You wouldn't get a new car and presume you’d never have to inflate the tires, change the oil or look into odd noises. Your home comfort unit is similar to a car engine. It’s a machine with a motor, electrical parts and even fuel. So, it’s essential to have a licensed technician complete yearly maintenance on your home comfort system in Nashville. If not suitably serviced, even the best heating and AC equipment can experience problems and has decreased energy efficiency over time.