TH6320WF2003 Honeywell Open Box T6 Pro Smart Programmable Thermostat - Requires 'C' Wire

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OB - TH6320WF2003
List Price: $191.13
Price: $130.00
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Sometimes during transit our boxes get damaged but no harm has been caused to the actual device and these are returned to us. At other times, customers may order by mistake and return the item without having fully unpacked it. These units are considered "Open Box". But do not worry, your device has been tested and unregistered if it's a Wifi device. It has all the original accessories and manuals (there maybe a few cases in which the original manual or information sheet inside the box could have been missing on the returned item and, in those cases, a photocopy or other non-original printed matter with the same information may have been inserted to make up for it). So now these items are safe and ready to use, and the plus side is that you are getting a product similar to a new one at a much lower price. BUT EVEN MORE IMPORTANT: - in case you do buy an Open Box unit and wish to return it or have it replaced because you are unhappy with the product, we have THE SAME 30 day money back guarantee and THE SAME 1 year replacement warranty on all our products (open box and new alike). TRY TO FIND ANOTHER SUPPLIER THAT IS SO CONFIDENT OF ITS OPEN BOX INSPECTION AND TESTING PROGRAM THAT OFFERS THAT KIND OF WARRANTY ON OPEN BOX UNITS!!!


NOTE: This thermostat requires a "C" wire at the location where it is going to be installed.  If you do not have a "C" wire, a potential solution could be to use the THP9045A1023 Wire Saver Module.



  • TH6320WF2003 Up to 3H/2C heat pump and 2H/2C conventional
  • Geofencing, 7-day, 5-2, 5-1-1, 1-week or non-programmable
  • Optional ventilation control for projects that need to meet the ASHRAE 62.2 standard 
  • Optional dual fuel 
  • Uses the UWP mounting system that’s standard across all T Series thermostats
  • Setup and scheduling can be done at the wall on the thermostat, or using the Honeywell Home app
  • Simple homeowner hand-off process enables customers to complete the Wi-Fi connection process on their own
  • Integrates with smart home Apple HomeKit and Amazon Alexa for customers who want to control their smart home devices from a single app
  • Customers can program a schedule or use location-based control with geofence technology, which uses their smartphone location to save energy when they’re away and make the home comfortable when they return
  • Optional wired indoor/outdoor sensors
  • Large touchscreen display
  • 1- year warranty
  • ENERGY STAR® Certified


Product Specifications

24 Vac systems; Gas, Oil, Electric Warm Air; Hot water Coil; Gas, Oil, Electric Hydronic; or Steam / Gravity Systems
Dimensions (in.)
4-1/16 in. long x 4-1/16 in. wide x 1-3/32 in. deep
Dimensions (mm)
103.6 mm long x 103.6 mm wide x 28 mm deep
Thermostat, UWP mounting system, Installation (J-box) adaptor, Small decorative cover plate, screws and anchors, Installation Guide, and User Guide
Item Type
UWP Mounting System
Electrical Ratings
20 to 30 Vac
Up to 3 Heat/2 Cool Heat Pumps; Up to 2 Heat/2 Cool Conventional Systems
Electrical Connections
Honeywell Home UWP Mounting System
Operating Humidity Range (% RH)
5 to 90% RH, non-condensing
Supply Voltage
20 to 30 Vac
Switch Positions (System)
Switch Positions (Fan)
Operating Temperature Range (F)
37 F to 102 F
Operating Temperature Range (C)
2.7 C to 39 C
Shipping and Storage Temperature Range (F)
- 20 F to 120 F
Shipping and Storage Temperature Range (C)
- 28.9 C to 48.9 C
Network Communications
Wi - Fi
LED Back Light
Power Method
Accuracy (F)
1 F
Accuracy (C)
0.5 C
Differential Temperature (F)
± 1 F
Differential Temperature (C)
± 0.5 C
Interstage Differential Temperature (F)
1 to 1.5 F 
Ambient Temperature Range (F)
32 F to 120 F
Ambient Temperature Range (C)
0 C to 50 C
Switch Type
7 day, 5-1-1 day, 5-2 day, 1 day, Geolocation or Non-programmable
Touch Screen
Display Size
6.89 sq. in.
Temperature Control Mode Selections
Ambient Air Temperature
Auto or Manual
Setting Temperature Range (F)
Heat: 40 F to 90 F; Cool 50 F to 99F
Setting Temperature Range (C)
Heat: 4.5 C to 32.0 C; Cool: 10 C to 37.0 C
Heat Current
0.02-1.0 A
Fan Current
0.02-.5 A
External Sensors Available
Optional: Outdoor -- C7089U1006, Remote Indoor — C7189U1005

Get the Manual

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Warranty Information

1 year warranty
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