G776 Ignition Control Troubleshooting - Lennox G26 series User Manual

G−G77 Ignition Control −1 and −2 Models

G776 IGNITION CONTROL TROUBLESHOOTING

Spark is present but pilot will not light
E
1993 Johnson Controls, Inc. Reprinted with permission.
START connections correct
between terminals 1
gas pressure per
Explosion Hazard. Do not use match to
test for gas pressure.
NO
gap 0.1 inch and
Correct or replace
located in pilot
pilot burner.
Shield from drafts.
Check for clean orifice.
NO
Are pilot valve Securely connect at
and secure?
YES
Is 24VAC
NO
and ground?
YES
Is inlet
NO
manufacturer's
specifications?
YES
WARNING
NO
Is gas at pilot
burner?
YES
Is spark
stream?
YES
YES
END
FIGURE 56
Page 51
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.