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Honeywell T6 Pro Programmable Thermostat Instruction Manual

T6 Pro  
Programmable Thermostat  
Installation Instructions  
Package Includes:  
•
•
•
T6 Pro Thermostat  
UWP Mounting System  
Honeywell Standard Installation  
Adapter (J-box adapter)  
Honeywell Decorative Cover Plate –  
Small; size 4-49/64 in x 4-49/64 in x  
11/32 in (121 mm x 121 mm x 9 mm)  
Screws and anchors  
2 AA Batteries  
Installation Instructions and User  
Guide  
•
•
•
•
Optional Cover Plate installation  
NOTE: If Optional Cover Plate is not  
1
required, see “UWP Mounting System  
installation” on next page.  
Use the Optional Cover Plate when:  
•
Mounting the thermostat to an  
electrical junction box  
•
Or when you need to cover paint gap  
from old thermostat.  
3
2
1. Separate the Junction Box Adapter  
from the Cover Plate. See Figure 1.  
2. Mount the Junction Box Adapter to  
the wall or an electrical box using any  
of the eight screw holes. Insert and  
tighten mounting screws supplied with  
Cover Plate Kit. Do not overtighten. See  
Figure 2. Make sure the Adapter Plate  
is level.  
Use 2x  
supplied  
screws #6  
5/8”  
4
3. Attach the UWP by hanging it on the  
top hook of the Junction Box Adapter  
and then snapping the bottom of the  
UWP in place. See Figure 3.  
4. Snap the Cover Plate onto the Junction  
Box Adapter. See Figure 4.  
GeneralDetails
NameHoneywell T6 Pro Programmable Thermostat Instruction Manual
MakeHoneywell
LanguageEnglish
FiletypePDF (Download)
File size1.01 MB
Download PDF
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Honeywell T6 Pro Programmable Thermostat Instruction Manual
Get the free PDF manual for the Honeywell T6 Pro Programmable Thermostat Instruction Manual and access setup steps, usage instructions, and troubleshooting tips. 👉 View online or download now to keep your thermostat running smoothly!

Honeywell T6 Pro Manual: Questions and Answers

Where is the wiring hole on the Honeywell T6 Pro mounting system?

On the UWP door. Pull the door open to access it. Instruction Manual, p. 2

How do I set up the R Slider Tab on the Honeywell T6 Pro?

Set the slider based on how many R wires you have.

  1. If one R wire connects to R, Rc, or RH terminal, set slider to up position (1 wire).
  2. If one wire connects to R and another to Rc, set slider to down position (2 wires). Instruction Manual, p. 3

Run a system test to check heating and cooling stages.

Access the advanced menu and navigate to the System Test.

  1. Press and hold CENTER and buttons for approximately 3 seconds.
  2. Use arrow buttons to go to TEST. Press Select.
  3. Use arrow buttons to change between Heat, Cool, Fan, Em Heat, or Ver. Press Select.
  4. Press the up arrow to turn stages on one at a time, press the down arrow to turn them off.
  5. Press the Home button to exit. Instruction Manual, p. 10

What's the difference between ISU 270 Backup Heat Fan and ISU 271 Emergency Heat Fan on the Honeywell T6?

Both control whether equipment or thermostat manages fan operation, but Backup Heat Fan applies in Heat Pump mode with backup heat, while Emergency Heat Fan applies in Heat Pump mode with emergency heat. Instruction Manual, p. 8

What does the Honeywell T6 Pro setting ISU 425 Adaptive Intelligent Recovery do?

When enabled, heating or cooling equipment turns on earlier so indoor temperature reaches the setpoint by the scheduled time, providing comfort-based temperature recovery. Instruction Manual, p. 9

Can I use the Honeywell T6 with a heat pump system that has two compressors?

Yes. The thermostat supports 2H/2C, 3H/2C and dual fuel configurations with multiple compressor stages. Instruction Manual, p. 5

Can I set the Honeywell T6 Pro to display temperature in Celsius instead of Fahrenheit?

Yes. In Installer Setup, change ISU 125 Temperature Indication Scale from 0 (Fahrenheit) to 1 (Celsius). Instruction Manual, p. 7

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