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ComfortLink® II XL850 Thermostat

Smart Thermostat — ComfortLink™ II XL850 — Trane

Offers and estimated costs for Edit Location

What's included in the price?

Pricing varies by location and dealer in addition to several other factors.

Technical Specs

Cooling Stages
Heating Stages
Comm/Variable Compatible
Touchscreen Size
4.3" with full color

Additional features of the ComfortLink® II XL850 Thermostat

As a Smart thermostat, ComfortLink II XL850 delivers an intuitive, colorful, user interface that you can easily control from phone, tablet, or laptop so that you can achieve ideal home comfort or energy savings from virtually anywhere. The XL850’s accompanying Z-wave® devices enables you to access over 200 devices in your home for easy monitoring, so homeowners can keep tabs on their home 24-7 and get real-time data and diagnostics help if there’s ever a problem. No matter the season, you can tap into the comfort you deserve with Trane’s popular ComfortLink® II XL850 thermostat.

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Warranty & Registration

After getting a new system, be sure to protect it with a warranty.

Owner’s Manuals

Learn more about your product, like its technical specs and innovative technology.


Discover how you can troubleshoot your HVAC system.

Where do you go from here?

Step 1

Research your needs

Consider your home comfort level, climate, ductwork, energy use, and desired monthly heating and cooling costs.
Step 2

Get a dealer quote

Schedule a visit with your dealer for a custom recommendation. Visit our Dealer Locator page for a list of questions to discuss with your dealer.

Step 3

Fix or upgrade your unit

Gather all your information to make a replace or repair decision. Follow up with your dealer and enjoy your new or improved HVAC.

Contact a local dealer

Dealers can answer questions, help you find the right products for your home, and repair your system.

We’re here to help

Connect with our Customer Care team about your products, warranties, and dealer concerns.

Available Monday – Friday from 7am to 5pm CST


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