Honeywell Home T4 Pro User Manual

The screen will wake up by pressing any of the five buttons. If powered by the C wire, the screen stays lit for 45 seconds
after you complete changes. If powered by battery only, the screen stays lit for 8 seconds. Depending on how your
thermostat was installed, the screen light may always be on.
Customer assistance
For assistance with this product, please visit Honeywellhome.com/support
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
‒ Off
‒ Em. Heat (TH4210U only)

Honeywell Home T4 Pro Specifications

General

Model	T4 Pro
Programmable	Yes
Stages	1 Heat/1 Cool
Compatibility	Conventional and Heat Pump systems
Operating Modes	Heat, Cool, Off
Fan Modes	Auto, On
Temperature Range (Heat)	40°F to 90°F
Temperature Range (Cool)	50°F to 99°F
Wi-Fi Capable	No
Display	Digital
Power Source	Battery or Hardwired
Programmability	7-day
Terminal Designations	R, C, W, Y, G, O/B
Power	24VAC
Warranty	5-year limited
Temperature Range	40°F to 99°F