How To Replace Trane Thermostat Battery. Many modern thermostats rely on battery. You will have to change the batteries around once a year or more often depending on your battery quality.
How to Replace Thermostat Batteries. A blank or unlighted screen could indicate a thermostat failure. I have a Trane thermostat 900 series.
When your screen is blank it could indicate you need to replace the batteries.
Also they may be the reason why you are having a blank thermostat. A plus and minus sign in the battery tray or cover indicate the proper position for the battery. But if yours uses batteries remove the front cover of the thermostat from the wall plate and in the battery slots you see at the back of the thermostat change the batteries. The red light is blinking in the air handler circuit board.
