Siemens HB578A0S Oven Error Codes
HB578A0S Oven Error Code Reference
Section titled “HB578A0S Oven Error Code Reference”The Siemens HB578A0S (iQ500 71 L Built-In Electric Oven) uses the following diagnostic error codes:
| Error Code | Fault Description |
|---|---|
| Er1 | Oven temperature sensor fault — PT5000 sensor disconnected or open circuit |
| Er2 | Power connection fault — incorrect or out-of-spec mains wiring detected |
| Er3 | Electronics cooling fault — cooling fan not operating correctly |
| Er4 | Temperature sensor short circuit — PT5000 sensor shorted to ground |
| Er6 | Door lock fault — pyrolytic self-clean door lock not operating |
| Er9 | Power interruption fault — mains power was cut during an active cycle |
| Er15 | Pyrolytic overtemperature — oven cavity temperature exceeded 380°C during self-clean |
Select a code above for detailed causes, step-by-step repair instructions, and FAQs.