ComfortLink™ II XL850

Trane Comfortlink XL850

Trane ComfortLink™ II XL850 Communicating Control with built-in Nexia Bridge combines communicating system technology and a home automation hub to remotely control your home, comfort, and energy use. It’s easily accessible from a smartphone, tablet or computer, which makes adjusting the temperature for your family’s comfort a breeze.


The ComfortLink™ II XL850 combined with Trane’s TruComfort Variable Speed System works with a network of controls and sensors to optimize the temperature and humidity by adjusting compressor and fan speeds in real time to give you the most comfortable air conditions as efficiently as possible.

Connectivity and Control

Connect and control your thermostat from a smartphone, tablet and computer*. With the XL850’s Nexia smart home built in bridge you have the flexibility to remotely monitor and control over 200 smart home devices. Smart home devices you may control with Nexia include your home’s lights, locks and even your garage door from virtually anywhere with the Nexia app or with the convenience of your voice through an Amazon Alexa or Google Home enabled devices.**

Real Time Diagnostics

Nexia can monitor your HVAC system real time with the Nexia diagnostics and alert your Trane dealer if there is an issue. With your permission, real time information is easily accessible for your dealer so they can remotely view details on how your heating and air conditioning system is performing.

Key Features

  • Wi-Fi or Ethernet Connectivity
  • 4.3″ Diagonal Color Touchscreen
  • Built-in Nexia Bridge
  • Program up to 4 schedules a day, 7 days a week

* Requires internet service and connection to Nexia.
** Nexia remote climate access is included with the purchase of a connected control. Adding smart home devices to your Nexia system may require a monthly subscription. Ask your Trane Dealer for details.

  • 7-day Programmable
  • 5 heat / 2 Cool
  • Zoning Capability: No
  • Screen size: 4.3″
Characteristics Comfortlink™ ii XL1050 Comfortlink™ ii XL850 XL824
Nexia™ Remote Climate Access X X X
Nexia™ Connectivity Wi-Fi or Ethernet Wi-Fi or Ethernet Wi-Fi or Ethernet
Nexia™ Bridge Built-In Built-In Built-In
Compatible with Communicating and Variable Speed Systems X X
Touchscreen 7″ full color 4.3″ full color 4.3″ full color
Programmable (days/schedules per day) 7 / 4 7 / 4 7 / 4
Heat/Cool Stages 5 / 2 5 / 2 5 / 2
Adjust Home Temperature Remotely X X X
Upgradable Software X X X
Nexia™ Diagnostics X X X

Make a selection

Deluxe Programmable Thermostats
Deluxe Programmable Thermostats

Your comfort, optimized

Deluxe Programmable Thermostats
Deluxe Programmable Thermostats

Your comfort, optimized

Deluxe Programmable Thermostats
Deluxe Programmable Thermostats

Your comfort, optimized

Non-Programmable Thermostats
Non-Programmable Thermostats

Simple system control

Honeywell 5000