A method of operating an electric circuit controlling device with the device having a housing, a seat in the housing, and a snap action member having discrete snap action movement between a stable configuration and an unstable configuration. The snap action member in its stable configuration is moved from a preselected position displaced from the housing seat into engagement therewith, and the discrete snap action movement of the snap action member from the stable configuration toward the unstable configuration thereof is effected when the snap action means is engaged with the housing seat.