Heatilator • Caliber CNXT Series • 4047-132 Rev T • 09/08
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15
15
Troubleshooting
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 quali
fi
ed service technician in the diagnosis of a problem
and the corrective action to be taken. This troubleshooting guide can only be used by a quali
fi
ed service technician. Con-
tact your dealer to arrange a service call by a quali
fi
ed service technician.
A. Intelli
fi
re Ignition System
Symptom
Possible Cause
Corrective Action
1. Pilot won’t light. 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.
B. Loose connections or electrical
shorts in the wiring.
Verify no loose connections or electrical shorts in wiring from
module to pilot assembly. 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 right side of pilot hood. The gap should be
approximately .17 inch or 1/8 in. (3 mm).
D. Module.
Turn ON/OFF rocker switch or wall switch to OFF position. Remove
ignitor wire “I” from module. Place a grounded wire about 3/16 in. (5
mm) away from “I” terminal on 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. Inspect pilot assembly for shorted sparker wire or cracked
insulator around electrode. Replace pilot if necessary.
2. Pilot won’t light, there is no
noise or spark.
A. No power or transformer
installed incorrectly.
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 and 2.8 volts AC.
B. A shorted or loose connection
in wiring con
fi
guration or wiring
harness.
Remove and reinstall the wiring harness that plugs into module.
Verify there is a tight
fi
t. Verify pilot assembly wiring to module.
Remove and verify continuity of each wire in wiring harness.
Replace any damaged components.
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. 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.
Inspect pilot assembly for shorted sparker wire or cracked insulator
around electrode.
3. Pilot sparks, but Pilot will
not light.
A. 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 incorrect.
Verify that spark gap from ignitor to pilot hood is .17 in. or 1/8 in (3
mm).
C. Module is not grounded.
Verify module is securely grounded to metal chassis of appliance.
D. Module voltage output / Valve/
Pilot solenoid ohms readings.
Verify battery voltage is at least 2.7 volts. Replace batteries if
voltage is below 2.7.
