We were contracted with Central Carolina for 9 years. In the summer of 2004 (6th year of contract) we called to report a buzzing noise from the attic. A day or 2 later, they replaced a transformer in the attic unit. The buzzing noise began almost immediately after he said it was fixed and had installed a new transformer. I caught him outside right before he left and SAID the buzzing started again. He went back in the attic and said that it is NOT the transformer, but something wrong with the humidifier. I actually had no idea there was a humidifier. At that point, I asked what we should do? He said we could replace it or just turn it off. I told him to turn it off in the long run it should have been disassembled.) We thought we had a humidifier that was not functioning properly. They continued to service us with the annual contract. Between 2004 to 2007, I started to develop hives and rashes as well as sinus congestion on a regular business. My husband had reoccurring sinus infection and overwhelming fatigue for both of us that gradually became worse. The fall of 2006 we realized something serious was wrong because we started noticing an unusual odor in the house. I developed and continued an increased nauseous and vomiting feeling. My husband also suffered a mild heart attack during this period as well. March of 2007 a technician came to renew our contract for that following year and to do the spring preventative maintenance. I told him what had been going on with us and our home. I mentioned that my husband and I were quite ill and I thought something in our house was making us sick. I asked him if he thought we should add any additional filtration to our system or anything he could think of to help the air quality in our house. He told us he would first check out some things. He went to the attic. A few moments (less than 10 min) he came down with a 5 x 15 in inch filter 1/2 inch thick loaded with mold. Black and other colors, but lots and lots of black. The technician showed it to me and also reported that the first 6 feet of our duct work looked the same as our filter. When I looked at the filter I noticed there was mold. The tech said that he wasn't supposed to use the term "mold", but he conquered that it was. In regards to the humidifier and mold in connection with the A/C, I didn't understand why he found the mold filter in the humidifier because it had been turned off in 2004. He told us that just because the humidifier had been turned off, all air was still flowing through the humidifier vents. He dis-attached the humidifier and taped it up. He also told me a man named Jerry would come the next day to talk to us about replacing the system or anything else he could do. Tech said his hands were tied. I did not want Jerry to come out and talk about a new unit because I was so blown away that this had happened and didn't trust the company anymore. After all the years of services and trusting this company no one ever looked.