Troubleshooting - Heat & Glo ST-36TRB-IFT Owner's Manual

C. 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 qualified service technician 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. Contact
your dealer to arrange a service call by a qualified service technician.
IntelliFire Touch
Error Codes:
ECM LED Error
Codes
3 Red: 1 Green IFT-RC400 error message: 'Appliance Safely Disabled', pilot sparks for 90 sec, no flame
rectification.
2 Red: 1 Green IFT-RC400 display: 'Error Pilot Flame', pilot valve solenoid not detected.
2 Red: 2 Green Sparking feedback signal error, spark coil failure.
5 Red: 1 Green IFT-RC400 display: 'Error Power Vent' (if installed).
See Troubleshooting matrix for more detail on Lock-out Error Codes, Possible Causes and Corrective Actions.

Troubleshooting:

Symptom
Pilot won't light, module clicks but
no spark 90 sec, 3 Red/1 Green
Lock out.
Pilot won't light, there is no noise
or spark.
Pilot won't light, there is no noise
or spark, 2 Red/1 Green Lockout.
Pilot won't light, there is no noise
or spark, 2 Red/2 Green Lockout.
Heat & Glo • ST-36TRB-IFT, PIER-36TRB-IFT Owner's Manual • 2484-981 Rev. E • 10/20
Possible Cause
Incorrect wiring.
Loose connections or electrical
shorts in wiring.
Ignitor gap is too large.
No AC power, AC/DC adaptor
faulty, backup batteries (if
IFT-
being used) depleted,
ECM slider switch in OFF
position.
Shorted or loose connection
in system wiring or wiring
harness.
Poor or no system ground.
Pilot solenoid not detected.
Spark coil failure.
Description
Corrective Action
Verify 'S' (White) sense wire and 'I' (orange) ignitor wire are
connected to correct terminals on
Verify no loose connections or electrical shorts in wiring from
module to pilot assembly. Verify wire insulation is not dam-
aged. Verify wires are not grounding out to chassis, pilot burn-
er, or any other metal object. Replace any damaged wires.
Verify spark gap is approximately 0.095" (2.41 mm) to 0.135"
(3.43 mm).
IFT-
Verify ECM slider switch is in ON or REM position. Verify
AC power available to junction box. Verify AC/DC adaptor is
plugged into junction box and ECM. Verify AC/DC adaptor out-
put voltage is between 5.7-6.3 Vdc. If battery pack is used,
check battery pack voltage is >4.2 V (if not, replace batteries).
Verify system wiring configuration. Remove and reinstall wir-
ing harness that plugs into module. Check continuity of wires
in valve wiring harness. Replace any damaged components.
Verify black ground wire in valve harness is connected to metal
chassis of fireplace.
Check if valve harness orange wire is connected to pilot so-
lenoid valve. Check pilot solenoid resistance, nominal is 40
ohms. If open or shorted, replace valve. Check valve harness
wire continuity, if open replace 6-pin harness.
Replace ECM.
IFT-
ECM.
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