Universal flush-mounted temperature controller for time-dependent individual room or floor temperature regulation for electric and hot water heating systems with power-off closed actuators. The device can be used as a room temperature controller optionally with an external room sensor or with an optional remote sensor as a room temperature controller with floor monitoring or as a floor temperature controller. This programmable thermostat features a weekly timer with individually adjustable programs, factory setting for "normal" daily routines. Extremely user-friendly due to intuitive operation, cost optimization through time-controlled regulation to the desired temperatures. Illuminated, graphic-capable display. Convenient installation thanks to freely wired plug-in screw terminals.