Where Is the Reset Button on an AO Smith Water Heater?

The reset button on an AO Smith water heater is typically located on the upper thermostat, behind the access panel, often marked with a red button.

Finding the reset button on your AO Smith water heater is crucial for troubleshooting common issues. The location varies between gas and electric models, but it’s typically found near the thermostat or control panel. This guide provides detailed instructions to locate and use the reset button safely.

Find the reset button on an AO Smith water heater

Reset Button Location on AO Smith Water Heaters

The reset button serves as a safety feature that restarts the unit when it encounters operational issues. Its position depends on whether you have a gas or electric model.

Gas Water Heaters

For gas models, follow these steps:

  1. Locate the lower access panel near the bottom of the unit
  2. Remove the panel using a screwdriver
  3. Look for the thermostat housing
  4. Find the small red or black button labeled “Reset”

The reset button is typically adjacent to the thermostat and gas control valve. It may be part of the thermal switch assembly.

Electric Water Heaters

Electric models have the reset button in a different location:

  1. Turn off power at the circuit breaker
  2. Remove the upper access panel
  3. Pull back insulation to expose the thermostat
  4. Locate the red reset button near the thermostat
Reset button location on AO Smith water heater

When to Use the Reset Button

The reset button activates when the water heater detects potentially dangerous conditions. Common scenarios include:

  • Water temperature exceeding safe limits
  • Pilot light failure in gas models
  • Electrical faults in electric models
  • Thermal switch tripping due to ventilation issues
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Troubleshooting Steps

Before resetting, check these potential issues:

Gas Models

  • Ensure proper gas supply
  • Check pilot light status
  • Inspect ventilation system

Electric Models

  • Verify power supply
  • Check circuit breakers
  • Inspect heating elements

How to Properly Reset Your Water Heater

Follow these steps for a safe reset:

  1. Turn off power/gas supply
  2. Wait 30 seconds
  3. Press the reset button firmly
  4. Restore power/gas
  5. Monitor operation

If the unit continues to trip, consult a professional. Frequent resets indicate underlying problems that require specialized tools and expertise.

Safety Precautions

Always prioritize safety when working with water heaters:

Precaution Reason
Turn off power/gas Prevents electrical shock or gas leaks
Wear protective gear Protects from hot surfaces
Check for leaks Prevents water or gas damage

Common Issues After Resetting

If problems persist after resetting, consider these potential causes:

Gas Models

  • Clogged air filter or flame arrestor
  • Faulty thermocouple
  • Ventilation problems

Electric Models

  • Failed heating element
  • Faulty thermostat
  • Wiring issues

For complex issues, refer to the AO Smith support page or contact a certified technician.

Maintenance Tips to Avoid Frequent Resets

Regular maintenance can prevent many reset-related issues:

  • Flush the tank annually
  • Inspect anode rod every 3 years
  • Check pressure relief valve
  • Clean air intake (gas models)
  • Test thermostats periodically

Proper maintenance extends your water heater’s lifespan and improves efficiency. For more information on maintaining home heating systems, visit our residential HVAC guide.

Joye
Joye

I am a mechanical engineer and love doing research on different home and outdoor heating options. When I am not working, I love spending time with my family and friends. I also enjoy blogging about my findings and helping others to find the best heating options for their needs.