TM 9-2540-207-14&P
E3 - LOW BURNER AIR FLOW
E3
Combustion air flow operating limits are out of allowable range
CHECK/POSSIBLE CAUSE
REF.
REPAIR
1
Check for obstructions in
Remove obstructions
combustion inlet or exhaust
Restart Heater
ducting
2
Check for kinking/blockage of
Replace defective ducting and remove all
ducting to heater
unnecessary bends
Restart Heater
3
If ambient temperature is below
Remove frost from Air Inlet
32°F (0°C), check for frost
Restart Heater
obstructing heater ducting
4
Check for carbon accumulation
5.3.7
Clean Burner Housing
inside Burner
5.4.1
Clean Heat Exchanger
Restart Heater
Check condition of Flame Tube
5.3.2
If either one is distorted, replace Flame
and Burner Chamber
5.3.5
Tube AND Burner Chamber
Restart Heater
5
Defective Burner Fan Plate
5.5.4
Replace Burner Fan Plate
Restart Heater
6
Defective Electronic
5.2.5
Replace Electronic Programmed Controller
Programmed Controller Board
Restart Heater
Note: Obstructions to look for in combustion or exhaust ducting include: frost,
mud, water, foreign objects, soot, rodents, small birds, etc.
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