T3 Pro
Thermostat
Installation Instructions
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
Optional Cover Plate installation
NOTE: If Optional Cover Plate is not required, see "UWP
Mounting System installation" on next page.
Use the Optional Cover Plate when you need to cover
paint gaps from the old thermostat.
1. Before starting, turn the power off at the breaker box
or switch.
2. Mount the Cover Plate to the wall using any of the 6
screw holes. Insert and tighten the mounting screws
supplied with the Cover Plate. Do not overtighten. See
Figure 1. Make sure the Cover Plate is level.
3. Attach the UWP by hanging it on the top hook of the
Cover Plate and then snapping the bottom of the
UWP in place. See Figure 2.
4. If mounting to a wall with no existing wall anchors:
a. Position the Cover Plate on wall. Level and mark
hole positions. See Figure 1.
b. Drill holes at marked positions, and then lightly
tap supplied wall anchors into the wall using a
hammer.
• If your box contains red anchors, drill 7/32" (5.6 mm) holes.
• If your box contains yellow anchors, drill 3/16" (4.8 mm) holes.
• Use 2x supplied screws (#8 1-1/2" (38 mm) for red anchors and
#6 1-1/2" (38 mm) for yellow anchors).
Heat On
Menu
Fan Auto
TH3110U2008,
TH3210U2004
Read before installing
1
2
Need help?
Do you have a question about the T3 Pro and is the answer not in the manual?
Questions and answers
How do I get the bottom number to go down on the thermostat to go lower than 84
To lower the temperature setting below 84°F on the Honeywell Home T3 Pro thermostat, ensure that the Minimum Cool Setpoint (430) is configured appropriately. By default, the thermostat's minimum cool temperature is set to 50°F (10°C). If the thermostat is not allowing settings below 84°F, verify and adjust the system setup as follows:
1. Press the Menu button to access the thermostat settings.
2. Navigate to System Setup using the navigation buttons.
3. Look for the parameter 430 (Minimum Cool Setpoint) and ensure it is set to the desired lower value (e.g., 50°F).
4. Press Done to save changes and exit.
If the thermostat still does not allow lower settings, check if there are any system restrictions or additional setup requirements.
This answer is automatically generated