The smart thermostat, made Wiser.Learn more
...See what we've been doing in some of our major markets.Find your Location
Access tailored services, 24/7 self-service and expert help. Anywhere, anytime, any project.Discover now
Schneider Electric USA Website×
Explore our global offerings or select your country from one of our five regions.Global
Découvrez nos offres globales ou sélectionnez votre pays dans l’une de nos cinq régions.
Display shows EEF
All models and serial numbers
The EEF fault appears if there is a problem reading or writing information to EEPROM memory chips on either the control board or power board.
This fault is not stored in the fault history.
• The control board is defective.
• The power board is defective.
Replace the control board.
Replace the power board.