Two 4,500-watt copper heating elements provide a first hour delivery of 62 gallons. Save money and energy with this energy efficient model that operates at a 0.92 Uniform Energy Factor (UEF) Tall and slim 59-in H x 20.5-in diameter profile is designed for easier installation. Premium heating elements, anode rod and fused ceramic tank shield ...Preferred Phone*. Alternate Phone. Email*. ; If you have questions or concerns about your water heater, filter, softener or tank, help is available. Reach out to A. O. Smith technical assistance today. If the tankless water heater is attached to the breaker box, flip the switch to OFF. This way, you ensure there is no power going to the tankless water heater. You can proceed when the tankless water heater is disconnected from the power source. Step 2: Find and Remove Cover Plate. Older models of tankless water heaters will have cover …Find Water Heater Repair & Service Provider Near You. To schedule a repair, purchase parts or request maintenance, please contact one of our local service providers directly. Enter your zip code to find an authorized service provider near your location in order to provide service for your water heater. May 14, 2023 · The basic lifespan of an AO Smith water heater is between 10 and 12 years. However, this depends on several elements such as the quality of the water, the amount used or how frequently it is used, the temperature setting, and many more. There are even certain. AO Smith water heaters have a lifespan of more than 20 years. A. O. Smith 240V / 14 kW 2-Chamber Tankless Electric Water Heater. compare. Page 1 of 1. Save energy, space and money with the A. O. Smith Signature Series® tankless electric water heaters. With these water …Jul 25, 2023 · To begin, turn off the power to the water heater by locating the circuit breaker or power switch and flipping it to the “Off” position. This ensures a safe environment in which to perform the ... A.O. Smith water heaters have been around since 1939. These water heaters are considered some of the best that homeowners can get their hands on for their outstanding quality and durability. Contents show 1 A.O Smith Water Heater Has Stopped Working 1.1 Gas Odor from Soot Build-Up 1.2 Leaking Water from Loose Connections 1.3 Bad … A.O. Smith Water Heater Troubleshooting Guide Read More » This comprehensive online workshop includes video modules that we recommend watching in order. At the end of this course, there is an online certification test. Upon passing with a 70% on the test, you will be able to download your certificate in PDF form. Condensing Tankless with X3® Technology Certfication. Get certified by watching the ... Common tankless water heater problems. "Hot water is not delivered instantly," and other common tankless water heater problems are listed below: No hot water (often related to the flame failure and no ignition) Water is too hot. Water is not hot enough. Burner does not ignite. The burner is too noisy. Low water pressure.Learn how to troubleshoot any issues that might come up when trying to fix your properties' gas water heaters.For more information on A.O. Smith Water Heater...Troubleshooting Guide. Learn about AO Smith tankless error codes for easy and inexpensive troubleshooting. The repair guide covers indoor, outdoor, condensing, non-condensing, and ultra-low NOx water heaters with on-demand technology. Use the AO Smith code guide to find the main causes and solutions for the problems of the following models: 110 ... Learn how to troubleshoot any issues that might come up when trying to fix your properties' gas water heaters.For more information on A.O. Smith Water Heater...AO Smith Tankless Water Heater. Clicking Noise: Reverse flow, unit was on standby for too long: Install check valve, give the unit some time to heat water: Water Not Hot Enough: Low set temperature, high water flow, tripped circuit breaker, failed heating element or temperature sensorCommon tankless water heater problems. "Hot water is not delivered instantly," and other common tankless water heater problems are listed below: No hot water (often related to the flame failure and no ignition) Water is too hot. Water is not hot enough. Burner does not ignite. The burner is too noisy. Low water pressure. Like every water heater, AO Smith Tankless Water Heater has also a safety feature called ECO or electric cut-off switch. If it senses the water temperature exceeds the safety level or goes above 180-degree F., it will turn the electric supply off.Common tankless water heater problems. "Hot water is not delivered instantly," and other common tankless water heater problems are listed below: No hot water (often related to the flame failure and no ignition) Water is too hot. Water is not hot enough. Burner does not ignite. The burner is too noisy. Low water pressure.This online certification covers Application, Installation, Top Service Items, Conversion, and other important topics for our Commercial Electric offerings. We will cover: Light Duty Commercial Electric Water Heaters. Standard Commercial Electric Water Heaters. and Heavy Duty Commercial Electric Water Heaters. Commercial Electric Certification.A.O. Smith water heaters have been around since 1939. These water heaters are considered some of the best that homeowners can get their hands on for their …Water Heater Product Literature | A. O. Smith Home Resources Product Literature & Videos Find Product Literature & Videos by Family Search for spec sheets, instruction manuals, warranty documents, installation & troubleshooting videos, and more! Looking for a specific product?This page lists all the available installation manuals for the A. O. Smith water heaters: electric, gas-fired, indirect, solar thermal, storage vessels.Our comprehensive A.O. Smith Water Heater Troubleshooting guide will explain common issues, provide tips, and show you how to read your model's error codes. More Info:...ao smith heater. I am replacing a 40 gal natural gas hot water heater that is 10 years old. I wanted to use a AO Smith(###) ###-####tankless unit. I had a power vent on the old unit that exhausted gas … read more3. Faulty Gas Valve. If the gas valves of the Ao Smith water heater are faulty, then it will blink 3 times. You need to replace the gas valves to solve this problem. However, if the age of your Ao Smith water heater is more than 10 years, then replacing the gas valves is possibly not cost-effective since the tank of the water heater could leak ...An expert in both water heating and treatment, A. O. Smith has combined the two technologies to achieve unparalleled protection on our existing 540, 340 and 240 condensing gas tankless models. X3® Scale Prevention Technology prevents scale build-up, meaning virtually zero lifetime descaling maintenance and three times longer product life.Page 31 TB-A028-06 - A. O. SMITH - FVIR INTELLI-VENT TROUBLESHOOTING CHART LED STATUS PROBLEM SOLUTION The self diagnostic test has 1 Turn off power to the water heater. Ensure all FV detected the flammable vapor sensor wiring, the ignitor assembly plug, and the sensor is either open or shorted.A. O. Smith Corporate Headquarters 11270 West Park Place, Suite 170 P. O. Box 245008 Milwaukee, WI 53224A.O. Smith water heaters have been around since 1939. These water heaters are considered some of the best that homeowners can get their hands on for their outstanding quality and durability. Contents show 1 A.O Smith Water Heater Has Stopped Working 1.1 Gas Odor from Soot Build-Up 1.2 Leaking Water from Loose Connections 1.3 Bad … A.O. Smith Water Heater Troubleshooting Guide Read More » Failure events Unable to detect or measure any water flow rate. Ignition sequence does not start (water heater will not initiate any Effects on the water heater operation) Page 34: Bypass Valve CONFIDENTIAL 240 (T-H3J), 340 (T-H3S) and 540 (T-H3) models Service Manial Ver. 1.00 10-11.by Eric Alvarez. The AO Smith Water Heater is not heating due to several reasons. For example, if it’s an electric water heater, it won’t heat if the upper heating element gets burnt out or faulty. Tripper ECO switches or broken thermostats are other culprits that prevent the unit from heating. No Hot Water in the House (water heater repair ...These water temperature fluctuations can be caused by: An improperly sized gas line, as mentioned above. A plumbing system crossover where there shouldn’t be one. Improperly lengthened venting pipes. Damaged flow sensor — something that should be checked during your annual plumbing maintenance appointment. A dirty water filter on the cold ...If your AO Smith water heater is making noise, troubleshooting steps include confirming a sizzling noise due to the dripping of condensation, tightening any loose pipes, flushing the heater a few times, and paying close attention to the sound being produced to tailor troubleshooting methods. Being the largest manufacturer for water heaters in ...On-Demand Water Heater Installation Manual and Owner’s Guide R D R 540 model only ANSI Z21.10.3・CSA 4.3 Models • 240 Indoor • 340 Indoor • 540 Indoor • 240 Outdoor (USA Only) • 340 Outdoor (USA Only) • 540 Outdoor (USA only) Gas Tankless Water HeaterTM Suitable for combination potable water heating and space heating.Tankless Non-Condensing Ultra-Low NOx Outdoor 140,000 BTU Natural Gas/Liquid Propane Water Heater. compare. Model: GT15-540-PI Lowe’s Item #: 1055579.Contact A. O. Smith through our online contact us form. Tech Support and Warranties: (800) 527-1953 Commercial and Tankless Gas Monday through Friday 7am-7pm CST and Saturday 8am-5pm CST 3. Faulty Gas Valve. If the gas valves of the Ao Smith water heater are faulty, then it will blink 3 times. You need to replace the gas valves to solve this problem. However, if the age of your Ao Smith water heater is more than 10 years, then replacing the gas valves is possibly not cost-effective since the tank of the water heater could leak ...We have 2 A.O. Smith T-H3-DV manuals available for free PDF download: Service Manual, Installation Manual And Owner's Manual A.O. Smith T-H3-DV Service Manual (104 pages) On-Demand Water HeaterNov 11, 2021 · A.O Smith water heater troubleshooting lights. If the “heating” and “open” flashing lights are on, ignition or flame failure might occur. Some water heaters ignite gas with an igniter. If the igniter fails, the burner won’t light. Check that the igniter gets voltage before determining if it’s defective. This way, you can find age of AO Smith water heater and how long it has been in use. AO Smith water heaters should last for 6 – 10 years. This is how long the limited warranty lasts, depending on the type of water heater. However, some water heaters last for more than a decade, depending on how well they are maintained.Restore power to your water heater. End-Note. The diagnostic code ‘E55’ on AO Smith water heater means the unit senses a water leak. In this regard, check the water leak suspicion areas I mentioned. Once you locate the leak source, fix it and reset the water heater. I hope it will clear the fault code. Read Also:A local seafood restaurant trouble call on a tankless water heaterRestore power to your water heater. End-Note. The diagnostic code ‘E55’ on AO Smith water heater means the unit senses a water leak. In this regard, check the water leak suspicion areas I mentioned. Once you locate the leak source, fix it and reset the water heater. I hope it will clear the fault code. Read Also:Ao troubleshooting. Water getting cold 1st shower of the. ao smith troubleshooting. ... Paul Hill. 971 satisfied customers. I have ao smith tankless water heater and have a 991 code, i have ao smith tankless water heater and have a 991 code, how can i clear code? ...Takagi tankless heaters have proven themselves to be highly reliable over the years, ... All Takagi non-condensing tankless water heaters must use sealed stainless steel vent pipe approved for use in Category III appliances. All Takagi condensing models may use Schedule 40 PVC, ... Internal Troubleshooting and RepairFollow the below steps to adjust the temperature of your AO Smith Gas Water Heater. Step 1. Set the Gas Valve To Your Desired Temperature Setting. Locate the gas control knob on the gas valve of the unit. Then, set it to your desired temperature setting. If you set the knob to the ‘Hot’ setting, it will set the water temperature ...Water flow. AO Smith gas tankless water heaters are designed to provide hot water in continuous supply only when it is needed - on-demand. These can provide enough hot water for several fixtures simultaneously, where the water flow of 10 GPM, as found on the largest unit ATI-540H, is the maximum available. Up to four units can be connected into ...I have an electric ao Smith water heater. Unless I turn it all the way up it fluctuates between hot and cold. I don't have a manual and the system was here when I moved into my place a year ago. Is there a way to fix …The gas hot water heater troubleshooting guide will assume that the gas unit was correctly sized, professionally installed, per codes and manufacturers' instructions. The problems such as leaking, smelly water, noise, corrosion and other, similar to the problems found in electric units are described in this repair guide.6. Noise Troubleshooting. Minerals from the tank water can form limescale on the heating element. As a result, heated water gets trapped in the scale, forms steam, and makes a hissing sound. To solve this, flush the heater regularly and perform preventive maintenance. Also, clean the heating elements regularly.Apr 9, 2021 · Tankless water heaters are energy-efficient, have low maintenance costs, and are reasonably durable. But just like any appliance, they’re not completely imm... Ogren54 | Homeowner. ProLine® XE Ultra-Low NOx Indoor 199,000 BTU Condensing Natural Gas Tankless Water Heater Model ATI-540H. Endless Hot Water. 199,000 BTU input. 15-Year Warranty. “ WOW! I've had other tankless heaters. This is easily the quietest and fastest in producing hot water.Good morning! My name is ***** ***** hopefully I can help. The e03 code means low water level. Turn off the power to the unit and turn on the water. Open a hot water faucet somewhere in your house and let it run. Take the aerator out first or it will plug up. Once it's done sputtering and the water is flowing good, then turn the power back on.The 208 Volt 14 Kilowatt 2-Chamber Electric Trankless Water Heater can provide continuous hot water when sized appropriately. A. O. Smith's Electric Tankless water heaters only heat water when needed, leading to potential energy and utility bill savings. These models are easy to install and save valuable storage space--they can be wall …April 12, 2023 by William. AO Smith Tankless water heater stuck in standby mode mainly due to exceeding the safety level of water temperature. Or, it is an indication that the heater is crossing the usage hot water demand. Whatever the reason is, you can simply press the power off button to shut the unit. If that is not proving well, resetting ...Troubleshooting Guide 5| Page 3. NORMAL OPERATION Becoming familiar with how a tankless water heater normally operates may help to figure out what is wrong with it. Assuming it is properly installed with appropriate gas, water, and electric connections, the following is how it should operate:Product Description. Enjoy continuous hot water for up to 1 shower when sized appropriately (shower calculations are based on a 2.5 GPM showerhead in the southern zone) Save space - Compact design frees up valuable storage space. Easy installation - wall mount installation uses standard 3/4-in NPT water connections and does not require venting. Search for your specific model to find a replacement, find specs, find literature, or find maintenance and troubleshooting. Looking for a product family? Find product literature by family 0 - 10 Gallons (447) 10 - 20 Gallons (5) 20 - 29 Gallons (18) 30 - 39 Gallons (132) 40 - 49 Gallons (197) 50 - 74 Gallons (215) 75 - 100 Gallons (90)Various things can suddenly go wrong with an A.O Smith water heater. Whether your A.O. Smither water heater smells strange, has a leak, or has stopped working altogether, this guide will provide steps for fixing it—including how to check the pilot light and clear the vents.2. Pilot Light Issues. If your AO Smith water heater is having problems with the pilot light, you can do a few things to troubleshoot the issue. First, ensure that the gas line is properly connected to the water heater and that the connection is tight. If the connection is loose, the pilot light may not stay lit.AO Smith Tankless Water Heater Troubleshooting Error Code 031, Flash One Time Error Code 101, Flash Five Times Error Code 111, Flash Three Times Error Code 121, Flash Three Times Error Code 311, Flash Two Times Error Code 321, Flash Two Times Error Code 331, Flash Two Times Error Code 341, Flash Two Times Error Code 391, Flash Two Times24/7 same-day water heater repair or replace for your business. Sign Up Today! Find and verify the warranty information on your residential or commercial A. O. Smith water heater. Use the product selector to get started. The reset button of AO Smith Water Heater is generally located on the upper thermostat. To access the upper thermostat, you must remove the upper access panel. Just use a flat head screwdriver and unscrew the upper access panel. Then, pull out the insulation and you can see a red button on the thermostat, which is actually the reset …Find Water Heater Repair & Service Provider Near You. To schedule a repair, purchase parts or request maintenance, please contact one of our local service providers directly. Enter your zip code to find an authorized service provider near your location in order to provide service for your water heater. Try our Product Selector Tool to find the right models for your needs-for both heating and treating your home's water. Find a Water Heater Find Water Treatment Solutions. Find an A. O. Smith water heater, filter or softener at your local Lowe’s. Find your local Lowe’s Home Improvement to begin shopping.Often a broken thermostat. A shortened heating element. A thermostat that is not fitted properly to the tank. AO Smith Electric Water Heater Error Code E10-E13 E10, E11, …Troubleshooting Guide 5| Page 3. NORMAL OPERATION Becoming familiar with how a tankless water heater normally operates may help to figure out what is wrong with it. Assuming it is properly installed with appropriate gas, water, and electric connections, the following is how it should operate:Product Support: ProLine® XE Concentric Vent Indoor 190,000 BTU Non-Condensing Natural Gas Tankless Water Heater Model ATI-310C 100. View Model. Product Support. Product Support: ProLine® 40-Gallon Ultra-Low Nox Atmospheric Vent Short Natural Gas Water Heater Model GURL-40 400. View Model.Get information and support for all A. O. Smith models. Our product specs, warranty sheets, installation guides, and user manuals are online.ao smith heater. I am replacing a 40 gal natural gas hot water heater that is 10 years old. I wanted to use a AO Smith(###) ###-####tankless unit. I had a power vent on the old unit that exhausted gas … read moreTroubleshooting Guide 5| Page 3. NORMAL OPERATION Becoming familiar with how a tankless water heater normally operates may help to figure out what is wrong with it. Assuming it is properly installed with appropriate gas, water, and electric connections, the following is how it should operate:... tankless gas water heater from A. O. Smith. This indoor tankless water heater delivers. ... manual provided with the water heater. Published by the A. O. Smith ...A.O. Smith water heaters have been around since 1939. These water heaters are considered some of the best that homeowners can get their hands on for their outstanding quality and durability. Contents show 1 A.O Smith Water Heater Has Stopped Working 1.1 Gas Odor from Soot Build-Up 1.2 Leaking Water from Loose Connections 1.3 Bad … A.O. Smith Water Heater Troubleshooting Guide Read More »Gas water heater using too much gas. Check if there is a gas leak. Mix the soap and water in a spray bottle. Spray it on the gas connections (you can also apply the mixture with the sponge or paintbrush). It is easy to recognize if there is a leak because bubbles will form. Use the pipe wrench to tighten the fittings.ao smith heater. I am replacing a 40 gal natural gas hot water heater that is 10 years old. I wanted to use a AO Smith(###) ###-####tankless unit. I had a power vent on the old unit that exhausted gas … read moreContact Info. 500 Tennessee Waltz Parkway Ashland City, TN 37015 United States of America Phone: 877-552-0010 Fax: 615-792-2163.Ultra-Low NOx indoor model that operates at a 0.93 Uniform Energy Factor (UEF) Compact, indoor wall-mounted design frees up valuable storage space. Professional installation required - call 877-GO-LOWES. Uses 3/4 inch gas line. Easy temperature adjustment and troubleshooting with integrated controls.Solution: Before AO Smith tankless water heater troubleshooting, test the hi-limit switch and confirm it is working fine and the... The flame rod should be free from dirt and grease, and the computer board should not be damaged. You should be able to listen to two thump sounds from the gas valve or ...The solutions to this problem are the following: Inspect the water heater connections and repair the loose joints. Replace or re-seal the gasket. Clean and maintain the unit regularly. 4. Too Hot Water. Several factors are responsible for which the AO Smith Hybrid water heater supply too hot water.Turn your water heater off at the circuit breaker. Remove the cover of the junction box. You can find it at the top of the water heater. Identify the two wires- the power wire and the ground wire. The color of the power wire is black/black or black/red. On the other hand, green or copper wire is the ground wire.by Eric Alvarez. The AO Smith Water Heater is not heating due to several reasons. For example, if it’s an electric water heater, it won’t heat if the upper heating element gets burnt out or faulty. Tripper ECO switches or broken thermostats are other culprits that prevent the unit from heating. No Hot Water in the House (water heater repair ...6 reasons how you can have instant hot water with a tankless water heater. 1. Instant Heating. Tankless Water Heaters are equipped with a high-powered heating element that ensures instant water heating. AO Smith Zip Tankless geyser comes with a 5500 watts heating chamber, which heats water instantly as you turn the shower on.Ao troubleshooting. Water getting cold 1st shower of the. ao smith troubleshooting. ... Paul Hill. 971 satisfied customers. I have ao smith tankless water heater and have a 991 code, i have ao smith tankless water heater and have a 991 code, how can i clear code? ...Step 1. The first step in testing the proper operation of the air pressure switch is to check if the switch contacts are opened or closed. The test should be done when the pressure is not applied, the power is OFF, and when the switch is disconnected. Put the multimeter probes on wiring terminals, and if there is continuity during the test, the ...Reviewed Dec. 29, 2022. Purchased (2) new 40 gallon electric hot water heaters for our home. Within a month the water started smelling like rotten eggs. Called the company and they said to turn up ...Either you own a Rinnai tankless water heater, Navien, AO Smith, Takagi, Bosch, or any other on-demand model, use this article and get the necessary information on how to deal with the problem "ignition failure," which is the main reason why users complain about the flame loss, water heater not working, no hot water and alike.The troubleshooting …Water flow. AO Smith gas tankless water heaters are designed to provide hot water in continuous supply only when it is needed - on-demand. These can provide enough hot water for several fixtures simultaneously, where the water flow of 10 GPM, as found on the largest unit ATI-540H, is the maximum available. Up to four units can be connected into ...There are arguments for investing in a tankless water heater including the fact that it generates hot water only when you need it—and for as long as you need it—saving 27 to 50 percent of fuel costs over tank-type heaters. (A typical gas-fired tank wastes 40 to 50 percent of the fuel it burns.) Tankless water heaters take up much less …Save money and energy with our energy efficient Ultra Low NOx indoor model that operates at a 0.82 Uniform Energy Factor (UEF) Compact, indoor wall-mounted design frees up valuable storage space. Professional installation required - call 877-GO-LOWES. Uses 3/4 inch gas line and is easily convertible from natural gas to propane with supplied kit.This online certification covers Application, Installation, Top Service Items, Conversion, and other important topics for our Commercial Electric offerings. We will cover: Light Duty Commercial Electric Water Heaters. Standard Commercial Electric Water Heaters. and Heavy Duty Commercial Electric Water Heaters. Commercial Electric Certification.
ao smith heater. I am replacing a 40 gal natural gas hot water heater that is 10 years old. I wanted to use a AO Smith(###) ###-####tankless unit. I had a power vent on the old unit that exhausted gas … read more. Wpial playoff brackets
Consumers should go to www.waterheaterrecall.com, input their model and serial number and complete the form to determine if their water heater is subject to this recall.. Consumers with Whirlpool, U.S. Craftmaster or American Water Heater brand water heaters can call toll-free 866-854-2793 from 8 a.m. to 10 p.m. Eastern Time Monday through Friday or 9 a.m. to 6 p.m. Saturday and SundWhat are the common problems of the AO Smith water heater? There are the most common problems with the AO Smith water heater. For example, no hot water, too hot water, no pilot light or power, taking too long to get hot water and high temperature, etc.500 Tennessee Waltz Parkway. Ashland City, TN 37015. United States of America. Phone: 877-552-0010. Need advice from technical support or have a general question for our sales team? Visit Hotwater.com to contact A. O. Smith Water Products by phone or mail.In most circumstances, the heater should be set to its default of 122°F. Hard Water Problems: In areas where the water is very hard with high levels of calcium and magnesium (about 7+ grains per gallon on residential application), Takagi recommends that the water be treated with a water softener or some other de-scaling device. Do not use a ...Jan 3, 2022 · The solutions to this problem are the following: Inspect the water heater connections and repair the loose joints. Replace or re-seal the gasket. Clean and maintain the unit regularly. 4. Too Hot Water. Several factors are responsible for which the AO Smith Hybrid water heater supply too hot water. Do you need a guide to install and use your A. O. Smith tankless electric water heater? Download the PDF manual and learn how to set up, operate and maintain your 2-4 chamber model. Get the best performance and efficiency from …There are arguments for investing in a tankless water heater including the fact that it generates hot water only when you need it—and for as long as you need it—saving 27 to 50 percent of fuel costs over tank-type heaters. (A typical gas-fired tank wastes 40 to 50 percent of the fuel it burns.) Tankless water heaters take up much less …What are the common problems of the AO Smith water heater? There are the most common problems with the AO Smith water heater. For example, no hot water, too hot water, no pilot light or power, taking too long to get hot water and high temperature, etc.Remove the upper access panel using a flat head screwdriver and gently fold away the insulation, which will expose the red reset or ECO button. This is how the reset button looks like: 3. Press the reset button and you will hear a click. If the reset button clicks, understand you reset the water heater successfully. 4.Here's a list of five possible causes of why hot water is getting too hot and what you can do to fix the problem and avoid similar issues in the future. Thermostat setting. The reset button has popped out. Faulty thermostat. Faulty heater element. Faulty temperature & pressure (t&p) relief valve.The solutions to this problem are the following: Inspect the water heater connections and repair the loose joints. Replace or re-seal the gasket. Clean and maintain the unit regularly. 4. Too Hot Water. Several factors are responsible for which the AO Smith Hybrid water heater supply too hot water.This video provides step-by-step repair instructions for replacing the temperature and pressure relief valve on an AO Smith electric water heater. The most c...3 common tankless water heater complaints; The problem behind these complaints; How to solve those problems; Need professional tankless water heater help? Just contact us. 1. “My tankless water heater runs hot, then cold, then hot again.” The problem behind the complaint? First off, this is a common tankless problem called a “cold water ...Locate manuals and documentation to troubleshoot, install or safely control A.O. Smith water heaters for all commercial and residential models. Find the breaker that is labeled “water heater”. Flip it to the “off” position. Head to your hot water tank. Remove the top panel cover on the side of the unit by removing the screws that hold it in place. The reset button will be located right inside the panel. There may be some insulation covering the reset button.If your AO Smith water heater is making noise, troubleshooting steps include confirming a sizzling noise due to the dripping of condensation, tightening any loose pipes, flushing the heater a few times, and paying close attention to the sound being produced to tailor troubleshooting methods. Being the largest manufacturer for water heaters in ...... tankless gas water heater from A. O. Smith. This indoor tankless water heater delivers. ... manual provided with the water heater. Published by the A. O. Smith ....