How do I access the installer setup (ISU) on a RTH6350/RTH6450/RET93E/RET95E thermostat?
- To begin, press and hold the Up arrow and FAN buttons until the display changes.
- Press Up or Down to change settings.
- Press NEXT to advance to next function.
- Press DONE to exit and save settings.
For more information on the ISU, please see pages 5 and 6 in the manual. Click here to download (English)