Heat-N-Glo LifeStyle Collection • Dakota 42, Dakota 42H • 4036-905 Rev. F • 11/04
22
Intellifire Ignition System
Symptom
Possible Causes
Corrective Actions
1.
The
ignitor/module
makes noise, but no
spark.
a. Incorrect wiring.
Verify "S" wire (white) for sensor and "I" wire (orange) for ignitor are connected to
correct terminals on module and pilot assembly. Reversed wires at the module may
cause system to make sparking noise, but spark may not be present at pilot hood.
b. Loose connections or
electrical shorts in the wiring.
Verify no loose connections or electrical shorts in wiring from module to pilot
assembly. Rod closest to pilot hood should be ignitor. Verify connections underneath
pilot assembly are tight; also verify connections are not grounding out to metal
chassis, pilot burner, pilot enclosure, mesh screen if present, or any other metal
object.
c. Ignitor gap is too large.
Verify gap of igniter to pilot hood. The gap should be approximately .17" or 1/8 ".
d. 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. Hold ground
wire about 3/16 inch away from "I" terminal on module. If there is no spark at "I"
terminal module must be replaced. If there is a spark at "I" terminal, module is fine.
Inspect pilot assembly for shorted sparker wire or cracked insulator around electrode.
2.
Pilot won't light,
there is no noise or
spark.
a. Transformer installed
correctly.
Verify that transformer is installed and plugged into module. Check voltage of
transformer under load at spade connection on module with ON/OFF switch in ON
position. Acceptable readings of a good transformer are between 3.2 & 2.8 volts AC.
b. A shorted or loose
connection in wiring
configuration or wiring
harness.
Remove and reinstall the wiring harness that plugs into module. Verify there is a tight
fit. Verify pilot assembly wiring to module. Remove and verify continuity of each wire in
wiring harness.
c. Improper wall switch wiring.
Verify that 110 VAC power is "ON" to junction box.
d. Module not grounded.
Verify black ground wire from module wire harness is grounded to metal chassis of
appliance.
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. Hold ground
wire about 3/16 inch away from "I" terminal on module. If there is no spark at "I"
terminal module must be replaced. If there is a spark at "I" terminal, module is fine.
Inspect pilot assembly for shorted sparker wire or cracked insulator around electrode.
3.
Pilot lights but
continues to spark,
and main burner will
not ignite. (If the pilot
continues to spark
after the pilot flame
has been lit, flame
rectification has not
occurred.)
a. A shorted or loose
connection in sensor 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 flame rectification or
contaminated sensor rod.
Verify that flame is engulfing sensor rod. If the pilot assembly does not have a ground
strap, consider installing one to increase flame rectification. Verify correct pilot orifice
is installed and inlet gas specifications. Flame carries rectification current, not the
gas. If flame lifts from pilot hood, the circuit is broken. A wrong orifice or too high an
inlet pressure can cause pilot flame to lift. The sensor rod may be contaminated.
Clean sensor rod with emery cloth.
c. Module is not grounded.
Verify that module is securely grounded to metal chassis of appliance. Verify that wire
harness is firmly connected to module.
d. Damaged pilot assembly
or dirty sensor rod.
Verify that ceramic insulator around the sensor rod is not cracked, damaged, or loose.
Verify connection from sensor rod to white sensor wire. Clean sensor rod with emery
cloth to remove any contaminants that may have accumulated on sensor rod. Verify
continuity with a multimeter with ohms set at lowest range.
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. Hold ground
wire about 3/16 inch away from "I" terminal on module. If there is no spark at "I"
terminal module must be replaced. If there is a spark at "I" terminal, module is fine.
Inspect pilot assembly for shorted sparker wire or cracked insulator around electrode.
4.
Pilot sparks, but
Pilot will not light.
a. Correct gas supply.
Verify that incoming gas line ball valve is "open". Verify that inlet pressure
reading is within acceptable limits, inlet pressure must not exceed 14 in. W.C.
b. Ignitor gap is too large.
Verify that spark gap from ignitor to pilot hood is .17 in. or 1/8 in.
c. Module is not grounded. Verify module is securely grounded to metal chassis of appliance.
Troubleshooting
11
With proper installation, operation, and maintenance your gas appliance will provide years of trouble-free service. If you do
experience a problem, this troubleshooting guide will assist a qualified service person in the diagnosis of a problem and the
corrective action to be taken. This troubleshooting guide can only be used by a qualified service technician.