One reason for the leak is the drain holes in the unit bottom/pan are plugged with debris. There should be about 6 drain holes around the perimeter of the pan lip. Then the evaporator coil has its own small drip pan, again with holes around the lip.
2000 Winnebago Ultimate Freedom USQ40JD,
ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam Life member,FMCA." My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy