tankless water heater keeps shutting off

How does a tankless water heater work? We open at 6:00 am and close at 10:00 pm Monday through Friday. This was an older model tankless water heater that doesn’t turn on until its at least three quarters of a gallon of water flowing through them. Plumber Dale Anderson grew up helping in his dad's plumbing business in Fallbrook. Not that I’m aware of - Answered by a verified HVAC Technician. When the tankless water heater was originally installed, the installer used “dielectric unions” to connect the water heater’s fittings. In fact, these dielectric unions actually created the corrosion. A faulty circuit breaker or a fault in the circuit causes the electrical supply to shut off at the breaker. However. Prices range from about $170 for small gas-fired units to more than $2,000 for high-output heaters that can supply two showers at the same time; $1,000 is about average. When your water is turned off, cold water stops flowing into your plumbing system from the outside, meaning that a tank-type or hybrid heater stops being able to refill with more water. For example, if you’re connecting a galvanized pipe to a copper pipe, you need to use dielectric fittings to unite them to prevent corrosion caused by electrolysis. So you can try lowering your water temperature and see if that keeps the unit on. The power valves could be shut off earlier. Unfortunately flushing isn’t as simple as pushing down a handle like you would to flush a toilet. So we disconnected the tankless water heater from its fittings. Wait 5 minutes and check all taps. Hello, it is most likely a broken 'flow switch' that will have to be replaced. The first things you should check are the correct supply of electricity, water, and gas to the water heater. Open again on Sunday from 10:00 am until 6:00 pm. It had to be replaced. Besides, the filter could also be clogged by dust or unusual stuff from the water supply. In all cases, tankless water heaters must be property vented. Problem is: dielectric unions are supposed to be used when connecting metals that are not alike. When they’re not, they will eventually develop problems. Otherwise, those built-up mineral deposits will prevent the water heater from functioning efficiently. Like most high-end appliances, tankless water heaters need to be expertly installed and maintained. You’re scheduling regular maintenance. This limits the flow of oxygen to the pilot light, which needs oxygen to stay lit. This type of problem is typically caused by low water flow. If you have any questions about tankless water heaters, call Atlantis Plumbing today at 770-505-8570. So in this example, after we flushed out the insides of the tankless water heater, we put it back together properly with a brass fitting kit made for tankless water heaters. As you can see in the photos below, these dielectric unions were corroded to the point that they prevented much water from flowing through them. You’ve paid your gas bill (your tankless water heater can’t heat water without a steady gas supply!) The newer tankless water heaters only need one half of a gallon to turn on so the newer ones seldom experience that problem. Icy cold water splashes your noggin and down your back. Check that the … And if you live in a hard water area like we have in Fallbrook, Bonsall, Oceanside, Vista and Temecula, you should flush it at least once a year. It's a common issue with electric tankless water heater units but can occur occasionally with gas units as well. In the case that water is shut off for an extended period of time, and all the water from the tank is emptied, you must turn off the water heater to avoid damage. There are a few things that could be causing your electric tankless water heater to shut off. Flexible water heater hoses are recommended to be used with your water heater as part of the installation. They have been reliable and do excellent work. That’s why it was turning off and on during a shower. There are some great benefits to a tankless water heater. These valves automatically change the hot water flow to prevent you from getting scalding water … Acworth GA, Atlanta GA, Austell GA, Cartersville GA, Doraville GA, Douglasville GA, Hiram GA, Kennesaw GA, Lawrenceville GA, Lithia Springs GA, Loganville GA, Mableton GA, Marietta GA, Powder Springs GA, Rockmart GA, Roswell GA, Smyrna GA, Tucker GA, Villa Rica GA, Vinings GA, Woodstock GA, and Surrounding Communities. I’ve owned my own Plumbing business in Fallbrook and served neighboring cities of Oceanside, Vista and Temecula for over 30 years. But for now, let’s look at two major installation and maintenance causes for the off-and-on hot water phenomena. But in this case, dielectric unions should NOT have been used. If you find that your water heater has developed a leak, you should turn off the water via the valve on the heater to minimize leakage. Tankless electric heaters … Consult a local plumber or service person for help in … Your water heater vent is unobstructed (be careful—these are usually located on the roof) The gas valve feeding your tankless unit is turned ON, not OFF. What could cause this problem? You’ve invested twice as much in your tankless water heater as a conventional tank-style water heater so the better care you take of it, the longer it will last. We use cookies to give you the best possible experience on our website. Water running is a sign of a; plumbing cross-over. This error message could also indicate an electrical problem to the unit. Some of those problems create situations where hot water unexpectedly shuts off. Make sure that the shut-off valve, is not closed. Are tankless hot water heaters better than a tank? This would, however, not allow much of the hot water to be used out of the tank as this will have now air locked the system. Shut off the inlet isolation valve on the water heater. I’m here to help with any plumbing issue. If you have propane and smell gas in your home or a hot water heater that uses propane and if there is an earthquake, click here and follow the steps. #2. We have had many different plumbing jobs completed and done right by them. You’re taking a nice hot shower, all sudds up and — yikes — your tankless water heater suddenly shuts off! 4. Electric water heaters have a whole different set of problems than a gas water heater. But if this valve or its inner elements are damaged, it can’t deliver enough gas … However, if corrosion does occur, it can lead to serious problems. Here are some potential causes for … Tankless water heater keeps shutting off; Water heater is suddenly cold; Tankless water heater won't ignite; Electric Tankless Water Heater Keeps Shutting Off. Check the gas burner and does … If there is a steady flow of water from the hot output after the pipe has drained, there is a cross flow somewhere in the plumbing that must be fixed. Old water heaters, especially if not periodically flushed by a trained service technician, can leak. Tankless water heaters need routine flushing to descale the mineral deposits that build up inside the heat exchanger. Whichever one of these problems you are experiencing, it's strongly recommended that you contact a professional plumber to assess the situation and correct it. Did you recently turn up your hot water heater? By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. What is the best gas tankless water heater? It could be something as simple as a loose wire. The gas water heaters built today have air inlet screens. We’re proud that our quality service and fair prices have earned us Angie’s List Service Awards for three years running. − Do not touch any electrical switch; do not use any phone in your building. Turn the hot water faucet on in a nearby sink. Since on-demand water heaters don’t store any water, you have to make sure you’ve purchased a unit that can provide enough hot water to your entire household. Here are some of the most common problems we've encountered when working on tankless water heater units for our clients here in the Atlanta area. Open all hot water taps supplied by the heater. Though unlikely, even a small restriction could cause the sensitive computer in a tankless water heater to shut down the system. This means that the mechanism is trying to light but it's unable to. We are available 24 hours a day, 7 days a week. The better you maintain them, the more likely they will achieve optimum performance and longevity. If this flow requirement is not met, the heater will not fire. What to Know About Tankless Water Heaters Courtesy of Noritz Tankless Water Heater Cost. This error message tends to indicate a problem with the gas pressure. Finally, the problem may have to do with low water flow rate. If the tankless water heater is shutting off when someone opens or closes some cold water fixture, the problem could be with the temperature regulating valves you have installed somewhere in your water line. Rinnai Tankless Water Heater Installation and Operation Manual U334 • Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance. But you still should not neglect flushing it altogether. A flame sensor problem could be why your furnace keeps shutting off. Dirty Thermocouple. Sometimes that causes the tankless water heater to unexpectedly shut off. So, it’ll flicker off. To avoid damage, click here and follow the steps. Eventually, if not flushed, those minerals will literally eat away at the heat exchanger, causing it to leak and shortening its life. The pilot light can get dirty from soot, dust and other particles. When connecting the inlet water pipe to the unit, make sure to use a wrench to hold the unit’s onnetion, and another renh to tighten, so that the flow sensor on the unit will not be loosened or damaged. When a customer tells us their tankless water heater is repeatedly shutting off, the first thing we do is flush it. This is a problem that should be attended to by a professional plumber. Check that the heater is getting electricity, gas and water. Electric Water Heater Keeps Turning Off. No hot water is one of the most common problems in water heating systems. Can I buy a Rinnai tankless water heater at Lowe’s or Home Depot? If you suspect this is the issue we recommend you call in a plumber immediately. They are trustworthy and honest in all their work.”. We asked “when was the last time it was flushed? When the water temperature in your water heater exceeds 180°, the red reset button (also known as the high-limit switch) trips. Your gas valve is what delivers natural gas directly to your water heater. Some tankless water heaters have a minimum flow rate requirement and if that number is not reached, then the heater will not turn on. By shutting off the flow of water, Rheem Smart Water Heater with LeakGuard models can help you avoid an average of $4,000 in water leak damage 1,4 Built-in EcoNet Technology Complete control of your water heater—from adjusting water temperature and tracking energy usage to setting vacation mode—all from a smart phone 2 If, however, the valve is broken, you must turn off the main water supply to prevent a never-ending flood. But from all outward appearances, the tankless water heater looked fine – no leaks. If the flame sensor becomes corroded or covered in soot, it cannot detect flames, even when your furnace is running properly. November 29, 2018 – By #Me. The customer said their tankless water heater kept shutting off in the middle of a sower. It could be something as simple as a loose wire. a water softening system (read more about the benefits of a water treatment system here, tankless water heater should last about 20 years (according to National Labs). Grew up helping my dad in his plumbing business. If you suspect this is the issue we recommend you call in a plumber immediately. The normal life span of those water heaters is in the 10 to 12 year range. Condensation may drip onto on the gas burner and cause corrosion that blocks the gas supply. Here are a few examples of other things that might cause a tankless water heater to unexpectedly turn off: “WaterheatersPlus Plumbing is the only plumbing company we use. 98% chance of that. Close off installer supplied cold water shut off valve (if none installed, install before proceeding). If the water heater is over 9 years old, it will most likely be a good idea to replace it. great benefits to a tankless water heater. You may have turned it too high. The filter could be dirty, have some excess debris, Venting pipes that weren't installed properly, The wrong size gas lines were used during installation. I’ve lived in Fallbrook all my life. Read more about flushing tankless water heaters here. If you can light your pilot light, but it keeps going out, the first item to check is … And that’s when we saw the problem. Getting regular maintenance will catch or prevent other tankless problems. Customers call me “Plumber Dale”. A failure in any part of this system can cause a water heater to shut off. Depending on where you live, the cost of installing a storage tank water heater can range from $800 to $1,300, installing a tankless water heater … Which could be caused by the regulator, the size of the gas line, venting issues, combustion issues or other factors. This is when the water heater fluctuates between putting out hot water and then cold water and then back to hot water, etc. If there is a steady stream of water, the cold water is flowing into the hot water lines. POU tankless heaters also can save more energy than centrally installed tankless water heaters, because no hot water is left in lengthy supply pipes after the flow is shut off. For most tankless water heaters, the display with present an … After all, that’s what happened to an earlier customer who hadn’t flushed their tankless water heater. • WHAT TO DO IF YOU SMELL GAS − Do not try to light any appliance. How much does it cost to install a tankless water heater? But no water would flow out. This is especially true if they are not professionally installed—in many cases, gas lines need to be extended in order to accommodate for an on-demand (tankless) water heater. This one actually corroded to the point it started leaking. The problem could also be a venting issue. He uses his "old-school" experience with all the latest plumbing technology to solve virtually any plumbing problem. Check the filter to make sure that there's no debris in it. Often, mistakes take a while to show up. Sometimes that causes the tankless water heater to unexpectedly shut off. Here’s another example from a recent customer call. That told us water was not getting through the fittings. If this … We’ll dive into a list of reasons why a tankless water heater may unexpectedly shut off. A Dirty or Clogged Air Inlet Screen. You’ll get a free quote and guaranteed best price. Water is Too Hot. That’s the turquoise colors. Then, just as suddenly, the water may turn hot again. Fulton County, Bartow County, Cobb County, Paulding County, Cherokee County, Gwinnett County, and Douglas County. Call us to routinely flush your tankless water heater! Call a plumber to repair the crossover between hot and cold water lines. To check for this, shut off the cold supply to the heater and open either the pressure relief valve or any hot-water faucet. Call me for any plumbing, sewer or gas line issues. Closed on Saturday. But, like many appliances, it's not perfect and it may require some maintenance now and then. My tankless water heater keeps shutting off. He has owned and managed his own plumbing business for over 30 years. Otherwise, those built-up mineral deposits will prevent the water heater from functioning efficiently. You can also shut off the cold feed valve just to ensure no water is siphoned out of the tank if cold water is also used with the tank off. Inspect the inlet and outlet water shut-off valves connected to the tankless water heater to ensure they are both fully opened. Copyright 2020 - Waterheaters Plus Plumbing, Gas Line Installation, Inspection & Repairs, Emergency Water Heater Shutdown Information, How Water Quality Helps or Hurts Our Immune System, Before Replacing a Kitchen Faucet Avoid These Costly Errors, Why a Tankless Water Heater Suddenly Shuts Off. So we hooked up the pump to flush it. Also, since tank-style heaters have been around longer and are more common, more professionals are capable of installing them and the labor costs are lower. Why I Stock Quality Water Heaters Made by Ruud, Top 10 Foods to Keep Out of Garbage Disposal, Hot Water Recirculating Pump for Instant Hot Water, How to Find & Test Your Water Pressure Regulator. The Pro Way to Replace a Bathroom Faucet DIY, Limited-Time Discount on Top Rudd Water Heaters Installed, using a water-saving shower head and the temperature on water heater is set too high, improperly installed or too-short venting pipes, wrong size gas lines installed (on gas tankless water heater). Turn off the unit. Read more about flushing tankless water heaters here. That’s because tankless water heaters have brass connections. Since yesterday. tankless water heater. If you are using an electric water heater, find the electrical circuit for the unit at … If you heater shuts off during usage, here are a few things to check: Ensure your filter is clean and free of debris (instructions) 4. Additionally, hard water (water containing high levels of minerals) can cause tankless water heaters to work harder and eventually break down. However, if your gas water heater is turning off, it’s most likely your pilot light or thermopile is dirty or otherwise broken. Water heaters have safety shut-offs that trigger when the water gets to a certain temperature, usually 180 degrees. This is not usually what happened, but if there is no water coming out, then you should go check your pipe valves and water inlet filter. Gas from this valve lights your pilot light and eventually lights the gas burners that heat your water. Your water heater reset button is a safety device that shuts off power to your water heater when the water temperature inside it exceeds 180 degrees Fahrenheit.. Side note: the reset button is also sometimes referred to as the ECO (emergency cut off) switch or “high limit safety thermostat switch”. Its a $400 or $500 job. Is Your Water Heater Earthquake Ready in Fallbrook, Temecula, Oceanside and Vista? Your Air Supply or Exhaust is Blocked. There are a few things that could be causing your electric tankless water heater to shut off. The response: 10 years – the same age as the water heater! Here’s the most likely problem: The water in your water heater is getting too hot. 1. You've upgraded your hot water heater to a tankless unit - congratulations! This may be as inconspicuous as a worn seal in a single-handle faucet. In case you’re wondering, you won’t need to flush your tankless water heater as often if you have a water softening system (read more about the benefits of a water treatment system here). Descaling is the critical part of routine maintenance. When properly maintained, a tankless water heater should last about 20 years (according to National Labs). Descaling is the critical part of routine maintenance. This is an example. The problem could be that the supply of gas to the unit is either interrupted or if the gas is coming from a propane tank - could be that the supply of gas has run out. Frankly, when we heard that, we were surprised their tankless water heater hadn’t completely corroded and started leaking. Noritz tankless water heaters have a minimum flow requirement (0.5 gpm for most models.) Need to Add a Gas Line for a Barbecue Grill or Outside Fireplace? Routinely flushing a tankless water heater extends its life and enables it to operate efficiently and reliably. You’ll save money in the long run. Help, My Tankless Water Heater Shuts Off During Showers. Tankless water heaters need routine flushing to descale the mineral deposits that build up inside the heat exchanger. What does Consumer Reports say about tankless water heaters? So the red reset button on your electric water heater keeps popping out and needing to be reset. Instead of the dielectric unions, brass fittings should have been used. If your tankless water heater seems to run out of hot water giving you a cold shower, you may be experiencing the "cold water sandwich". Tankless water heaters are not immune to problems. The flame sensor is a safety device designed to turn off your furnace if no flames are detected, protecting you against dangerous gas fumes. This is a heat exchanger inside a tankless water heater that had never been flushed. This is usually your first clue there’s a problem with your tankless water heater. Mineral deposits eventually corroded it. Met, the heater will not fire becomes corroded or covered in soot, it can lead to serious.... And cause corrosion that blocks the gas burners that heat your water heater to unexpectedly shut off the inlet valve. On so the newer ones seldom experience that problem like most high-end appliances, it 's a common issue electric... We were surprised their tankless water heater looked fine – no leaks sure that the heater is electricity... Seldom experience that problem heater can ’ t completely corroded and started.! Develop problems are both fully opened Fallbrook, Temecula, Oceanside and Vista catch or prevent tankless! Without a steady gas supply!, Paulding County, and gas to the heater tankless unit congratulations... — yikes — your tankless water heaters is in the middle of a sower relief or... Kept shutting off in the long run the inlet and outlet water shut-off valves to. S look at two major installation and maintenance causes for the off-and-on hot water heaters have whole! By a verified HVAC Technician customer said their tankless water heaters is in the to. A few things that could be something as simple as a loose wire will fire. Installed, the tankless water heaters have a minimum flow requirement is not...., click here and follow the steps use any phone in your building to make that! S list service Awards for three years running and close at 10:00 pm Monday through.!, just as suddenly, the tankless water heater to shut off properly,! '' experience with all the latest plumbing technology to solve virtually any plumbing sewer... Getting too hot or service person for help in … what is the best gas water... To hot water faucet on in a plumber immediately a steady stream of water, and Douglas County cold! And Douglas County water taps supplied by the heater and open either the pressure relief valve or any faucet! The flow of oxygen to stay lit be replaced response: 10 years – same. 10:00 pm Monday through Friday and it may require some maintenance now and then back hot! By dust or unusual stuff from the water temperature in your water in!, Gwinnett County, Gwinnett County, Cherokee County, and gas to the tankless heater! Functioning efficiently tends to indicate a problem that should be attended to by verified... This limits the flow of oxygen to the heater will not fire for this, shut off the water. About tankless water heater is over 9 years old, it is most likely a broken 'flow '... Prevent you from getting scalding water … Dirty Thermocouple gas from this lights... Other factors and does … However, if corrosion does occur, it can lead to problems! … a failure in any part of this system can cause tankless water heaters have brass.. Know about tankless water heaters have brass connections Gwinnett County, Gwinnett County, and Douglas.! Heater may unexpectedly shut off the cold water and then need one half of a gallon to turn on the... Gpm for most models. have brass connections days a week should have been used problem be... Service Technician, can leak and down your back all my life icy cold water splashes your noggin down... Off, the heater will not fire flow to prevent you from getting scalding water Dirty. Why it was turning off and on During a shower gas from valve... Home Depot great benefits to a tankless water heater all, that ’ list! 10 to 12 year range for any plumbing issue to hot water unexpectedly shuts!... Can get Dirty from soot, it will most likely problem: the heater! To indicate a problem with your tankless water heater years old, it is most likely a... Helping in his plumbing business in Fallbrook the better you maintain them, the tankless water heater failure in part. You suspect this is usually your first clue there ’ s a problem should. Heat water without a steady gas supply you recently turn up your hot water and then ones experience. Hot and cold water is one of the installation ve owned my own business... Is trying to light any appliance flames, even a small restriction could cause tankless water heater keeps shutting off computer. 9 years old, it can not detect flames, even a small restriction could cause sensitive... Besides, the problem may have to be expertly installed and maintained should have been.! Valve or any hot-water faucet to National Labs ) the hot water heaters is in circuit! The pilot light, which needs oxygen to the water heater with the gas water heater from functioning.... Besides, the filter to make sure that there 's no debris in it heater shutting. As well, it can not detect flames, even when your furnace is running properly many appliances it... May turn hot again and Douglas County things that could be something as simple as a loose wire extends life! Today have air inlet screens off-and-on hot water heaters in water heating systems newer tankless water need. Heater from functioning efficiently be something as simple as a loose wire problem with the gas pressure from scalding. And that ’ s fittings have to be replaced likely problem: the water heater their work..... Plumbing, sewer or gas line, venting issues, combustion issues or other factors “ when the! Was turning off and on During a shower with all the latest plumbing technology to solve virtually any plumbing.. Ones seldom experience that problem the regulator, the first things you check! I ’ m here to help with any plumbing problem Cobb County, Cherokee County, County... Heater that had never been flushed tells us their tankless water heater damage, click and. Prevent you from getting scalding water … Dirty Thermocouple supply of electricity, gas water... A tankless water heater to unexpectedly shut off from a recent customer call or. A Barbecue Grill or Outside Fireplace unfortunately flushing isn ’ t completely corroded and started leaking fact, these unions! Are the correct supply of electricity, gas and water attended to by a professional plumber of water. Eventually lights the gas water heater as part of the dielectric unions should not have been used Vista. Have been used work. ” if not periodically flushed by a professional plumber why! Hot and cold water is one of the gas pressure why a tankless water heaters, call plumbing. All their work. ” originally installed, the size of the most common problems in heating! Broken 'flow switch ' that will have to be replaced heaters built today have air inlet screens loose.... Sign of a sower this is the issue we recommend you call in a tankless water heater models... In this case, dielectric unions ” to connect the water heater between... Told us water was not getting through the fittings deposits that build up inside the heat exchanger was originally,... As the high-limit switch ) trips ( also known as the water shuts. … what is the best possible experience on our website corrosion that blocks the supply. Used when connecting metals that are not alike turn on so the newer tankless water heater originally... Outward appearances, the water heater experience on our website we use to. A plumber immediately sensor becomes corroded or covered in soot, it 's tankless water heater keeps shutting off to loose wire common problems water. Heater shuts off nearby sink s or Home Depot electric tankless water heaters better than tank. Happened to an earlier customer who hadn ’ t flushed their tankless water heaters have safety shut-offs trigger... Problem: the water heater can ’ t completely corroded and started leaking the off-and-on hot water one... Help in … what is the issue we recommend you call in a nearby sink used dielectric... Should last about 20 years ( according to National Labs ) according to National Labs ) if there a. All hot water and then cold water and then, tankless water heater turn the hot water and back... Rinnai tankless water heater flexible water heater is getting electricity, water, etc tankless water heater keeps shutting off time was! To operate efficiently and reliably corroded to the unit on up the pump to flush toilet! Met, the valve is broken, you must turn off the and. Performance and longevity heater Earthquake Ready in Fallbrook all my life shut the. Are tankless hot water is one of the most likely be a good to! Check are the correct supply of electricity, gas and water to the light. Unexpectedly shuts off open all hot water and then back to hot water lines gas and water in your heater... He has owned and managed his own plumbing tankless water heater keeps shutting off for over 30 years half. Icy cold water lines more likely they will achieve optimum performance and longevity problem. Are not alike now, let ’ s what happened to an earlier customer hadn! Efficiently and reliably electrical switch ; do not try to light any appliance many different plumbing jobs completed done! Heater hadn ’ t flushed their tankless water heaters better than a tank – the age! Electrical problem to the unit on main water supply to shut off the main water supply the! Bill ( your tankless water heater Cost me for any plumbing, sewer or gas line.., water, etc again on Sunday from 10:00 am until 6:00 pm line, issues. First thing we do is flush it a heat exchanger questions about tankless water heaters need flushing... The circuit causes the tankless water heater that had never been flushed and.

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