Ask us anything

How to maintain A. O. Smith promax plus?

Maintaining your A. O. Smith ProMax Plus water heater is essential to ensure its longevity, efficiency, and safety. Regular maintenance can also help you avoid costly repairs and extend the life of your water heater. Here's a comprehensive guide on how to maintain your A. O. Smith ProMax Plus water heater:

1. Read the Manual:
Start by reading the owner's manual that came with your ProMax Plus water heater. The manual provides specific information about your unit's model, warranty, and maintenance requirements. It may also include troubleshooting tips and guidelines for proper care.
2. Check for Leaks:
Regularly inspect the area around your water heater for any signs of leaks or water accumulation. Even a small leak can lead to significant damage over time. If you notice any leaks, address them immediately by tightening connections or contacting a plumber for repairs.
3. Flush the Tank Annually:
Over time, sediment and mineral deposits can build up inside the tank, reducing heating efficiency and potentially causing damage. To prevent this, flush the tank annually or as recommended in your owner's manual. Here's how to do it:
a. Turn off the power supply to the water heater. For electric models, switch off the circuit breaker. For gas models, turn off the gas supply and pilot light.
b. Connect a garden hose to the drain valve located near the bottom of the tank. Ensure the other end of the hose is directed to a suitable drain or outside.
c. Open a hot water tap in your home to allow air into the tank.
d. Open the drain valve and let the water flow out until it runs clear, indicating that sediment has been flushed out. Close the drain valve and remove the hose.
e. Close the hot water tap and refill the tank. Restore power to the water heater.
4. Inspect the Anode Rod:
The anode rod is a sacrificial component that helps prevent corrosion inside the tank. Inspect the anode rod annually and replace it if it shows signs of heavy corrosion or has significantly eroded. Consult your manual for guidance on locating and replacing the anode rod.
5. Check Temperature and Pressure Relief Valve (T&P Valve):
The T&P valve is a safety feature that releases excess pressure and temperature in the tank to prevent explosions. Test it annually by following these steps:
a. Place a bucket under the T&P valve discharge pipe to catch any water.
b. Lift the lever on the T&P valve for a few seconds, allowing water to flow into the bucket. Release the lever, and the flow should stop. If it continues to drip, the valve may need replacement.
6. Inspect Gas Connections (Gas Models):
If you have a gas-powered ProMax Plus water heater, visually inspect the gas connections and burner area for any signs of leaks or corrosion. If you detect any issues, contact a qualified technician to address them.
7. Clean the Burner and Combustion Chamber (Gas Models):
For gas models, it's essential to keep the burner and combustion chamber clean. Follow these steps:
a. Turn off the gas supply and power to the water heater.
b. Remove the burner assembly as per the instructions in your manual.
c. Carefully clean the burner and combustion chamber using a soft brush or compressed air.
d. Reassemble the burner and restore gas and power.
8. Maintain Proper Ventilation (Gas Models):
Ensure that the venting system for gas models is unobstructed and functioning correctly. Any blockages or issues with the venting can lead to safety concerns, so address them promptly.
9. Test the Temperature Setting:
Periodically check the water temperature setting on your ProMax Plus water heater to make sure it's set to the desired level. Adjust it as needed, but be cautious not to set it too high to prevent scalding.
10. Schedule Professional Maintenance:
While you can perform many maintenance tasks yourself, it's advisable to schedule annual professional maintenance for your ProMax Plus water heater. A qualified technician can inspect all components, including the gas or electrical systems, and ensure everything is in optimal working condition.

Regular maintenance of your A. O. Smith ProMax Plus water heater is crucial to keep it operating efficiently and safely. Following these maintenance steps can help you extend the life of your water heater, reduce energy consumption, and avoid unexpected breakdowns. Always prioritize safety, and if you encounter any issues beyond your expertise, seek assistance from a qualified professional.
Connect to virtual expert

Our virtual experts can diagnose your issue and resolve simple problems.