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12
Smoky flame or poorly adjusted air shutter
Faulty Photocell
Temperature over 165
o
F (74
o
C) at photocell
For gas flames (Flame Rod):
Ignition interference (A flame signal current difference with the ignition bo th on and
off greater than 0.5 A indicates the presence of ignition interference)
Insufficient ground (must be at least 4 times the detector area)
Flame lifting off burner head (ground), or not continuously in contact with the flame
rod
Temperature in e xcess of 600
o
F (316
o
C) at the flame electrode insulator causing
short to ground.
