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2
Check the burner flames for:
2. Stable, soft and blue
3. Not curling, floating, or lifting off.
WARNING
At least once a year, prior to or during the heating season,
Due to enclosed
Refer to the unit Parts Catalog for a list of functional parts.
TROUBLESHOOTING
unit operation. Refer to Diagnostic Indicator Chart for
an interpretation of the signal and to this section for an
explanation.
If the integrated ignition control in this unit encounters an
diagnostic LED. If diagnostic LED indicates an internal
Abnormal Operation - Heating Codes
An external lockout occurs if the integrated ignition control
for ignition, the gas valve is deenergized, 15 second inter-
purge cycle is completed, and ignition is reattempted. The
locking out.
diagnostic LED indicates an external lockout, perform the
• Check the supply and manifold gas pressures
• Check the gas orices for debris
• Check gas valve for proper operation
• Check secondary limit
heating cycle may also cause the auxiliary limit to open.
The automatic reset secondary limit is located on top of the
• Check rollout limit
protection device is a manual reset limit located on the
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