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Digital Thermostat

Thanks to our advanced ComfortLink™ II communicating technology, the XL900 links all of the main components of your system to maintain your perfect temperature and humidity.



ComfortLink™ II communicating capability

Connect all of your key components through ComfortLink™ II communicating technology, so your system automatically charges, configures and calibrates for optimal performance through the lifetime of your products.

Reliable Operation

In addition to the benefits of the precise calibration and maintenance alerts of the communicating system, materials for all components are tested again and again for long-lasting performance and reliability.

Effortless programming

A clear, menu driven setup makes programming quick and easy.


Every Trane Thermostat is packed with high-quality components. Each helps ensure that time after time, your unit will provide total comfort your family can rely on. The XL900 Series 7-day Communicating Programmable Comfort Control includes:

7-day programmable and Energy Star qualified

ComfortLink™ II compatibility

Diagnostic alert light

Critical error codes messages let you know if a problem arises

Bright back-lit display with interactive touch screen

Programming functions stored in permanent memory

Auto changeover

Programmable fan

Filter change reminders

Humidifier pad change reminder

Humidity sensor

Dehumidification control

Keypad lock

Built-in outdoor temperature sensor

Dual-fuel compatible


XL900 series 7-day communicating programmable control