Honeywell T8400C1099 Owner's Manual

Honeywell T8400C1099 Manual

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  • Honeywell T8400C1099 | Owner's Manual - Page 1
    Set Room FAN Auto On Electronic Thermostat SYSTEM Cool Off Heat OWNER'S GUIDE 1 69-1491-1 69-1491-1
  • Honeywell T8400C1099 | Owner's Manual - Page 2
    Congratulations on the purchase of your new thermostat! Over 100 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
  • Honeywell T8400C1099 | Owner's Manual - Page 3
    Settings Setting FAN and SYSTEM Switches Fan and system settings are controlled by using FAN and SYSTEM switches located on the bottom of the thermostat case. First set the FAN switch: Auto: Normal setting for most homes. In cooling, the fan goes off and on with the cooling equipment. In
  • Honeywell T8400C1099 | Owner's Manual - Page 4
    Then set the SYSTEM switch: Cool: Normal setting for months when your home needs cooling (air conditioning). Digital display shows a snowflake when cooling is on. Off: Both heating and cooling are off. Heat: Normal setting for months when your home needs heating. Digital display shows a flame
  • Honeywell T8400C1099 | Owner's Manual - 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
  • Honeywell T8400C1099 | Owner's Manual - 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. Set Room M18442 2. To raise the temperature setting, press the ▲ key. When in the cooling mode, raising
  • Honeywell T8400C1099 | Owner's Manual - Page 7
    Troubleshooting Guide CAUTION Operating at too low of an outdoor temperature may equipment. For compressor protection on initial startup and during power interruptions, the T8400 and T8401 Electronic Thermostats go into a five-minute delay. During this delay, the cooling icon, a snowflake flashes.
  • Honeywell T8400C1099 | Owner's Manual - Page 8
    by pressing either the ▲ or ▼ key. If you have questions concerning this thermostat, call Honeywell Customer Assistance at 1-800-468-1502. Automation and Control Solutions Honeywell Honeywell Limited- Honeywell Limitée 1985 Douglas Drive North 35 Dynamic Drive Golden Valley, MN 55422
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OWNER’S GUIDE
Electronic
Thermostat
FAN
SYSTEM
Auto On
Cool Off Heat
Set
Room
69-1491-1