VisionPRO 8000

PRO Install

Touchscreen your way to optimal comfort, convenience and energy savings

VisionPRO 8000 Thermostat functions like a mobile device with a touch screen and menu-driven programming. The large backlit display makes it easy to select options and change/check reminders for filters, UV lamps and humidifier pads. VisionPRO 8000 is compatible with RedLINK™, which can add Internet and wireless capabilities to the thermostat. It’s everything you need to create a comfortable environment and save on energy while keeping convenience in mind.

  • Seven-day programming
  • Touch-screen interaction
  • Large, easy-to-read backlit display
  • Dual-powered — battery or hard-wired
  • Residential or commercial use
  • Five-year limited warranty
  • Professional installation
Quick Setup
Micro SD port allows for quick installer setup
Plain Language Setup
No manual needed
Maximum Control
Control humidification, dehumidification or ventilation
Compatible With RedLINK Accessories
Works with RedLINK Internet Gateway/Total Connect, Wireless Outdoor Air Sensor, Wireless Indoor Air Sensor, Portable Comfort Control, Entry/Exit Remote, Vent and Filter Boost Remote, Wireless Adapter, TrueSTEAM, and TrueZONE Panels.
Additional Details
Up to 3 Heat/2 Cool Heat Pump or Up to 2 Heat/2 Cool Conventional systems when used standalone. Up to 4 Heat/2 Cool Heat Pump or Up to 3 Heat/ 2 Cool Conventional systems when used with the Equipment Interface Module.
  • Model Number: TH8321R1001, TH8320R1003, TH8110R1008, YTH8321R1002
  • Color: White
  • Dimensions: 4-5/8 in. High, 4-15/16 in. Wide, 1-1/8 in. Deep


Duo Vision Pro FrontView
Duo Vision Pro FrontView
Duo Vision Pro FrontView
Duo Vision Pro FrontView


It depends, if the thermostat is powered with a 24 Vac common it can be set to have continuous backlight. If the thermostat is battery powered, it cannot be set for continuous backlight.
Press the SCREEN button to lock the screen for cleaning. The screen will remain locked for 30 seconds. After 30 seconds press Done to resume normal operation. Do not spray anything directly on the screen. Spray liquids onto a cloth, and then use the damp cloth to clean the screen. Use water or household glass cleaner. Avoid abrasive cleansers.
Honeywell thermostats have a model number that begins with a TH, T, RTH, CT, TL or RLV. The location of the model number varies depending upon the thermostat. If the thermostat is battery operated and the batteries are accessed from the front of the thermostat, please check the area around the batteries. If the batteries are on the back of the thermostat or if the thermostat is not battery operated, the model number should be on the back of the thermostat once the thermostat is removed from its base. If your thermostat has a mechanical clock, the model number is on a sticker on the horizontal surface above the clock.
The FAN selection key has two or three positions: Auto and On and sometimes Circ (Circulate). The Auto position will allow the system fan to operate whenever the heating or cooling system is turned on by the thermostat. The On position will turn the fan on to run continuously, regardless whether heating or cooling system is turned on by the thermostat or not. The Circ (Circulate) position if available will run the fan approximately 35% of the time, minus any time the fan will run with the heating or cooling system.
Honeywell offers thermostats for both low voltage (24 volts) and line voltage (120 or 240 volts) systems. The most common type of voltage from a central heating and/or cooling system is 24 volts (24Vac). The old thermostat may say somewhere on the thermostat that it is for 24 volt (24Vac) or maximum 30 volts (30Vac). If you see 120 Vac or 240 Vac on the thermostat, a low voltage thermostat will NOT work with your system. You will need a line voltage thermostat. This type of voltage is common with electric baseboard heating. Regardless of the voltage, Honeywell strongly suggests that you turn off the power to the system at the furnace, at the fuse, or at the circuit breaker panel before installing or replacing a thermostat. If you are unsure about your voltage, please contact a local heating and cooling contractor in your area for assistance.
Yes. When connected with an Outdoor Sensor, select thermostats and devices will display the outdoor temperature and humidity on the screen
Yes, the packaging contained with the thermostat is recyclable. Information about recycling thermostats containing mercury can be found at:
Your thermostat is designed to control temperature to +/- 1 F. How often your heat turns on and off depends on may factors including the type of heating system you have, as well as how much your system needs to run to maintain your temperature setting (in other words, how cool or cold it is outside). A typical forced air system will cycle about five times in an hour (5CPH), this is normal. A typical hot water system would cycle less then that
If the thermostat is set for operation as a non programmable unit then it will not show Sched or Hold in the display. To check how the thermostat has been set up, please refer to the owner's manual under Advanced Functions and refer to feature 0160.
If the VisionPRO Thermostat does not allow you to change the humidity settings, then it is not setup for dehumidification or humidification control. In this case Honeywell recommends speaking to the installing contractor of the thermostat.