Honeywell ENERGYPRO T8665C Owner's Manual page 44

Symptom
Temperature
setting does not
change (Example:
cannot set the
heating higher or
the cooling lower).
69-1538
Table 3. Troubleshooting. (Continued)
Possible Cause
The upper or lower
temperature limits were
reached.
Check that the temperature setpoints are
Heating: 40 to 90° (4.5 to 32 °C).
Cooling: 45 to 99° (7 to 37 °C).
44
Action