TROUBLE-
SHOOTING
(Continued)
D. Voltage present across the two white wires, check wiring and wire connec-
tions to glo bar.
E. If wiring and wire connections okay, replace glo bar. (Glo bar broken).
2. Glo bar glows but burner will not come on.
A. Check for voltage (24 volts A.C.) at valve 40 seconds after glo bar begins to
glow. If voltage present but valve not opening, replace valve.
B. If no voltage at valve, check brown wire at ignition control for continuity and
good connection.
C. If wire and wire connections okay, replace ignition control.
3. Glo bar operating and gas valve opening but burner will not light.
A. Check gas flow through burner. If no gas is coming through burner, check for
obstruction in gas line, main burner orifice, or main burner.
B. If thermostat okay, check for 24 volt A.C. circuit completion across yellow
and orange wires at ignition control. If no voltage, check for circuit comple-
tion through limit switch and microswitch.
C. If voltage is present at ignition control across yellow and orange wires yet
burner continues to go off, replace ignition control.
4. If the ignitor remains on after main burner ignition or the valve chatters, reverse
the 120-volt A.C. connections at the wall receptacle.
A. If polarity is okay yet burner continues to go off, check thermostat to be sure
it is still completing the valve circuit. If not, check for excessive amp draw
in valve circuit.
B. If thermostat okay, check for 24 volt A.C. circuit completion across yellow
and orange wires at ignition control. If no voltage, check for circuit comple-
tion through limit switch and microswitch.
C. Voltage present at ignition control across yellow and orange wires yet bumer
continues to go off, replace ignition control.
5. Burner cycles off and glo bar comes on immediately, check the following:
A. Check flame sensing probe. Be sure probe is positioned in the burner flame
and glowing cherry red. Check wire and wire connections at probe and
ignition control.
B. Ifwire and wire connections okay, check for voltage across brown and orange
wires at ignition control. If no voltage, replace ignition control.
C. If voltage present, check wiring and wire connections at valve.
D. If wire and wire connections okay, replace valve.
COMPLAINT_XCESSIVE NOISE
1. Blower Out of Balance
Replace blower.
2. Motor Hums
Replace motor.
COMPLAINT--MAIN BURNER WILL NOT CYCLE OFF
1. Check thermostat.
2. Gas Valve Stuck Open
Check gas valve. If stuck open, replace. Do not attempt to repair valve!
COMPLAINTDFURNACE WILL NOT OPERATE
Check all wiring to assure proper connection or detect possible shorts. _1_
201842
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