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Good Pilot-Nat. Port GRH/OV 007D
INSPECTING
BURNER
Check pilot flame pattern and burner flame pattern often.
PILOT FLAME PATTERN
Figure 29 shows a correct pilot flame pattern. Figure 30 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.
Thermocouple
Pilot Burner
Figure 29 - Correct Pilot Flame Pattern
Bad Pilot-Nat. Port GRH/OV 007E
Pilot Burner
Thermocouple
Figure 30 - Incorrect Pilot Flame Pattern
If pilot flame pattern is incorrect, as shown in Figure 30
• turn heater off (see To Turn Off Gas to Appliance, page 25).
• see Troubleshooting, pages 28 through 31.