Resetting AO Smith Water Heater (Easy Guide)

By SmartHomeBit Staff •  Updated: 06/06/23 •  10 min read


Water heaters are essential for providing hot water in households. A.O Smith water heaters are reliable and well-made appliances. If they stop working, the reset button is the first point of troubleshooting.

It is essential to only reset the water heater if there is a problem. Reset buttons are typically located under the upper panel. If the reset button does not work, other problems such as a tripped breaker or incorrectly set thermostat may be the cause. In such cases, it’s best to consult the owner’s manual or a professional technician.

Regular maintenance is important to prevent issues with A.O Smith water heaters. Cleaning and inspection of heating elements and thermostats regularly, setting the water heater to the right temperature, and keeping the area around the device free from obstruction are all ways to make sure it works properly.

AO Smith Water Heaters

AO Smith Water Heaters are renowned for their energy efficiency, durability and performance. They are designed to provide hot water for residential and commercial purposes, with a range of sizes, features and warranty options. This brand has been innovating and improving for over 140 years.

Their advanced technology is key; it ensures high efficiency and optimal performance. Features like self-cleaning, electronic ignition and digital temperature control save energy and make them easy to use. Plus, they are made with high-quality materials and parts, ensuring long-lasting performance.

AO Smith also focuses on customer service and support. They offer excellent customer service and technical help. Plus, they have a network of authorized dealers and technicians for installation, maintenance and repair services.

In short, AO Smith Water Heaters are an excellent choice. They have a variety of sizes, features and support services. Advanced technology, quality materials and customer service make them a reputable brand in the water heating industry.

Understanding the Reset Button

Did you know that most AO Smith water heaters come with a reset button that serves a crucial purpose? In this section, we will explore everything you need to know about the reset button of your water heater. We’ll start by discussing the importance of the reset button and then move onto the location and visibility of the button.

Location and Visibility of the Reset Button

AO Smith Water Heaters are an essential part of homes and offices. If there is an issue, one way to fix it is by resetting it using the Reset Button. It’s important to know where the Reset Button is located.

It is usually at the upper thermostat. Here is a step-by-step guide to finding and resetting it:

  1. Take out the upper thermostat cover with a screwdriver.
  2. Look for a red button labelled RESET.
  3. It may come out or you may need to press it, depending on the model.
  4. You should hear a click if you have reset it correctly.
  5. If the button does not reset, check if the breaker was tripped and reset that first.
  6. Once done, replace the thermostat cover with screws.

Safety should be taken into account when doing this. Disconnect all power sources before making any adjustments. Also, take care when dealing with hot parts like thermostats as they can give electrical shocks.

Knowing how to find and use the Reset Button is helpful in avoiding expensive repairs. However, if the problem persists even after resetting, it is best to consult a professional service provider.

Reset your AO Smith Water Heater and give it a fresh start!

Resetting the AO Smith Water Heater

Are you having trouble with your AO Smith water heater? The problem could be as simple as a tripped reset button. In this section, we’ll explore how to reset your AO Smith water heater and get it working again. We’ll cover resetting the thermal switch, which is a common issue that can cause your heater to stop working. Don’t let a small problem like this leave you without hot water – read on to learn how to reset your AO Smith water heater.

Resetting the Thermal Switch

If your AO Smith water heater stops heating water, it may be because of a tripped thermal switch. You can reset it, but remember to take safety precautions. Here are the steps you need to follow:

  1. Turn off the power supply. Flip the circuit breaker or unplug the unit.
  2. Locate and access the thermal switch. It’s usually three inches long with a red button. Check your owner’s manual or online guides. Remove any insulation that may surround it.
  3. Press and hold down the Red Button – press and hold for ten seconds until you hear a click. This resets the thermal switch.
  4. Re-energize your water heater. Turn on the circuit breaker or plug back in your unit.

Remember that you can only reset the thermal switch once. If it trips multiple times, call a professional plumber. Plus, before working on an electric hot water heater, turn off all electrical sources. If cold water stops running out of all tanks, you’ll need further inspection.

Stay safe. Follow these steps to reset your AO Smith water heater.

Safety Precautions

When working with an AO Smith water heater, safety is essential! Ignoring precautions could lead to injuries or damage to the device. So, unplug the device before maintenance or inspection. Keep the water heater away from wetness and flammable materials to avoid fires. If you hear strange noises or smells, turn off the device and get help from a professional. Regular maintenance checks and cleaning will keep your device running well. AO Smith products are known for their safety standards and reliable reviews. They are a brand you can trust for your home’s safety.

Troubleshooting AO Smith Water Heaters

AO Smith water heaters are renowned for their strength and energy-efficiency. But, like any appliance, they may need troubleshooting when issues occur.

A regular problem is the reset button not working, making the heater not function properly.

To combat this issue, you must locate the reset button. Typically, it’s on the control panel, near the bottom of the heater. Press the button firmly and hold it for about 5 seconds to reset the heater and solve the reset button issue.

If the reset button still isn’t working, it could be a sign of a more serious issue. In these cases, you should call a professional plumber or a trained water heater technician to diagnose and fix the problem. Troubleshooting without proper training and tools can be unsafe and cause further damage to the water heater.

Remember that servicing and inspecting your AO Smith water heater regularly will help prevent reset button breakdowns. This maintenance includes flushing the tank to remove sediment build-up and checking the anode rod for corrosion. By taking these preventative steps, you can lengthen the life of your water heater and make sure it’s functioning efficiently.

One customer had a problem with the reset button on their AO Smith water heater. After failed attempts to reset, they called a plumber who found a broken heating element to be the source. The plumber replaced the heating element, restoring the water heater. The customer was happy to have their heater fixed and aware of the importance of timely professional repairs and routine maintenance.


Maintaining an AO Smith water heater is essential. Its reset button plays a key role. If it trips, there may be a problem such as a faulty thermostat or high limit switch. Resetting the button will work temporarily, but it is important to find the root cause. Homeowners can reduce frequent resets with regular maintenance and inspections. Flush the heater once a year and ensure proper ventilation. Keep the area around the heater clear. Contact a professional plumber if unsure about resetting the button or suspect a serious issue. Proper maintenance and care, plus timely professional help, will keep the appliance running efficiently for years.

FAQs about Ao Smith Water Heater Reset Button

Where is the AO Smith water heater reset button located?

The location of the reset button may vary depending on the type of hot water tank. However, it is typically hidden under insulation or Styrofoam and can be found by opening the metal cover close to the middle of the unit with a screwdriver.

How do I reset an AO Smith gas or electric water heater?

To reset the water heater, turn off the electricity and gas line valve, remove the top panel cover on the side of the unit, and press the reset button located inside. Please refer to the instructions that came with your water heater, as well as follow all safety precautions.

What should I do if there is no hot water available?

If there is no hot water available, resetting the hot water tank may be a possible troubleshooting option. Locate the reset button, as described in the previous answer, and follow the steps to reset the water heater.

How do I ensure that I follow all safety instructions when resetting an AO Smith water heater?

To reduce the risk of property damage, serious injury, or death, it is important to read and follow all labels on the water heater and safety instructions in the printed owner’s manual. Additionally, make sure to refer to the previous steps started and ensure that all safety precautions have been followed.

What are the steps to reset the thermal switch on an AO Smith water heater?

The process to reset the thermal switch may vary depending on the type of water heater. Please refer to the instructions that came with your water heater and follow all safety precautions.

How reliable are AO Smith water heaters?

AO Smith water heaters are known for their reliability, affordability, and longevity. Dependability is a factor that leads many homeowners to choose the brand.

SmartHomeBit Staff