G776 Ignition Control Troubleshooting; Spark Is Present But Pilot Will Not Light - Lennox G23Q2-50 Unit Information

G776 IGNITION CONTROL TROUBLESHOOTING

Spark is present but pilot will not light

.
1993 Johnson Controls, Inc. Reprinted with permission.
START
Explosion Hazard. Do not use match to
test for gas pressure.
NO
Correct or replace
pilot burner.
Check for clean orifice.
NO
Are pilot valve
connections correct
and secure?
YES
Is 24VAC
NO
between terminals 1
and ground?
YES
Is inlet
NO
gas pressure per
manufacturer’s
specifications?
YES
WARNING
NO
Is gas at pilot
burner?
YES
Is spark
gap 0.1 inch and
located in pilot
stream?
YES
Shield from drafts.
YES
END
FIGURE 44
3DJH 
Securely connect at
terminal 1 and
ground.
Replace
Control.
Correct gas
pressure.
Make sure pilot line
is not kinked or
obstructed. Check
for clean orifice.
If OK, replace
pilot valve.