Trane Comfortlink Ii Software Upgrade

View and Download Trane ComfortLink II XL950 Control user manual online. Trane ComfortLink II XL950 Control Thermostat User's guide. ComfortLink II XL950 Control Thermostat pdf manual download. Find helpful customer reviews and review ratings for Trane ComfortLink II XL950 Control TZONE950AC52ZAA by Trane at Amazon.com. Technology - but with being an early adopter, you have to deal with buggy devices/software. And has even replaced them with upgraded versions based on new engineering revs.

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I have 3 trane AC systems with 3 Comfortlink XL950 thermostats. I am trying to upgrade their software to the latest version but can't. One thermostat has version 3.1 and the other two have version 3.0.

The latest on the Trane website is showing available version 4.0.3. When I go through internet upgrade process all thermostats tell me that there is no new upgrades available.

I have tried upgrading through SD card (it used to have that option on 2.0 firmware) but nothing happens with 3.0/3.1 installed. Matlab secant function. Any ideas or suggestions? Quick Navigation • Site Areas • • • • • • • Forums • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •.