72
TROUBLESHOOTING
Symptom Possible Cause Action
No LCD d isplay
Thermostat is not being
powered.
Check 24VAC between C and R.
Temperature settings
do not change.
The upper or lower
temperature limits were
reached.
Check temperature set-points.
Check Installer Setup Numbers
0600 or 0610, modify as needed.
The keypad is fully locked.
Check Installer Setup Number
0670 to change keypad locked
options.
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