A.O. Smith
Power Loss or Dual Element Circuit Failure
No hot water from A.O. Smith electric water heater (no digital display)
Advertisements
Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
Advertisements
Possible Causes
Tripped circuit breaker, Tripped high-limit reset (ECO), Failed upper heating element, Loose wiring at junction box
How to Fix / Troubleshooting
Safety: Turn off the breaker and verify power is off before opening any covers.
- 1. Check breaker: Inspect the electrical panel and reset any tripped breaker feeding the water heater. If it trips again immediately, call an electrician.
- 2. Reset ECO: Remove the upper access panel and insulation. Press the red reset button on the high-limit switch until it clicks.
- 3. Verify power at heater: With a multimeter (if qualified), confirm correct voltage at the heater's junction box.
- 4. Inspect wiring: Tighten all wire nuts and connections in the junction box and at the upper thermostat.
- 5. Test upper element: If there is power but no heating, test and replace the upper element if open.
Advertisements
Repair Difficulty
Medium
3/5
Required Part
Upper Heating Element
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements