Forum Discussion
Old-Biscuit
Oct 20, 2015Explorer III
Furnace uses 12V DC power for operation
The 12V DC power can come from good charged battery when not on shore power
The 12V DC power can come from converter when connected to shore power
This is a Fault/Error Code Chart
DIAGNOSTIC CHART
FAULT *************************************** LED INDICATION
Internal Circuit Board Failure ---------- Steady on, no flashing
Limit switch/Airflow problems ----------- 1 flash with 3-second pause
Flame Sense Fault ----------------------- 2 flashes with 3-second pause
Ignition Lockout Fault ------------------ 3 flashes with 3-second pause
The 12V DC power can come from good charged battery when not on shore power
The 12V DC power can come from converter when connected to shore power
This is a Fault/Error Code Chart
DIAGNOSTIC CHART
FAULT *************************************** LED INDICATION
Internal Circuit Board Failure ---------- Steady on, no flashing
Limit switch/Airflow problems ----------- 1 flash with 3-second pause
Flame Sense Fault ----------------------- 2 flashes with 3-second pause
Ignition Lockout Fault ------------------ 3 flashes with 3-second pause
About Technical Issues
Having RV issues? Connect with others who have been in your shoes.24,369 PostsLatest Activity: Mar 11, 2026