Sounds like the compressor is still running. Fan motors don't clunk when they shut off but compressors do. Take off the cover on the airconditioner and observe if the condensor fan is running, if not and you still hear and feel a motor running, your compressor is still running. Might be the relay on the control board sticking on. Be careful while on the roof and take care. Seeya on the road..
2003 Newmar Kountry Star 3905, Freightliner XC chassis with CAT 330. Winnie the black lab, pretty Airbus captain wife, retired airline pilot with 11 grandkids. UH-1 pilot (Huey) U.S. Army 1967-1983. RVN 68-69. Northern Idaho my summer home.