A refrigerator, also called a fridge, is a piece of mechanical equipment that keeps food or water cold and aids in food preservation for future requirements. Godrej refrigerator repair service center in Hyderabad. Call now: 8688821604, 9177711167. The refrigerator operates on the same principle as an air conditioner. It uses a vapor compression refrigeration cycle to cool the refrigerator and produces coolness from the evaporator, which is then utilized to cold food or water according to our demands.