Honeywell 1-Heat/1-Cool Owner's Manual - Page 20

Troubleshooting Tips If . . . Then . . . Display is blank. • Check circuit breaker to be sure it is not tripped. • Check power switch at heating and/or cooling system to be sure it is on. • Check furnace door to be sure it is closed securely. • If you use batteries, check that fresh AAA alkaline batteries are installed as marked on the battery holder. Temperature Check that the temperature settings are: settings do • Heating 40°F to 90°F (4.5°C to 32°C). not change. • Cooling 50°F to 99° F (10°C to 37°C). Heating • system does not turn on. • Set the system to Heat by pressing the System button. Check that the heat temperature setting is set above the room temperature and "Heat On" shows solidly in the display. Check the circuit breaker to be sure it is not tripped. Check power switch at the heating and/ or cooling system to be sure it is on. Check the furnace door to be sure it is closed securely. Wait five minutes for the heating system to respond. If all of this was checked, contact your local heating and cooling contractor. 20 69-1713