Green alternating FLASH / Red alternating FLASH
1-hour lockout
This code typically points to
- Repeated ignition failures
- Repeated pressure-switch/safety failures
- Extended combustion-side problem causing retry exhaustion
Next checks to confirm
- Recover the underlying stored fault rather than treating 1-hour lockout as root cause
- Check ignition sequence on next retry
- Inspect pressure switch, gas supply, and igniter
Escalation
Repeated hourly re-lockout means the primary fault remains unresolved.
Reset behavior
Timed 1-hour retry behavior; clears when underlying fault is resolved.
Urgent
Fix now