Lennox G26Q4/5-100 User Manual

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Page 50
G-G77 Ignition Control -1 and -2 Models
START
YES
NO
G776 IGNITION CONTROL TROUBLESHOOTING
Spark is present but pilot will not light

1993 Johnson Controls, Inc. Reprinted with permission.
Are pilot valve
connections correct
and secure?
Securely connect at
terminal 1 and
ground.
Is 24VAC
between terminals 1
and ground?
Replace
Control.
Is inlet
gas pressure per
manufacturer's
specifications?
Correct gas
pressure.
WARNING
Explosion Hazard. Do not use match to
test for gas pressure.
Is gas at pilot
burner?
Make sure pilot line
is not kinked or
obstructed. Check
for clean orifice.
If OK, replace
pilot valve.
Is spark
gap 0.1 inch and
located in pilot
stream?
Correct or replace
pilot burner.
Shield from drafts.
Check for clean orifice.
END
YES
YES
YES
YES
YES
NO
NO
NO
NO
FIGURE 56

Lennox G26Q4/5-100 Specifications

General

Brand	Lennox
Model	G26Q4/5-100
Category	Furnace
Language	English