An appliance warning system comprises a floor pad for location on or adjacent a device such that a user must stand on the floor pad in order to normally use the device. The floor pad has at least one switch movable between an open position when no weight pressure is detected on the floor pad and a closed position when the switch is activated by weight pressure detected on the floor pad. A transmitter is provided for transmitting a signal depending upon whether the switch is in the open or closed position. A warning device is activated when the switch has been in the open position for a preselected period of time after having been in the closed position.