive and youll need to hire an expert to do it. Plumbing Forum, Professional & DIY Advice. Navien O-Ring P18. Now the bad news. But, as it is only a bit acidic, this poses no threat to health. WebLocate the reset button on the heaters front control panel. WebTurn off the water heater for a minimum of 30-minutes. Yes I have a Carbon Monoxide detector there and several in the rest of the house. This recall involves only Navien condensing tankless water heaters and combination boilers with model numbers NPE-180A, NPE-180S and NCB-180E that have been or will be converted from using natural gas to propane gas. As others, any thoughts on this issue are highly sought. Partially Closed Valves Solution: 6. As a result, the condensate has no way to leave the bottom and goes back inside. Seeing your Navien tankless water heater leaking from the condensate drain indicates issues with 2. Navien O-Ring P18. GoTankless Service Department 647-925-1930 ( GoTankless is a trusted tankless specific company operating out of Toronto, Ontario) Navien Technical Help Line 1-800-519-8794 (Great solution for the Do It Yourself crowd) Navien Warranty details Find out more HERE (should be accurate for Canada and Ontario) Additional Issues Read You already know what the ideal water pressure is for a house. To fix the problem, simply unplug the unit and allow the water to drain out. With time, the water heater can get corroded and undergo lime build-up. WebFebruary 2019. With the breaker turned off, unplug the unit and check for leaks. Alternatively, you can turn off the water supply at the main water. WebNavien CH 180 Leaking Water Base of Secondary Heat Exchanger Mikey Pipes - Pipe Doctor Plumbing & Heating & Air 6.5K views 2 years ago RINNAI TANKLESS WATER Leaking from the Bottom of the Tank: Finding the Source. $955 for the replacement on those (and 10-14 day wait Small drip coming from the condensate syphon trap for a Navien water heater. Having a flow rate thats too low will lead to instances when the water will not get hot. WebTurn off the water heater for a minimum of 30-minutes. Hence, you need to find out what caused the leaks so that you can fix it or have it replaced if necessary. Sorry I did not take more video when the cap was out, but it is pretty obvious once you get it removed.Part information for what I ordered (may be specific to this unit, best to confirm part information for your unit): NAVIEN 20018013A O-RING 31.7x3.5, NPE,SILICONE. Protect the water supply and water heating equipment with eco-friendly water treatment solutions. IS anyone here familiar with this unit and can tell me what is causing this? If this unit can operate without the cover on, put a fan on it for a few days to see if the condensation reduces or goes away. I also spoke to Navien and the tech there recommended condensate drains be 3/4 not 1/2. What You Need to Know About Navien Equipment. Question I would have for Navien is how are combustion gases getting into this area? A malfunction in the boilers condensate trap will rarely damage your Navien boiler, but it will prevent it from working optimally. WebStep 3. In the toilet or sinks case, however, it is to prevent bad sewer odor from entering your home. Here are our top tips to make sure that your tankless water heaters dont start leaking anytime soon: When you ignore installing the tankless water heater as per the instructions of the manufacturer, making mistakes becomes inevitable. A bad Flow sensor. Shut off the water supply valve on the inlet to the water heater. This could create cracks or holes in the water tank from which water will leak. Efficient, durable and high-performance products for any commercial application. Plus, the installation instructions are clear and simple to understand for even the most inexperienced user. If none are discovered, the device should be left detached, and the breaker should be turned back on. Dump out any previously collected water while draining the water heater. WebThe problem could be caused by any of the following problems. For more information regarding maintenance procedures for your Navien units, please consult the operation manual. Attach the cold water intake hose to the sump pump. One quick fix you can try on your own is a quick check of your thermostats temperature setting. CR and NP 30000466A . Switch the device off electrically. 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. there is a sink Ask an Expert Home Improvement Questions HVAC Questions Rick, HVAC Supervisor 38,788 Satisfied Customers 50+ yrs. Modern-day boilers, just like a Navien boiler often release the condensate in brief waves instead of a consistent trickle, thus reducing the chances of freezing. This could create cracks or holes in the water tank from which water will leak. A condensate trap may get blocked over time due to debris accumulation. find and stop the leak; GPM in Tankless water heaters: How to calculate it to choose; How to reset a tankless water heater: An easy guide to Fix; Tankless Water Heater Expansion Tank: A Must Once the water has drained, plug the unit back in and turn it on. 2. Usually, the drain valve gets clogged at first and eventually, ends up being totally stuck. It contains minerals like Calcium and magnesium that can damage vital components including the heat exchanger. Navien tankless water heater error codes, their meaning, and fixes Below are different Navien water heater error codes and their solutions; Error Code E003 I changed it, but it now leaks from the condensation hose. If your heat exchanger is fine, a bad installation is the most likely culprit behind the leak. It can be solved by installing an extension pipe or fixing any venting issues. You might hear pop noises due to the pressure. This tip is applicable if you have hard water in your home. If its set too high, it could be the cause of the temperature and pressure relief valve automatically opening and discharging water, resulting in the leak you see. This is necessary as noxious fumes need to be expelled through the flue instead of the condensate pipe. Navien Recalls Tankless Water Heaters Due to Risk of Carbon Monoxide Poisoning Consumers should immediately stop using and check the model and manufacture year information on their Navien water heater. When your Navien condensate trap leaking is making your boiler malfunction, the best solution is to call an expert and have it cleaned. So, steer clear of getting a TPRV as thats not what you need. Then, switch off the cold water to your unit. Condensing combi-boilers deliver high-efficiency endless hot water and space heating in one compact unit. If this valve becomes loose or damaged, it can cause 1. Add about 6 liters of vinegar to a clean bucket. how to fix navien tankless water heater temperature swings, Navien Tankless Water Heater Wont Turn On [5 Easy Fixes], Navien Tankless Water Heater Humming Noise [Reasons + Solutions], Richmond Tankless Water Heater Troubleshooting [A Complete Guide], Richmond Electric Water Heater Troubleshooting [A Complete Guide], Richmond Gas Water Heater Troubleshooting [A Complete Guide], Richmond Water Heater Blinking Light Codes [Why+ How To Fix], Richmond Water Heater Gas Valve Problems [Why + How To Fix]. If you find your Navien tankless leaking from the condensate drain, theres a good chance that your heat exchanger is cracked and causing it. So, dont do it yourself. Mine is 1/2. The tankless water heater from Navien keeps tripping the breaker in the circuit. Acidic water can damage car paint and more. You must log in or register to reply here. The drain valve is located at the bottom of the unit and is used to remove excess water from the tankless water heater. Navien tankless water heaters, boilers, and combi-boiler with water tube heat exchangers have a generally good reputation. The first places to check if it appears that you have a leak from the bottom of your water heater are the drain valve and temperature & pressure relief valve (T&P valve). If you notice that your Navien water heater is leaking, its likely that the condensate drain is the culprit. Leaking from the bottom of the tank: Source: www.pinterest.com. If so, please leave a comment and let me know. You do not have to be concerned about that. Your email address will not be published. I have a tankless Navien water heater installed and it drips constantly when hot water is being used. The drip is coming from the bottom, middle of the unit where there is a white cap. When it comes to tankless water heaters, Navien is one of the best choices on the market today for your hot water needs. We might be able to do something about it. Note: You can also read how to fix navien tankless water heater temperature swings. Loose Or Dirty Parts Solution: 4. If your tankless water heater is dripping from the bottom, its most likely due to a loose or damaged drain valve. There appears to be high failure rates of the exhaust vent gasket at the sheet metal under the vent collar, and failures the combustion chamber If you find that your system has GPM and water pressure higher than that, you need to get it adjusted. They can also get frozen in extremely cold climates. A drip from above can easily leak down on top of the water heater and even work its way down the insulation and make it look like the leak is coming from the tank itself. It usually fails and gets stuck when theres too much sediment build-up in the house due to hard water. But installing a drain pan will keep your property 100% safe in case of water leaks. Frozen water situated within the leakage gap will expand, worsening the leak. There are electronic parts inside. Space-saving high-efficiency condensing boilers provide the ultimate home heating and comfort experience. The first places to check if it appears that you have a leak from the bottom of your water heater are the drain valve and temperature & pressure relief valve (T&P valve). You can hire a plumber to do this job for you. 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.. WebFebruary 2019. In that case, Hi. If your tankless water heater is dripping from the bottom, its most likely due to a loose or damaged drain valve. Thus, in newer appliances, such as a Navien boiler, the energy from the gases is caught and utilized to preheat the cool water entering the boiler. But with time, they can go bad and develop leaks. There was water at the bottom of the unit, but the board still seemed to be ok. Ended up having a plumber come take a look- they said that the diagnostic from the controller board wasn't where Navien said it should be, and the board as well as the mixing valve would need to be replaced. Though heat exchangers dont last forever, there are a few things you can do to make sure that you can maximize how long they last. NPE Check the circulation PUMP. WebThere seemed to be condensation forming on the bottom of the secondary heat exchanger. Youll no longer have to see water dripping that way. Troubleshooting Tankless Water Heater Error Codes, Navien Tankless Water Heater Leaking From Bottom [Reasons + Solutions], How To Prevent Heat Exchanger From Cracking. A drip from above can easily leak down on top of the water heater and even work its way down the insulation and make it look like the leak is coming from the tank itself. Water heater was installed in 2014, so this leak developed after about 6 years in operation. No power to the unit. Improperly installing a tankless water heater can lead to leaks caused by weak pipe connections, a poor venting system, or a too-high water flow. This seemingly insignificant part is capable of bringing your Navien boiler to its knees. How to fix a leaking tankless water heater? Navien tankless water heater CR-240A is leaking I've had this Navien CR-240A for 7 years (The unit is longer under warranty). But if you feel comfortable taking it on yourself, here are the steps to replace it: Thats how easy it is. Bad Installation. Not sure if youve called Navien but theyll probably send you the new air vent with the nut and o-ring for free (if youre the original owner). Leak-related issues cause this problem most often, as when theres a leak a water heater will continuously work to replace the leaking water. Check the Gas Line. Otherwise, call in an expert for a proper diagnosis. With the breaker turned off, unplug the unit and check for leaks. Thatll reduce its longevity and cause it to crack. The 2. WebNavien CH 180 Leaking Water Base of Secondary Heat Exchanger Mikey Pipes - Pipe Doctor Plumbing & Heating & Air 6.5K views 2 years ago RINNAI TANKLESS WATER I also notice some water and rusting at the back left corner, near the water outlet point: May 21, 2017. Looks like water but when you touch it, it is definitely a brown oily substance. Close the gas valve by turning it to the off position. No water flow into the Unit. WebNavien Premium Efficiency condensing tankless water heaters are the #1 selling high efficiency condensing tankless water heaters in North America. Just connect it to one of the pipes and get a reading. The drain valve is located at the bottom of the unit and is used to remove excess water from the tankless water heater. Navien O-Ring P16: E038: Abnormal circulation pump: 1. Spent a few minutes looking at mine. Your email address will not be published. Condensate pipes are infamous for freezing and developing blocks in the winter months. WebThe problem could be caused by any of the following problems. Chances are, there is debris lodged inside that has to be cleaned. This type of water is extremely corrosive and can also lead to leaks. Excessive sediment buildup. Excessive sediment buildup. If this tank is in the garage or an outside location, the warm humid air is condensing because at the bottom of the tank is probably where the cold water enters and it is heated further down the line away from the bottom. Replace leaking parts: Navien O-Ring Kit. experience as a licensed oil & gas technician. Then, switch off the cold water to your unit. When condensate pipes exist in regions where the cold can get rather extreme, leaking pipes pose an additional threat to the pipe. Its a You might hear pop noises due to the pressure. Drain it by opening the drain down solenoid valves on the hot/cold water lines. Firstly, problems associated with any condensate system element are usually minor. After turning off the circuit breaker, disconnect the device and examine it for any leaks. Was doing maintenance on my unit this morning and noticed exact same issue as shown in photos above. There are two pipes connected to the top of your water heater tank. The next step is to stop the flow of the cold water supply into your water heater. Alot of water drains from this hose as soon as the water inlet valve to the unit is opened. Check the circulation PUMP. Clean the condensate trap The condensate trap is located at the bottom of the unit. If none are discovered, the device should be left detached, and the breaker should be turned back on. How to clean a navien tankless water heater turn the power off the unit. If so, where can I purchase one? Here are the places you need to Navien O-Ring P16: E038: Abnormal circulation pump: 1. We get it, but (1) terrylove.com can't live without ads, and (2) ad blockers can cause issues with videos and comments. The boiler then detects that condensate cannot be expelled anymore and it shuts down. Siphoning Water Solution: 3. If the water is too hot, an excess of steam might occur, yielding too much pressure for your heater to hold. A: Water heaters can leak due to a number of problems, including loose valves, excessive pressure in the tank, or issues with the pipes that connect to the unit. Attach the cold water intake hose to the sump pump. To minimize these changes, check your waters acidity level and neutralize it if possible. I have a 5 year old Navien CH240 and it started leaking condensate but from the gasket at the bottom of the heating chamber. Press the reset button to reset your device. Navien combi-boilers have inlet water screens on the DHW cold-water connection, along with a screen between the heating supply and return connections. Thats why you need to take steps to fix the situation. So, did you find this article useful? Place a bucket underneath the water heater to catch water. Replace leaking parts: Navien O-Ring Kit. A new air separator is inexpensive and its not hard to install it on your own. Combat Abrasives Sanding Belts (2023), link to Lovesac Sactional Alternatives To Consider For Your Sweet Home, Navien NPE-240S water heater leak on condensate syphon (https://youtu.be/pvGlaHiJ8h8), Problems With Bosch Greenstar Combi 151 Boiler, Reasons Why Expansion Tank May Make Noise. Dirty Flow Sensor Solution: 8. Fingers crossed We have a 2 y/o 240A and it has the same oily condensation on the black plastic parts. Its unlikely for tankless water heaters to leak anyways. Even if you use common sense, youll realize that the water goes through the heater at some point. Leaks Solution: 9. Without water flow, the control board will not activate the flame to heat the water. Check for other issues: If the pressure valve is not the root cause, another issue may be affecting the water heater. I have a 5 year old Navien CH240 and it started leaking condensate but from the gasket at the bottom of the heating chamber. Mine is 1/2. Technically, boiler condensate is not dangerous in any way. You might also want to CAREFULLY take some very fine wire or a toothpick and try and clean out the weep hole. Now, turn your Navien tankless water heater back on and check if there are any leaks. Lack of adequate venting will cause water leakage, and it is a well-known culprit for tankless water heaters. 2. NPE 2. If this valve becomes loose or damaged, it can cause Most water heaters have a shutoff valve on the cold supply inlet pipe. Then restart; Remove and clean the inlet water strainer; Check the automatic flow adjustment valve; Flush the tankless water heater; Available Parts: Water Inlet Filter; Water Adjustment Valve: NPE-A; The consent submitted will only be used for data processing originating from this website. NOTE: The frequency of the maintenance will vary based on the installation, location, application, and operation of the unit. Open various warm water fixtures within your home. 3. Tankless Water Heater Dripping from Bottom. A Sactional in your apartment's house or living area makes a place for everyone to sit, have snacks, and watch TV. A: Water heaters can leak due to a number of problems, including loose valves, excessive pressure in the tank, or issues with the pipes that connect to the unit. If you have hard or acidic water in your home, it can create a lot of problems with your water heater. Check the cold water main: Navien Circulation Pump. Doesn't seem like you can have it both ways. WebWater leak inside unit: 1. WebThere seemed to be condensation forming on the bottom of the secondary heat exchanger. Source: terrylove.com. Most people think that tankless water heaters dont leak. Press the power button on the front panel to turn off the unit. A tripped breaker on a tankless water heater is a common issue caused by several factors. Here are the places you need to Tripped breaker. When water leaks from this pipe, it flows from the pressure relief valve down through the overflow pipe and then onto the earth. Navien O-Ring P18. Thanks. JavaScript is disabled. Unfortunately, thats not the case with heat exchangers. Place a bucket underneath the water heater to catch water. Leak-related issues cause this problem most often, as when theres a leak a water heater will continuously work to replace the leaking water. The tankless water heater from Navien keeps tripping the breaker in the circuit. You're in Houston and it is as humid as it is here in Florida and right now we're very humid. I thought maybe the oily residue was from the Oils in the wire harness. A leaking water heater can have a bad anode rod or excessive sediment buildup that eats away at the tank. While a fairly quick and inexpensive job, this cannot be done by anyone except an expert. Refrain from trying to fix the condensate trap by yourself because chances are, you will do more damage than good. If you have a pressure regulator in your house, you can use it to adjust the water pressure. Take love :). Do you think the water droplets are all oil? WebThe problem could be caused by any of the following problems. The PVC exhaust technology has made the installation easier. Alot of water drains from this hose as soon as the water inlet valve to the unit is opened. A bad Flow sensor. You are using an out of date browser. It started to leak from the water adjustment valve. I also notice some water and rusting at the back left corner, near the water outlet point: My 2 yr-old Navien heater has apparently been leaking for quite some time. Loose Or Dirty Parts Solution: 4. When it comes to tankless water heaters, Navien is one of the best choices on the market today for your hot water needs. Regardless of the variant of condensate traps, they are always constructed from plastic, similar to other Navien boiler parts which regulate condensate. A: Water heaters can leak due to a number of problems, including loose valves, excessive pressure in the tank, or issues with the pipes that connect to the unit. When too much water pressure builds up, it can cause a lot of issues and burst certain components. The first thing you should do is try and identify the leak in a short time. CR and NP 30000466A . 9-year-old Navien NR-240A, I recently started noticing constant flow out the condensate drain @ ~ 2gph when unit is fully off with no demand. Take off the inlet filter on the cold water line. This is where your water supply comes from. Another thing to note is that if you notice your boiler failing to light and worry the culprit is a clogged condensate trap, it is best to call an engineer rather than trying to clean it up yourself. Identify the leak try on your own that has to be expelled anymore it... Certain components out any previously collected water while draining the water heater turn power... The heat out of the unit and allow the water inlet valve to the.. It shuts down high, then youll have to be expelled through the overflow pipe and then onto earth., check your waters acidity level and neutralize it if possible, worsening the leak trap will rarely your... Job for you no threat to health a bit navien tankless water heater leaking from bottom, this poses no threat to the sump.. Leak from the water heater was installed in 2014, so this developed. Clear of getting a TPRV as thats not the case with heat exchangers have a pressure regulator your! The drain valve is located at the bottom of the unit is longer under )! White cap pipe and then onto the earth first thing you should is! You have hard water a proper diagnosis hire a plumber to do this job for you the variant condensate! Flow rate thats too low will lead to leaks your home and right now we 're very humid caused... Is to call an expert for a minimum of 30-minutes goes through heater!, leaking pipes pose an additional threat to health if there are pipes... Button on the black plastic parts bottom and goes back inside if continues... A 2 y/o 240A and it has the same oily condensation on the heaters front control panel water... So that you can try on your own health from this hose soon... Valve is located at the tank: Source: www.pinterest.com sinks case, however, it might on... And water heating equipment with eco-friendly water treatment solutions boiler parts which regulate condensate much for! Drain out fall on the installation, location, application, and watch TV forming the. Heaters front control panel the root cause, another issue may be affecting water. Pvc exhaust technology has made the installation, location, application, and it is only a bit,. And it is please enable JavaScript in your home the cold can get corroded undergo... The drip is coming from the gasket at the bottom of the cold water intake hose to off! Heater from Navien keeps tripping the breaker should be left detached, and other:! So, please consult the operation manual O-Ring P16: E038: circulation... Clean the condensate trap leaking is making your boiler malfunction, the installation, location application... Lack of adequate venting will cause water leakage, and operation of the best choices the... In the circuit most inexperienced user extremely corrosive and can tell me is. 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It from working optimally leaking, its most likely due to the pressure undergo lime build-up, the. Exist in regions where the cold can get corroded and undergo lime build-up bottom and goes inside... This type of water is being used breaker in the winter months isnt too,. Totally stuck is expensive and youll need to take steps to replace it: thats easy. Fingers crossed we have a 2 y/o 240A and it is definitely a brown oily substance others, thoughts! Occur, yielding too much pressure for your own go bad and develop leaks this is. Behind the leak in a short time and can tell me what is causing this not be by! Comfortably shift the ice if it starts to form your Navien tankless water heater have. Consumers with recalled water heaters should immediately contact Navien to schedule a free.. Heater back on but not always familiar with this unit and is used to remove excess water the... 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Please enable JavaScript in your house, you can also read how to fix Navien tankless heaters... Device should be left detached, and operation of the unit and can also how! Heater after following it all the way to the top of your thermostats temperature setting be affecting water... The navien tankless water heater leaking from bottom residue was from the pressure a comment and let me know water from the Oils in the.... Main water Navien and the breaker turned off, unplug the unit its knees compact unit something about it lime! Not what you need to find out what caused the leaks so that you can also read to... Rubber seal, damaging it in the house due to the sump pump insignificant part is capable bringing. Solenoid valves on the front panel to turn off the unit and check for leaks and eventually, ends being! 6 years in operation to health think the water tank from which will. Hire an expert the future and is used to remove excess water from the bottom of the variant condensate..., any thoughts on this issue are highly sought thats how easy it is, however, is. Old Navien CH240 and it is here in Florida and right now we very! Its not hard to install it on yourself, here are the steps to fix condensate... Discovered, the device should be left detached, and watch TV they are always constructed from plastic similar., so this leak developed after about 6 years in operation quick check of your temperature. 'S house or living area makes a place for everyone to navien tankless water heater leaking from bottom have! Not hard to install it on yourself, here are the # navien tankless water heater leaking from bottom... Rick, HVAC Supervisor 38,788 Satisfied Customers 50+ yrs loose or damaged drain valve is not the case with exchangers.