Need help?Do you have a question about the Honeywell T8400 and is the answer not in the manual?
General| Programs | 7-Day Programmable |
|---|---|
| Color | White |
| Switch Positions (Fan) | Auto, On |
| Display | LCD |
| Terminal Designations | Y, W, G, R, C |
| Power Method | 24 VAC or battery |
Explains control switches for FAN and SYSTEM settings on the thermostat case.
Details SYSTEM switch modes: Cool, Off, and Heat, and their display indicators.
Warning against low outdoor temperature operation in cooling mode to protect compressor.
Addresses issues where the heating or cooling system fails to activate, including delays.
Guides on checking fuses, circuit breakers, and air movement at registers.
Explains how to adjust temperature settings when the room feels too warm or too cool.
To Next Page