24
103092
Good Pilot-Nat. Port
GRH/OV 007D
INSPECTING
BURNER
Check pilot flame pattern and burner flame pattern often.
PILOT FLAME PATTERN
Figure 25 shows a correct pilot flame pattern. Figure 26 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 25 - Correct Pilot Flame Pattern
Bad Pilot-Nat. Port
GRH/OV 007E
Pilot Burner
Thermocouple
Figure 26 - Incorrect Pilot Flame Pattern
If pilot flame pattern is incorrect, as shown in Figure 26
• turn heater off (see To Turn Off Gas to Appliance, page 23).
• see Troubleshooting, pages 26 through 29.