Honeywell 51 troubleshooting answers
1 question with answers cited from the manufacturer manuals.
- 0Honeywell RM7800 Fault 51: Flame signal too strong during ignition, what to check?
Fault 51 on a Honeywell RM7800 series relay module indicates an untrustworthy flame signal that is too high to be genuine. This often points to ignition interference, an incompatible amplifier, or a failing detector. Sin…