which are applied to additional detectors of detector circuit 14 that produce responsive detection signals on outputs dho 39 and dco 39 respectively alternately fewer or more stages are provided and the modular design illustrated in fig1 facilitates such flexibility the reference voltage is the same for all six detectors for the same temperature setting while the amplitudes of the four sensor signals on outputs ho 39 ho hp cp co and co 39 differ from one another by preselected incremental amounts accordingly the detectors generate detection signals at different preselected temperatures the difference in response temperature for adjacent pairs of detectors may be selected to be the same or to be different depending on the application of the thermostat for example an incremental difference of 0 0202 volts between sucessive detectors at a temperature of 25 degrees centigrade has been found suitable to the desired result of providing a dead zone of approximately 1 0 degrees centigrade between all adjacent stages the electronic thermostat has two cycles a heat cycle and a cool cycle the heat cycle has three stages a primary heat stage which is activated when a detection pulse is produced on output dhp a second or heat override stage which is activated when a detection pulse is produced on output dho and if provided a third or secondary heat override stage which is activated when a detection pulse is produced on output dho 39 the cool cycle has a primary cool stage which is activated when a detection pulse is produced on output dc a second or cool override stage which is activated when a detection pulse is produced.