Trane XT500C Owner's Manual page 62

Troubleshooting Guide (continued).
Symptom
System on indicator
(flame=heat, snowflake=
cool) is lit, but no warm or
cool air is coming from
the registers.
System on indicator
reads Filter and backlight
is flashing.
Outdoor temperature not
displayed or is incorrect.
LED is lit.
Possible Cause
Heating/cooling equipment turns on
the fan when the equipment has
reached the setpoint.
Filter expired.
Filter expired.
Installer did not activate this option.
Outdoor sensor is connected
incorrectly.
System switch is set to Em. Heat.
Compressor failure.
Wait a minute after seeing the flame or snowflake and then
check the registers.
Refer to the Filter Indication section.
Press twice for outdoor temperature when filter
expiration shows on display.
Refer to the Filter Indication section.
Contact installer or service technician.
Move switch to Heat or Auto
Contact service technician.
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Action
Pub. No. 22-5128-02
69-1216