WAESCHETROCKNER

A clothes drier (1) of the type in which heated air is moved to an exhaust (9) through a rotating drum (6) in which clothes to be dried are tumbled, has an exhaust temperature sensor and a reference temperature sensor (16) connected in a circuit, arranged to switch "off" a heater (10) to the drier when a desired manually set temperature difference between exhaust and reference temperature is reached. A clock control selector (25,32) selectively lowers the required exhaust temperature if the original preset temperature is not reached within a predetermined time so that loads of clothes of varying size and initial wetness will be dried to substantially the same dryness as selected by the user.