Suzuki Alto AC Coil Bellow Sensor | Common Issues & Fixes! The evaporator temperature sensor in your Suzuki Alto’s air conditioning (AC) system plays a crucial role in monitoring the temperature of the evaporator coil. This sensor ensures that the evaporator doesn’t freeze during prolonged AC operation by signaling the system to regulate the compressor’s activity. Common Symptoms of a Faulty Evaporator Temperature Sensor: Continuous Compressor Operation: The AC compressor runs without cycling of