I bought a house a year ago with the original "Carrier" unit. It worked PERFECT last summer. My fiance' and I live in memphis, where currently the heat is around 115 with the heat index. The house will not get below 86-88 when I get home from work...usually around 5-530. I have a had the freon charged, duct work checked, the a-coil has not been cleaned. It is HARD to get to. I think that I can clean it myself, if i know this is indeed the problem. My airflow in the kitchen, and master bedroom is great, but the office, spare rooms and den are very faint. The air that blows out, seems to come out at the temp i set the thermostat...any help would be a god sent. dont want to pay folks any more not to fix the unit. thanks!