5 red flashes
Rollout switch or condensate pressure switch open
This code typically points to
- Actual rollout or combustion event
- Blocked condensate drainage causing safety trip
Next checks to confirm
- Identify which switch is open physically BEFORE troubleshooting
- If rollout: inspect burners/heat exchanger/venting
- If condensate: inspect drain path and trap
Escalation
Rollout is a hard combustion safety problem.
Reset behavior
Hard lockout if rollout; condensate may clear with drain service.
Safety Critical
Immediate concern