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Trouble Shooting The Gas Control System
WARNING: BEFORE DOING ANY GAS CONTROL SERVICE WORK, REMOVE THE GLASS FRONT.
NOTE: Before troubleshooting the gas control system, be sure external gas shut off is in the “On” position.
Problem
Possible Causes
Corrective Action
Spark igniter will not light.
Defective or misaligned
Check for spark at electrode and pilot: if no spark and electrode
electrode at pilot.
wire is properly connected, replace igniter.
Defective igniter
Using a match, light pilot. If pilot lights, turn off pilot and push
(push-button)
the red button again. If pilot will not light - check gap at elec-
trode and pilot should be 1/8” to 1/4” to have a strong spark.
Pilot will not stay lit after
Defective thermocouple
Check pilot flame. Must impinge on generator and thermo-
carefully following lighting
(flame switch where applicable)
couple. Clean and/or adjust pilot for maximum flame impinge-
instructions.
ment on generator and thermocouple. Replace thermocouple if
pilot will not hold. (Hand tight 1/8 turn on replacement)
Defective valve magnet.
Replace valve, if pilot won’t hold after the thermocouple is
replaced.
Pilot burning, no gas to burner,
Wall switch or wires
Check wall switch and wires for proper connections. Jumper
Valve knob “ON”, Wall
defective
wire across terminals at wall switch. If burner comes on, replace
Switch “ON”
.
defective wall switch. If okay, jumper wires, across wall switch
wires at valve. If burner comes on, wires are faulty or connec-
tions are bad.
Generator may not be generating Check generator with millivolt meter. Take reading at generator
sufficient voltage.
terminals of gas valve. Should read 325 millivolts minimum
while holding valve knob depressed in pilot position and wall
switch “off”. Replace faulty generator if reading is below speci-
fied minimum.
Plugged burner orifice.
Check burner orifice for stoppage and remove.
Defective automatic valve
Remove wall switch wires from gas valve. Install jumper wires
operator.
from top bottom terminals of gas valve. Turn valve on “ON”.
If main burner does not light, replace valve.
Frequent Pilot outage problem.
Pilot flame may be too low or
Clean and/or adjust pilot flame for maximum flame impinge
blowing (high) causing the pilot
ment on generator and thermocouple.
safety to drop out.
Flame lifts off burner and goes
Inner 4” liner has come off flue
Attach 4” liner to flue or termination using screws, silicone and
out in less than 30 seconds
or termination, flame is starving
clamps as stated in manual.
for oxygen
Flame lifts off burner on
Improper installation of
Be sure to position firebrick against firebox walls and be sure to
one side while the rest of
firebrick. Firebrick is likely
use brick clips attached to the inner side of firebox.
the flame remains lit.
leaning.
Trouble Shooting The Gas Control System
