Honeywell T8112C Owner's Manual - Page 15

If... Too warm or too cool. System On indicator is lit, but no heat is coming from the registers. Thermostat current temperature setting does not match the display temperature to within +/- 1°. Incorrect temperature showing on thermostat display. Then... • Press Run Program key to check the current temperature setting. • If desired, change the temperature setting. See Programming Your Thermostat section. • Allow time for the furnace to heat up and the fan to come on before checking for heat at the register. • 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. • During recovery from setback or setup, setting and display temperature can differ for up to 30 minutes after the recovery period. • The thermostat is factory-calibrated and cannot be adjusted. 15 69-0862-4