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4-99 26 21322M
GC150 SERIES DIRECT VENT GAS APPLIANCE
STANDING PILOT
Problem Cause Corrective Action
1. Spark ignitor will not
light pilot after
repeated pressing of
red button.
2. Pilot will not stay lit.
3. With pilot lit, valve
and ON/OFF switch
in “ON” position,
burner will not light.
4. Appliance turns itself
off after a period of
time, but pilot stays
lit.
5. Appliance turns itself
off after a period of
time, pilot no longer
lit.
6. Glass doors fog up.
7. Blue flames.
8. Glass has film on it.
A. Defective ignitor.
B. Misaligned electrode.
C. No gas to
pilot/plugged orifice.
D. Ignitor wire grounding
out.
E. Loose ignitor wiring.
Replace ignitor.
Spark should be approximately 1/8” to bottom of pilot hood. Adjust gap to give
proper spark. Remove hands from electrode before pressing red button.
Check valve knob position & any shut-off valves. If propane, check for empty
tank. Check pilot orifice; remove any blockage.
Replace pilot assembly.
Check for spark. If electrode connection is correct & no spark, replace ignitor.
C. Defective pilot sensor
thermocouple.
D. Faulty valve.
A. Pilot flame not in con-
stant contact with pilot
sensor.
B. Pilot sensor not tight-
ened/seated in valve
properly.
Replace pilot sensor thermocouple.
Replace valve.
Check log placement. Check pilot flame; adjust flame if necessary.
Check that pilot sensor connector is tight in valve.
A. 110 volts of electricity
has burned out valve.
B. ON/OFF wall switch
defective.
C. Plugged burner orifice.
D. Defective thermopile.
E. Burner not on orifice.
F. Loose or faulty wiring.
G. Faulty valve.
H. Faulty high limit switch/
micro switch.
Remove voltage and replace valve.
Check ON/OFF switch for proper connections. Connect wires across terminal at
ON/OFF switch. If burner comes on, replace ON/OFF switch. If burner doesn’t
come on, connect to ON/OFF switch junctions at valve. If burner comes on,
replace wires.
Check burner orifice, remove blockage.
Replace thermopile.
Check burner; place on orifice.
Check for loose connections; verify wiring (See Figure 20).
Replace valve.
Replace high limit switch or micro switch.
A. Intermittent short in
ON/OFF wiring system.
B. Defective thermopile.
Check/ replace ON/OFF wiring system.
Replace thermopile.
B. Defective pilot sensor
thermocouple.
A. Pilot flame not in constant
contact with pilot sensor.
Replace pilot sensor thermocouple.
Check log placement; check pilot flame, adjust flame if necessary.
A. Normal result of gas
combustion.
No action necessary - glass will clear as appliance warms.
A. Normal result during first
20 minutes of burning.
No action necessary - flames will turn more yellow after about 20 minutes.
A. Normal result during
initial few hours of
operation.
Clean glass with Brasso or silver polish.
B. Improper log place-
ment causing soot.
Check log placement; reposition if necessary.
C. Dark yellow tipped flame.
Open air shutter to increase air to gas ratio.