Honeywell Home TH3110U2008 User Manual

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
Menu
Fan Auto
Heat On
Menu
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.

Honeywell Home TH3110U2008 Specifications

General

Display	Digital
Wi-Fi Capability	No
Stages	1 Heat/1 Cool
Backlight	Yes
Temperature Range	40°F to 90°F
Power Source	Battery
Voltage	24V
Mounting	Wall Mount

Summary

Thermostat Controls Overview

Temperature and Navigation Buttons

Menu Button Functionality

System Mode Settings

How to Change System Mode

Step-by-step guide to select heating, cooling, auto, or off modes.

Fan Mode Settings

How to Change Fan Mode

Steps to select fan operation between Auto and On.

Battery Replacement Guide

Battery Replacement Procedure

Instructions on when and how to replace batteries, with diagrams.

Low Battery Indicator

Alerts and Error Codes

Viewing Thermostat Alerts

Alert Code Definitions

Lists alert numbers, descriptions, and troubleshooting advice.

Troubleshooting Common Issues

Blank Display Solutions

System Response Troubleshooting

Steps to resolve issues with heating/cooling system response.

Compressor Protection Indicator

Important Safety Warnings

Electrical Hazard Precautions

Advises disconnecting power to prevent shock or equipment damage during installation.

Equipment Damage Precautions

Warns against rapid compressor cycling during testing to prevent damage.

Mercury Disposal Notice

Provides instructions for proper disposal of mercury-containing controls.