ao-smith ESPT-50 200 Electric Water Heater Error Codes
ESPT-50 200 Error Code Reference
Section titled “ESPT-50 200 Error Code Reference”Electric, 50 gal, 4,500 W dual element, 12-year warranty
| Error Code | Fault Description |
|---|---|
| E02 | Temperature sensor (thermistor) open or short circuit |
| E03 | ECO (high-limit) safety switch tripped |
| E04 | Upper heating element failure (electric models) |
| E05 | Lower heating element failure (electric models) |