TM 9-2540-207-14&P
C4 - BURNER FAN FAULT
C4
Burner Fan speed is below normal limits
CHECK/POSSIBLE CAUSE
REF.
REPAIR
1
With heater in Purge mode, check
airflow at Exhaust Port, or suction at
Air Inlet. Be careful near the exhaust
system. Exhaust gases are hot.
If air IS circulating through the heater, then
check all electrical connections to the
Burner Fan Restart Heater
If air is NOT circulating through the heater,
check ALL electrical connections from the
Burner Fan Motor to the Burner Fan Driver.
Also check all electrical connections on both
Wiring Harnesses Restart Heater
2
Defective Burner Fan Plate
5.5.4
Replace Burner Fan Plate
Restart Heater
3
Defective Power Wiring Harness
5.5.6
Replace Power Wiring Harness
Restart Heater
4
Defective Electronic
Programmed Controller
5.2.5
Replace Electronic Programmed Controller
Restart Heater
6-8