Microedge electronics manufactures air-conditioner energy savers that consume about 1.5 units per hour and 1.5-ton unit about 2.2 units per hour. These ac energy savers are useful in saving about 10 to 15 percent energy based on using settings. The air-conditioner energy savers comes with thermostat to provide crude control of temperature that result in overshoot or undershoot of set temperature resulting energy wastage. During the failure of the thermostat the ac works continuously and it is difficult to recognize the failure and take corrective action also resulting in energy wastage. The company provides these air-conditioner energy savers with protection option combinations like over voltage trip, overload trip with mcb and 2 minutes re-switching delay to protect compressor from overloading. The air-conditioner energy savers offer energy saving of 0.2 units per hour to 1.0 unit per hour depending upon the setting chosen. Some of the salient features of these air-conditioner energy savers are installation between mains and ac; easy installation design in a minute by anybody; and easy alteration of settings.