Honeywell T4 Pro Programmable Thermostat Information Sheet

T4 Pro Thermostat Program Schedule
You can program four time periods each day, with different settings for weekdays and weekends. We recommend the pre-sets (shown in the table below), since they can reduce your heating/cooling expenses.

• Wake - Set to the time you wake up and the temperature you want during the morning, until you leave for the day.
• Away - Set to the time you leave home and the temperature you want while you are away (usually an energy-saving level).
• Home - Set to the time you return home and the temperature you want during the evening, until bedtime.
• Sleep - Set to the time you go to bed and the temperature you want overnight (usually an energy-saving level).

System operation settings

1. Press the Mode button to cycle to the next available System mode.
2. Cycle through the modes until the required System mode is displayed and leave it to activate.

NOTE: Available System modes vary by model and system settings.
System modes:
‒ Auto
‒ Heat
‒ Cool
‒ Em Heat
‒ Off

Fan operation settings

1. Press the Fan button to cycle to the next available Fan mode.
2. Cycle through the modes until the required Fan mode is displayed and leave it to activate.

NOTE: Available Fan modes vary with system
settings.
Fan modes:
‒ Auto: Fan runs only when the heating or cooling system is on.
‒ On: Fan is always on.

Honeywell T4 Pro Programmable Thermostat Troubleshooting
If you have difficulty with your thermostat, please try the following suggestions. Most problems can be corrected quickly and easily.

Display is blank

• Check circuit breaker and reset if necessary.
• Make sure power switch at heating and cooling system is on.
• Make sure furnace door is closed securely.

“Wait” appears on the screen

• Compressor protection feature is engaged. Wait 5 minutes for the system to restart safely, without damage to the compressor.

Temperature settings do not change

• If display says “unlock”, thermostat owner has set a lockout setting. If not, verify you are in the correct mode (heat, cool, em heat or auto); see page 1.
• If you are in the correct mode, but you cannot set the heat from 40 °F to 90 °F (4.5 °C to 32 °C), or set the cool from 50 °F to 99 °F (10 °C to 37 °C), you may have range-stops restricting your setting. Check with the installer to see if they set range-stops.