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General| Brand | Honeywell |
|---|---|
| Model | T8400C1099 |
| Category | Thermostat |
| Language | English |
Configure FAN (Auto/On) and SYSTEM (Cool/Off/Heat) switches for thermostat operation.
Understand how the digital display shows room and set temperatures using indicators.
Adjust the desired temperature using the up and down arrow keys on the thermostat.
Diagnose issues where the heating or cooling system fails to activate, including delay checks.
Troubleshoot and adjust settings when the room temperature is not as expected.
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