One Hour Heating and Air Conditioning in San Antonio has received mostly positive reviews from customers. Customers appreciate the company's furnace repair service, with service technicians like Isaac being praised for their knowledge, professionalism, and friendly nature. Customers also commend the general contractor services provided by Elmer's AC, noting their promptness, reliability, and great customer service. The company employs skilled HVAC professionals who prioritize customer satisfaction and maintain high standards. They have built a team known for their expertise and honesty, ensuring a positive experience for customers.