TM 9-2540-207-14&P
F7 - EXHAUST OVERHEAT
F7
Exhaust temperature has exceeded a safe operating temperature of 1300F (704°C) and is beyond the
operating limits of the Heater.
CHECK/POSSIBLE CAUSE
REF.
REPAIR
1
Check to ensure Heater ducting
vehicle
Install ducting correctly to Heater. Ensure
is properly installed
TM
ventilation air blows away from Heater to
2.2
ensure proper air mixing.
2.3
2.7
2
Check for obstructions in Air
Remove obstructions
Inlet or Exhaust ducting
Restart Heater
3
Check for bending or crimping
2.3
Replace defective ducting and remove all
of exhaust ducting
unnecessary bends
Restart Heater
4
Check for Carbon accumulation
5.3.7
Clean Burner Housing
inside Burner Housing
5.4.1
Clean Heat Exchanger
5
Check for condition of Flame
5.3.2
If distorted, replace Flame tube and Burner
tube and Burner Chamber
5.3.5
Chamber
Restart Heater
6
Defective Burner Fan Plate
5.5.4
Replace Burner Fan Plate
Restart Heater
7
Defective Electronic
5.2.5
Replace Electronic Programmed Controller
Programmed Controller Board
Restart Heater
6-27
