Direct answer
Short cycling can come from thermostat placement, restricted airflow, overheating protection, flame loss or sizing. Record run time and the fault light before cycling power.
What this covers
- Residential forced-air furnaces that stop before satisfying the thermostat
- 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
ReversibleTime burner and blower operation and photograph the indicator after shutdown.
Separate the likely fault domains
ReversibleCompare a clean correctly rated filter, open registers/returns and thermostat demand with the model legend.
Correct only the proven, accessible condition
ReversibleCorrect only blocked airflow or an obvious thermostat setting; recurring safety codes require service.
Verify once before going farther
ReversibleRun two complete cycles without lockout.
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 “Furnace starts and stops every few minutes”?+
Time burner and blower operation and photograph the indicator after shutdown.
Does the symptom or code prove a part has failed?+
No. Compare a clean correctly rated filter, open registers/returns and thermostat demand with the model legend.
When should I stop troubleshooting?+
Stop for gas odor, soot, CO alarm, flame rollout, overheating or repeated high-limit indication.
Answer for the exact device and software version shown above.