PILOT FLAME CHARACTERISTICS
1
MAIN BURNER
PILOT 
FLAME
THERMOCOUPLE
The pilot flame is blue and goes toward the main burner and thermocouple horizontally. A slight yellow tip on the flame is normal. The pilot flame must surround and extend approximately 1/4" (6 mm) beyond the thermocouple, and must extend beyond the first row toward the second row of main burner ports.
BURNER
CHANNEL
MAIN BURNER FLAME CHARACTERISTICS
1
On the main burner, the burning gas forms a primary flame and a secondary flame. The primary flame is blue and about 3/16" (5 mm) high. The secondary flame is very pale blue, 3" (76 mm) to 5" (127 mm) high. Dust in the combustion air will produce an orange flame. Do not mistake it for an improper yellow flame.
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