Honeywell ENERGYPRO T8665D - Manual (Page 44)

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Temperature
setting does not
change (Example:
cannot set the
heating higher or
the cooling lower).
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).
Table 3. Troubleshooting. (Continued)
Symptom Possible Cause Action