7
Limit or rollout open longer than 3 minutes, or 10 successive limit trips occurred during high heat
This code typically points to
- Same underlying causes as code 4, but persistent/repetitive
Next checks to confirm
- Work code 4 chain first, then determine why fault persisted or repeated
Escalation
Persistent lockout = airflow/gas input/limit integrity review before release.
Reset behavior
Auto-reset after 3 hours.
Safety Critical
Immediate concern