Honeywell T8131A Owner's Manual page 35

The furnace or air conditioner
on-time is too short or too long.
The thermostat's current setting
does not match the display
temperature.
bAt Lo remains on display after
fresh batteries are installed.
Contact your heating or air conditioner contractor.
If further assistance is needed, call Honeywell
Customer Assistance at 1-800-468-1502.
Check that the wiring hole in the wall behind the
wallplate was plugged with insulation to prevent
drafts that could adversely affect thermostat
operation.
Be aware that it is normal for the current setting
and display temperature to differ occasionally.
Remove batteries. Wait one hour. Install fresh
alkaline batteries.
35
69-0887—1