Honeywell 19 troubleshooting answers
1 question with answers cited from the manufacturer manuals.
- 0Honeywell RM7800 Fault 19: Main Flame Ign. after main valve opens, what to check?
Fault 19 on a Honeywell 7800 Series relay module indicates that the flame signal was lost during the Main Flame Establishing Period (MFEP) or within the first 10 seconds of RUN. This typically means the transition from p…