Error Code 126 signifies inadequate communication between the thermostat and the furnace or AC unit. Consider turning off both the furnace and the AC, then powering them back on to …

Error 126 on the ComfortLink II thermostat indicates a communication fault between the thermostat and XL20i heat pump. Check the thermostat wiring connections for looseness or …

Facing error code 126 on your Trane XL20i display? Discover expert tips and step-by-step solutions to reset your system and resolve the issue quickly!

Error code 126 on Trane Comfort Link ii. It is a 2009. The model is XL20i (not sure if that is the model) Started today. Customer

Troubleshooting your Trane AC System? Discover expert answers for Error Code 126, SOP 004.01, and CFG 001.04. Get solutions and tips from real customer conversations!

Aug 2, 2011 · Trane Error 126? New Trane XL20i with XC80 (installed about 6 months ago). Error code 126 appeared on the t-stat while cooling to 72 on a 95 degree day. I turned the breakers …

An HVAC technician can assist with your Trane Comfortlink II thermostat displaying error code 126. How would you prefer to connect with the technician - via phone call or online chat?

The code 126 indicates a communication issue between the thermostat and the unit. Could you please try power cycling the unit again? Additionally, if your thermostat has a battery, it may …

Upstairs AC is completely out. Err 126.00, SOP.004.01, CFG.001.04 is popping up on the thermostat. Trane- I don’t know I

Oct 29, 2018 · I have error code 126 trane comfortlink link ii and AC now shut off and red star liqht. Thoughts on issue?