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Trouble Shooting The Gas Control System
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 the
(push-button)
red button again. If pilot will not light - check gap at electrode and
pilot should be 1/8” to 1/4” to have a strong spark.
Pilot will not stay lit after carefully
Defective safety spill switch
Check pilot flame. Must impinge on generator and thermocouple.
following lighting instructions.
Clean and/or adjust pilot for maximum flame impingement on
generator and thermocouple.
Be sure wire connections from spill safety switch are connected
securely to wires on back of valve.
If pilot still doesn’t light, unplug spill switch wires at valve and
then plug thermocouple wires (blue in color) together. If this
works, the spill switch is defective.
Defective thermocouple
Replace thermocouple
Defective valve magnet.
Turn valve knob on “On”, place wall switch on “On”. Millivolt
meter should read greater than 100mV. If the reading is okay and
the burner does not come on, replace the gas valve.
Pilot burning, no gas to burner,
Wall switch or wires
Check wall switch and wires for proper connections. Jumper wire
Valve knob “ON”, Wall
defective.
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
Check generator with millivolt meter. Take reading at generator
generating 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 specified 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 impingement
blowing (high) causing the pilot
on generator and thermocouple.
safety to drop out.
WARNING:
BEFORE DOING ANY GAS CONTROL SERVICE WORK, REMOVE THE GLASS FRONT.
