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T6 Pro Z-Wave Smart Thermostat; 3H/2C Heat Pump, 2H/2C Conventional (TH6320ZW2003)

Honeywell T6 Pro Z-Wave Smart Thermostat; 3H/2C Heat Pump, 2H/2C Conventional (TH6320ZW2003)

The Honeywell T6 Pro Z-Wave Programmable Thermostat is a Z-Wave Plus certified thermostat capable of controlling up to three heat and two cool stages of heat pump, (including dual fuel heat pump systems) and up to two heat and two cool stages of conventional system (3H/2C HP, 2H/2C Conv.) It also measures, displays and reports % indoor relative humidity; however, this model does not control humidification equipment.

  • Offers control of heating and cooling
  • Fan functions are On, Auto, and Circulating
  • Time based 7-day, 5-1-1 or 5-2 day programmable, non-programmable, or occupancy controlled with Z-wave panel/app integration
  • Up to 3H/2C Heat Pump systems or up to 2H/2C Conventional systems
  • Features RH, RC, C, Y2, Y1, G2, G1, B, O, W2, and W1 wires
  • C wire optional; can be battery powered
  • Keypad lockout
  • DST Enabled
  • Power 2 ways: mains power via 24 volts or via batteries


Features the following Program Modes:
7-Day Programmable, 5-1-1 Programmable, 5-2 Programmable, 1 Week, Manual / Not Programmed, Occupancy Through App, 5-1-1 Programmable, 5-2 Programmable, 7-Day Programmable, 1 Week, Manual / Not Programmed, Occupancy Through App

Features the following Stages:
Up to 3 Heat/2 Cool Heat Pump Systems, Up to 3 Heat/2 Cool Dual Fuel Systems, Up to 2 Heat/2 Cool Conventional Systems

Features the following alerts and reminders:
Battery Replacement, Dehumidifier Filter, Filter Change 1, Filter Change 2, Heat Pump Error, Humidifier Pad, Memory Error, Sensor Error, UV Bulb 1, UV Bulb 2, Vent Filter


  • Application:
    Multi-Stage (Heat/Cool)
    Heat Pump
  • Changeover: Manual
  • Display:
  • Stages:
    2 Heat/2 Cool
    3 Heat/2 Cool Heat Pump
  • Mount:
  • User Interface:
  • Programmability:
    7 Day
    5-2 Day
    5-1-1 Day
  • Power Method:
  • Operating Temp Range:
    37°F to 102°F
    3ºC to 39ºC
  • Color:
  • Humidity Range:
    5 to 90% RH (non-condensing)
  • Wireless:
  • Voltage:

Ships With

  • T6 PRO Z-Wave Thermostat
  • UWP Mounting System
  • Honeywell Standard Installation Adapter (J-box adapter)
  • Honeywell Decorative Cover Plate – Small; Size 4-49/64 in / 121mm
  • Screws and anchors
  • 3 AA batteries
  • Professional Install Guide
  • Getting Started Guide

Shipping & Returns

Free US continental shipping for orders over $150; $5 for orders $99 or less. In most cases, any order received prior to 12:00 EST ships the same business day. Orders placed on a weekend or holiday will ship on the next business day. Shipping charges calculated at checkout.

No drop shipping - all stock warehoused in the USA so you won't be charged any import duties for shipments within the USA.

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  • fast delivery

    Free, Fast Shipping

    Free shipping in the USA for orders over $150. Or $5 for orders $99 and under.

  • 1 Year Warranty

    All new items, including open box, covered by 1 year warranty.

  • returns

    Hassle-Free Returns

    Returns within policy accepted up to 30 days after purchase.

Frequently asked questions

How can I set up a password on the Honeywell T6 Pro to prevent anyone from changing the temperature?

To set up a password, follow these steps:
  1. Press the Menu button on the thermostat.
  2. Scroll to the Screen Lock setting.
  3. Press the Select button and choose Full Lock.
  4. Select a 4-digit pin and confirm it.
  5. The panel is now locked. Make sure to remember the code.

What is the lowest temperature setting for the Honeywell T6 Pro thermostat?

The lowest temperature setting is 40 degrees Fahrenheit.

Is a C-wire required for the installation of the Honeywell T6 Pro thermostat?

A C wire is not required and fully optional. You have the option to connect a C wire or you can use batteries instead.

Can I set a minimum and maximum temperature to prevent people from damaging my AC units?

Yes, you can set a minimum and maximum temperature limit within the Honeywell T6 Pro in order to protect your AC units.

If connected to a Z-Wave hub, can I control the Honeywell T6 Pro both directly and through a Z-Wave app?

Yes, you can control the thermostat directly using the device interface, through your Z-Wave hub app, or both.

Is the Honeywell T6 Pro thermostat compatible with the variable speed blower on a furnace?

No, the thermostat offers options for Fan On/Off/Auto control, but it does not control variable speed blowers.

Is there an outdoor sensor that can report the outdoor temperature to the thermostat?

Yes, Honeywell offers sensors that can report both indoor and outdoor temperatures. These sensors need to be purchased separately. Alternatively, you can use temperature data from your Z-Wave hub or Z-Wave sensors connected to your hub.

Does the Honeywell T6 Pro thermostat's screen go off when inactive?

Yes, the thermostat's screen can be set to different brightness levels or no backlight when idle. When you touch the screen, the backlight will come on at full brightness. After one minute of inactivity, the screen will revert to the idle brightness level. Using a Z-Wave controller, you can adjust these settings throughout the day.

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