DND Heating & Air Conditioning is a full-service AC repair company serving Mckinney TX and surrounding cities. We strive to make our customers happy. We work on residential and commercial air conditioning systems. All major brands and AC system types are repaired by us. Not all air conditioning companies are the same. We are here to make sure you know the difference between a good AC repair technician and a bad one. We have a licensed and factory-trained expert technician answering the phone 24 hours a day.