Direct answer
Do not keep clearing alarms. Record the controller, confirm AUTO, verify fuel availability and remove household load before one controlled restart.
What this covers
- Residential automatic standby generators with a controller display or status light
- The exact condition described in the title
- Customer-accessible checks before internal repair or reset
What it does not cover
- ×A different brand, model family or similar-looking code
- ×Internal live-electrical, gas, refrigerant or sealed-system testing
- ×A guarantee that a named component has failed without isolation
Capture the exact state
ReversiblePhotograph controller/status light and note fuel, last exercise and cranking.
Separate the likely fault domains
ReversibleCheck AUTO, battery status, external fuel shutoff, LP supply, airflow and maintenance.
Correct only the proven, accessible condition
ReversibleCorrect an obvious external condition, then follow the exact alarm-clear and unloaded restart once.
Verify once before going farther
ReversibleConfirm stable manual operation before restoring loads one at a time.
Evidence ledger
Sources behind this answer
Visible sources support the visible claims. Home Product Support records the publisher, the fact used and the review date; community reports can suggest an issue but do not become a published fact on their own.
Exact questions
Common follow-ups
What should I record first for “Home standby generator will not start during an outage”?+
Photograph controller/status light and note fuel, last exercise and cranking.
Does the symptom or code prove a part has failed?+
No. Check AUTO, battery status, external fuel shutoff, LP supply, airflow and maintenance.
When should I stop troubleshooting?+
Stop for fuel odor, repeated cranking, damaged exhaust/wiring, flooding or unknown alarm.
Answer for the exact device and software version shown above.