Owner's Manual
Page 14
... of removing the old batteries, the thermosat retains the current time and day. Open the battery door from shutting down due to lack of the thermostat. If you do not see the "bAt Lo" message, replace the batteries once a year to prevent leakage and/or the heating/cooling system ... seconds. Back Lighting (Select Models) Any key pressed lights the display for one to two months before the batteries run low, your thermostat shows a "bAt Lo" message in the digital display. The batteries are located on the right side of battey power. 14 69-1431-1 As the batteries run out completely.
... of removing the old batteries, the thermosat retains the current time and day. Open the battery door from shutting down due to lack of the thermostat. If you do not see the "bAt Lo" message, replace the batteries once a year to prevent leakage and/or the heating/cooling system ... seconds. Back Lighting (Select Models) Any key pressed lights the display for one to two months before the batteries run low, your thermostat shows a "bAt Lo" message in the digital display. The batteries are located on the right side of battey power. 14 69-1431-1 As the batteries run out completely.