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Table of Contents
Related Manuals for Honeywell T8400
Summary of Contents for Honeywell T8400
- Page 1 Honeywell Thermostat 69-1491-1...
- Page 2 Congratulations on the purchase of your new thermostat! Over 1O0 years of Honeywell engineering expertise went into the making of this thermostat in an effort to provide you with a more comfortable and convenient living environment. • Simple and easy to use. The • and • keys make it easy for you to change your temperature setting.
- Page 3 Settings Setting FANand SYSTEM Switches Fan and system settings are controlled by using FAN and SYSTEM switches located on the bottom of the thermostat case. Firstsetthe FANswitch: Auto: Normal setting for most homes. In cooling, the fan goes off and on with the cooling equipment. In heating, the fan may start a few minutes after the heating equipment comes on.
- Page 4 Then set the SYSTEMswitch: Cool: Normal setting for months when your home needs cooling (air conditioning). Digital display shows a snowflake :_4 when cooling is on. Off: Both heating and cooling are off. Heat: Normal setting for months when your home needs heating.
- Page 5 Displaying Temperature Setting NOTE: Your temperature setting can be set anywhere from 40 ° to 99°F (5 ° to 37°C). The temperature setting and the room temperature are shown separately on the digital display. The • indicator points to Set when the temperature setting is displayed and to Room when the room temperature is displayed.
- Page 6 Changing Temperature Setting 1. To lower the temperature setting, press the • key. When in the heating mode, lowering the temperature at night or during the day can lower your energy costs. Room M18442 2. To raise the temperature setting, press the • key. When in the cooling mode, raising the temperature before you leave for work or school also lowers your energy costs.
- Page 7 TroubleshootingGuide CAUTION Operating at too low of an outdoor temperature may cause compressor damage. Damage to compressor possible. Do not operate cooling if outdoor temperature is below 50°F (10°C). Refer to manufacturer's recommendations. Heating or cooling does not come on. •...
- Page 8 Check for air movement at the register. Temperature setting is too warm or cool • Adjust the temperature by pressing either the • or • key. If you have questions concerning this thermostat, call Honeywell Customer Assistance at 1-800-468-1502. Honeywell Automation and Control Solutions...
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What does it mean if there is a star * above the temperature that is registering on the thermostat?