A controller and a control method for activating temperature control of a device of a vehicle, the controller configured to, in a first mode, activate temperature control of the device of the vehicle when a measured temperature of the device passes a first threshold temperature; determine when a condition dependent on a journey of the vehicle is satisfied, and switch from the first mode to a second mode; and, in the second mode, activate the temperature control of the device when the measured temperature of the device passes a second threshold temperature, different to the first threshold temperature, wherein in the second mode, the measured temperature of the device passes the first threshold temperature without activation of the temperature control of the device before passing the second threshold temperature activating the temperature control of the device.