Direct answer
The alarm and exact shutdown moment matter. Speed, temperature, oil pressure, fuel and overload protections cannot be diagnosed by repeated loaded restarts.
What this covers
- Residential standby generators that start, run briefly and enter alarm
- 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
ReversibleRecord alarm, duration, load, weather, fuel and whether it fails in exercise or outage.
Separate the likely fault domains
ReversibleWith loads removed, inspect oil after cooldown, exterior airflow, filter and fuel availability.
Correct only the proven, accessible condition
ReversibleCorrect only a proven external condition; leave internal engine and controller work to service.
Verify once before going farther
ReversibleRun one controlled unloaded test and retain the code if it returns.
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 “Standby generator starts and then shuts down”?+
Record alarm, duration, load, weather, fuel and whether it fails in exercise or outage.
Does the symptom or code prove a part has failed?+
No. With loads removed, inspect oil after cooldown, exterior airflow, filter and fuel availability.
When should I stop troubleshooting?+
Stop after a repeat or for heat, smoke, fuel/oil leak, unstable speed or damaged exhaust.
Answer for the exact device and software version shown above.