Honeywell 13 troubleshooting answers
1 question with answers cited from the manufacturer manuals.
- 0Honeywell RM7800 Fault 13: Airflow switch on in standby, what to check?
Fault 13 on a Honeywell RM7800 series relay module indicates that the combustion airflow interlock is detected as closed during STANDBY, when the fan should not be running and the switch should be open. This prevents the…