Hearth-and-home-technologies Heatilator GDST5244I User Manual download pdf (Page 47)

Heatilator • GDST5244I • 4045-127 • Rev W • 11/08 47

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 qualiﬁ 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 qualiﬁ ed service technician. Con-

tact your dealer to arrange a service call by a qualiﬁ ed service technician.

A. Intelliﬁ 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 conﬁ 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.

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Hearth-and-home-technologies Heatilator GDST5244I User Manual Page 47

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