901176-00 NC
16
ihp.us.com
TROUBLESHOOTING
Continued
OBSERVED PROBLEM
POSSIBLE CAUSE
REMEDY
Electronic Ignition System
Thermostat on, no spark, no pilot gas
1� No main power
2� Faulty transformer
3� Faulty thermostat
4� Faulty limit
5� Faulty ignition control unit
1� Verify wiring and power supply
2� Replace components
3� Replace components
4� Replace components
5� Replace components
Electronic Ignition System
Have spark, no pilot gas flow
1� Main gas supply turned off
2� Manual valve on gas valve turned off
3� Faulty primary valve in the gas valve
4� Faulty wire connection
5� Faulty ignition control unit
1� Turn gas supply on
2� Turn gas supply on
3� Replace components
4� Verify wiring
5� Replace components
Electronic Ignition System
Have pilot gas, no spark
1� Defective ignitor/sensor and/or its
wiring
2� Faulty ignition control unit
1� Replace/Verify wiring
2� Replace components
Electronic Ignition System
Have pilot flame, main burner will not turn on
1� Faulty main valve coil in the gas valve
2� Faulty ignitor/sensor and/or its wiring
3� Ground wire not attached to furnace
chassis
4� Flame rectification signal from pilot
to ignition control unit weak
5� Faulty ignition control unit
1� Replace components
2� Replace components
3� Verify wiring
4� Verify wiring
5� Replace components
Electronic Ignition System
Short-cycling of main burner� Main burner
turns off before the thermostat is satisfied
1� Draft condition pulls pilot flame away
from ignitor/sensor rod
2� Pilot flame gets smaller when main
burner comes on
3� Faulty limit control
1� Verify log placement
2� Verify inlet supply pressure
3� Replace components
Appliance produces a clicking/ticking noise
just after burners are lit or shut off
1� Metal expanding while heating or
contracting while cooling
2� Igniter Assembly is out of position
3� Wind is disturbing the burner flame
and the igniter assembly is relighting
the burner
4� Wire connection loose or wire broken
1� This is normal with most appliances� If noise is
excessive, contact qualified service person
2� Check igniter position and adjust if needed�
3� Should wind disturb the burner flame, the igniter
will automatically spark to relight the burner� This
is normal when the appliance is installed outdoors
in windy conditions
4� Check wiring connections
(see wiring diagram,
Page 13
).
Replace wire harness if necessary
