Above system was put in new 2004 and just bought this house in 2014. Anywhoo, when we hit the 85 or higher temp, the ac system just keeps running for one and a half hours just to cycle. Both ac repair guys said we have adequate freon and system is good. The last guy said to put more ceiling fans. The problem happens when we have high humidity which is pretty much all summer on the gulfcoast. Note: If we raise temp to 79 or 80, it will cycle but at 78, it just runs! ??????