outside temp climbs until it reads 30 or 40 degrees above outside temp. on 2005 Lincoln Aviator

It interferes with the climate control itself. As the reading climbs the A/C will switch from heat to cool, until I raise the inside temp reading to above the outside reading. Ford has replaced the ambient temp. sensor and the DATC. Problem remains the same. Need help!!!

Asked by for the 2005 Lincoln Aviator