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120 volt exposure. To avoid personal injury,
use caution while performing this procedure.
Condition:
Main burner will not light,
Ignition module LED is "ON"
Is Pilot lit?
Y
Does module continue to spark
with pilot lit?
N
Disconnect "brown" wire from
"MV" terminal of ignition module.
Is there 22-27 volts AC across
"MV" terminal of Ignition Module & ground?
(see photo 14)
Y
Reconnect brown wire
to ignition module.
Disconnect brown wire lead from
"MV" terminal of gas valve.
Is there 22-27 volts AC across
brown wire lead & ground
(see photo 15)
N
Check wire harness for damage or
loose connections. Repair or replace
as needed.
10
DANGER
N
See "pilot will not light"
(page 8).
See "Pilot lights, no flame signal"
Y
(Page 9).
N
"MV" terminal of Ignition Module & ground.
Check incoming gas pressure to
Y
gas valve. if okay,
replace gas valve.
SERVICE PROCEDURE D24-III
Be Careful When Making Voltage
Measurements or Jumping Terminals
Not to Damage or Deform Connectors or
Connector Pins.
Ground
14
Be sure module LED is "ON",
pilot is lit and module is not sparking
Recheck voltage across
Is voltage present?
Y
Brown wire disconnected
from "MV" terminal of gas
valve
15
Page 10
Main Burner Operation Testing
CAUTION
Disconnect "brown"
wire from "MV"
location of ignition
Check voltage from
"MV" Terminal of
Ignition module
Replace ignition
N
module
module.
& ground.
Ground lug of
gas valve
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