ao-smith GCRT-50 200 Water Heater Error Codes
GCRT-50 200 Error Code Reference
Section titled “GCRT-50 200 Error Code Reference”Natural gas, 50 gal
| Error Code | Fault Description |
|---|---|
| E01 | Pilot out / ignition failure |
| E02 | Temperature sensor (thermistor) open or short circuit |
| E03 | ECO (high-limit) safety switch tripped |
| E06 | Flue gas temperature sensor fault (gas models) |