Honeywell CT3355A1003 Owner's Manual - Page 35
Incorrect room temperature showing
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The furnace cycles too frequently or the system cycle length is too short or too long. The thermostat's current setting does not match the display temperature to within ±1°. Incorrect room temperature showing on thermostat display. bAt Lo remains on display after fresh batteries are installed. s Readjust system on-time according to instructions on pages 18 and 19. s Check that the wiring hole in the wall behind the wallplate was plugged with insulation to prevent drafts that might adversely affect the thermostat operation. s Be aware that it is normal for the current setting and display temperature to differ on occasion. s During recovery from setback or setup, setting and display temperatures may differ for up to 30 minutes after recovery period. s Make sure the hole behind the thermostat is plugged with insulation to help prevent drafts from adversely affecting the thermostat operation. s The thermostat is factory-calibrated, and cannot be adjusted. s Remove the batteries. Wait one hour. Install fresh alkaline batteries. 35 69-1012