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19
103574
INSPECTING
BURNER
Check pilot flame pattern and burner flame pattern often.
PILOT FLAME PATTERN
Figure 17 shows a correct pilot flame pattern. Figure 18 shows an incorrect pilot
flame pattern. The incorrect pilot flame is not touching the thermocouple. This will
cause the thermocouple to cool. When the thermocouple cools, the heater will shut
down.
If pilot flame pattern is incorrect, as shown in Figure 18
• turn heater off (see To Turn Off Gas to Appliance, above)
• see Troubleshooting, pages 21 through 24
Thermocouple
GRH/OV 009GOOD PILOT
Thermocouple
Pilot Burner
GRH/OV 008BAD PILOT/LP
Pilot Burner
Figure 17 - Correct Pilot Flame Pattern
Figure 18 - Incorrect Pilot Flame Pattern