A start and control method for a single-phase induction motor, the motor comprising a run winding and a start winding, the start winding being electrically associated to an electronic start device, the run winding and the electronic start device being electrically associated to an alternating-voltage source configured to supply feed power to the motor, the start winding being kept de-energized at a first instant of operation of the motor, the method being characterized by comprising the following steps: a) sampling via the start winding, through the electronic start device, a first voltage signal (Vsamp1) from the alternating-voltage source to the motor in a non-running condition; b) comparing the first voltage signal (Vsamp1) sampled at step "a" with a first voltage reference and with a second voltage reference that are pre-adjusted inwardly of the electronic start device; c) if the comparison of step "b" indicates that the first voltage signal (Vsamp1) is lower than or equal to the first voltage reference, or higher than or equal to the second voltage reference, then the electronic start device commands a start switch, so as to energize the start winding so as to initiate a start period of the single-phase induction motor; d) counting a start time (Tp) of the motor, through the electronic start device, after energizing the start winding; e) if the start time (Tp) counted at step "d" reaches a pre-established start time value (Tpest), then de-energize the start winding by means of the start switch, the switch being commanded by the electronic start device, so as to finish the start period of the single-phase induction motor; f) sampling, through the electronic start device, a second voltage signal (Vsamp2) from the alternating-voltage source to the motor in running condition; g) comparing the second voltage signal (Vsamp2) sampled at step "f" with the first voltage reference and with the second voltage reference; h) determining, on the basis of the comparison of step "g", if the motor is decelerated or in the non-running condition by total or partial interruption of feed supplied by the alternating-voltage source; and i) if the motor is in non-running condition and the alternating-voltage source is supplying feed energy, then carry out steps "a" to "e). a) sampling via the start winding, through the electronic start device, a first voltage signal (Vsamp1) from the alternating-voltage source to the motor in a non-running condition; b) comparing the first voltage signal (Vsamp1) sampled at step "a" with a first voltage reference and with a second voltage reference that are pre-adjusted inwardly of the electronic start device; c) if the comparison of step "b" indicates that the first voltage signal (Vsamp1) is lower than or equal to the first voltage reference, or higher than or equal to the second voltage reference, then the electronic start device commands a start switch, so as to energize the start winding so as to initiate a start period of the single-phase induction motor; d) counting a start time (Tp) of the motor, through the electronic start device, after energizing the start winding; e) if the start time (Tp) counted at step "d" reaches a pre-established start time value (Tpest), then de-energize the start winding by means of the start switch, the switch being commanded by the electronic start device, so as to finish the start period of the single-phase induction motor; f) sampling, through the electronic start device, a second voltage signal (Vsamp2) from the alternating-voltage source to the motor in running condition; g) comparing the second voltage signal (Vsamp2) sampled at step "f" with the first voltage reference and with the second voltage reference; h) determining, on the basis of the comparison of step "g", if the motor is decelerated or in the non-running condition by total or partial interruption of feed supplied by the alternating-voltage source; and i) if the motor is in non-running condition and the alternating-voltage source is supplying feed energy, then carry out steps "a" to "e).