Fault 19 troubleshooting answers

1 question with answers cited from the manufacturer manuals.

0
Honeywell 7800 Fault 28: Pilot Flame Failure
Fault 28 indicates a pilot flame failure on a Honeywell 7800 Series relay module. This occurs during the PILOT IGN (PFEP) stage, 4 or 10 seconds after the pilot valve opens, and prevents the main valves from opening. The…
Boilers & burners Honeywell 7800 Series 28 Fault 28 InduQT, from 4 sources