Axberg was the HVAC company that installed our replacement furnace in 1995. Our Carrier furance was initially problematic because of faulty computer boards. Over two years Axberg was hopelessly incapable of fixing it under warrenty. After the warrenty expired, Axberg wanted serious money to repair the furnance's continuing problems. My husband got Carrier involved, and Carrier service techs fixed the problems in one call AND extended our warrenty at no charge for three more years. We were very dissatisified with the service of Axberg. Sadly, in Rockford IL, HVAC companies only fix the units that they install. We were stuck with Axberg. Axberg was turtle slow to respond to service calls in the last 14 years and required additional calls to fix minor problems. We had to change HVAC service companies. When our central air conditioner failed to run 7/27/09, I found Comfort Zone Heating & Cooling, which services Carrier, in the Yellow Pages. My husband explained to the person who set up the service call that we were dissatisfied with our current HVAC company and would like to try a different service. She set an appointment for mid afternoon that day. The technician called to give us a 20 minute heads' up and arrived within the scheduled time frame. He was professional and did not waste time. His equipment was neatly organized, and he did not make a mess. All repair parts were on his truck. He gave us excellent advice with regard to maintenance and operation of our HVAC equipment. The cost seemed a bit high, but Comfort Zone is a union shop (division of a commercial HVAC company). A union shop's labor is generally higher than a non-union independent. Our A/C works better than it did last season. We would use Comfort Zone again and would recommend their services.