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Lost flame signal 3 times during one heat call.
1. Inspect harness connection flame sensor. Is connection clean and secure?
Yes: -> 2
No: Replace flame sensor or harness
2. Remove flame sensor. Is rod free of contamination?
Yes: -> 3
No: Clean or replace flame sensor.
3. Follow operation instructions to initiate boiler operation. Enter installer menu, boiler status, flame signal. Is flame signal greater then 3.7uA?
Yes: Replace control module
No: Replace flame sensor and burner.
