Heatilator • GBST4336I, GBFL4136I • 2135-900 • 2/08
38
Intellifi re Ignition System - (continued)
Symptom
Possible Cause
Corrective Action
4. Pilot lights but contin-
ues to spark, and main
burner will not ignite.
(If the pilot continues
to spark after the
pilot fl ame has been lit,
fl ame rectifi cation has
not occurred.)
a. A shorted or loose connection in fl ame
sensing rod.
Verify all connections to wiring diagram in manual. Verify
connections underneath pilot assembly are tight. Verify
connections are not grounding out to metal chassis, pilot
burner, pilot enclosure or screen if present, or any other
metal object.
b. Poor fl ame rectifi cation or contaminated
fl ame sensing rod.
With fi xed glass assembly in place, verify that fl ame is en-
gulfi ng fl ame sensing rod on left side of pilot hood. Flame
sensing rod
should glow shortly after ignition. Verify cor-
rect pilot orifi ce is installed and gas inlet is set to pressure
specifi cations.
c. Module is not grounded.
Verify module is securely grounded to metal chassis of
appliance. Verify that wire harness is fi rmly connected to
the module.
d. Damaged pilot assembly or contami-
nated fl ame sensing rod.
Verify that ceramic insulator around the fl ame sensing
rod is not cracked, damaged, or loose. Verify connection
from fl ame sensing rod to white sensor wire. Clean fl ame
sensing rod with emery cloth to remove any contaminants
that may have accumulated on fl ame sensing rod. Verify
continuity with a multimeter with ohms set at lowest range.
Replace pilot if any damage is detected.
e. Faulty module.
Turn ON/OFF rocker switch or wall switch to OFF position.
Remove ignitor wire “I” from module. Place ON/OFF rocker
switch or wall switch in ON position. If there is no spark at
“I” terminal module must be replaced. If there is a spark at
“I” terminal, module is fi ne.