A.O. Smith Electrical Overload or Short Circuit

A.O. Smith water heater trips the electrical breaker repeatedly.

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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.

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Possible Causes

Shorted heating element, Damaged wiring, Incorrect breaker size, Water intrusion into electrical compartment

How to Fix / Troubleshooting

Safety: Leave the electrical breaker in the OFF position until the fault is identified and corrected. There is a risk of fire or electric shock.

  • 1. Inspect junction box: With electrical power turned off, carefully check for loose wires, burnt insulation, or water intrusion inside the heater's junction box.
  • 2. Test elements: Disconnect the wires from each heating element and test its resistance to ground. Replace any element that shows a short circuit.
  • 3. Check wiring: Inspect the wiring from the electrical panel to the heater for any signs of damage. Repair or replace as needed.
  • 4. Verify breaker size: Ensure that the circuit breaker and wire gauge correctly match the heater's nameplate rating.
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Repair Difficulty

Hard 4/5

Required Part

Heating Elements
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