Honeywell Home T3 Pro User Manual

Name: Honeywell Home T3 Pro
Brand: Honeywell Home
Rating: 4 (1 reviews)

24 pages

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Package Includes:

• T3 Pro Thermostat

• UWP™ Mounting System

• Decorative Cover Plate –

Small; Size 4.72” H X 5.9” W

(120 mm H X 150 mm W)

• Screws and Anchors

• 2 AA Batteries

• Thermostat Literature

T3 Pro

Thermostat

User Guide

TH3110U2008,

TH3210U2004

Read before installing

Heat On

Fan Auto

Heat On

Fan Auto

Call Customer Care toll-free at 18004681502.

Customer assistance

Thermostat controls

The screen will wake up by pressing any of the three 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.

Read before installing

• System status

information

Cool On/Heat On/Em

Heat On, Compressor

Protection

• Indoor

temperature

setpoint

Press + or - to change

temperature setting

• Actual indoor

temperature

• Temperature/

Navigation

buttons

Press to increase or

decrease temperature

setpoint and to

navigate menus and

menu options

• Menu

Press to display

options. Change mode

(Heat, Off, Cool) or Fan

settings options.

Other manuals for Honeywell Home T3 Pro

Installation Instructions36 pages

Questions and Answers:

J
Jason BennettJul 28, 2025
What to do if Honeywell Home T3 Pro heating system does not respond?
- M
  Michael PerezJul 29, 2025
  If your Honeywell Home Thermostat isn't responding when you try to heat your home, first press the Menu button, then Mode, and set the system to Heat. Ensure that the set temperature is higher than the current inside temperature. Also, check that the circuit breaker hasn't tripped and reset it if needed. Finally, confirm that the power switch for your heating and cooling system is turned on and that the furnace door is securely closed. Allow 5 minutes for the system to respond.
R
Rachel RoseAug 7, 2025
What to do if Honeywell Home T3 Pro cooling system does not respond?
- M
  Michelle PageAug 7, 2025
  If your Honeywell Home Thermostat isn't responding when you try to cool your home, first press the Menu button, then Mode, and set the system to Cool. Ensure that the set temperature is lower than the current inside temperature. Also, check that the circuit breaker hasn't tripped and reset it if needed. Finally, confirm that the power switch for your heating and cooling system is turned on and that the furnace door is securely closed. Allow 5 minutes for the system to respond.

Honeywell Home T3 Pro Specifications

General

Type	Programmable Thermostat
Wi-Fi Connectivity	Yes
Geofencing	Yes
Warranty	1-year limited warranty
Compatibility	HVAC systems including gas, electric, oil, and heat pumps
Display	Color touchscreen
Battery Backup	Yes
Temperature Range	40°F to 99°F
Schedule	7-day scheduling
Power Source	Hardwired
Stages	Up to 2 heating and 2 cooling stages
Connectivity	Wi-Fi
Remote Control	Yes (via app)
Installation	DIY installation or professional installation