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62
Pub. No. 22-5128-02
69-1216
Troubleshooting Guide (continued).
Symptom Possible Cause Action
System on indicator
(flame=heat, snowflake=
cool) is lit, but no warm or
cool air is coming from
the registers.
Heating/cooling equipment turns on
the fan when the equipment has
reached the setpoint.
Wait a minute after seeing the flame or snowflake and then
check the registers.
System on indicator
reads Filter and backlight
is flashing.
Filter expired. Refer to the Filter Indication section.
Outdoor temperature not
displayed or is incorrect.
Filter expired. Press twice for outdoor temperature when filter
expiration shows on display.
Refer to the Filter Indication section.
Installer did not activate this option.
Outdoor sensor is connected
incorrectly.
Contact installer or service technician.
LED is lit. System switch is set to Em. Heat. Move switch to Heat or Auto
Compressor failure. Contact service technician.