I recently purchased a new/used craftman air compressor from a yard sale, The guy I bought it from said he bought it 4 years ago and has never used it because it would keep blowing the circut breaker in the garage upon start up. and he just never got around to returning it or repairing it. I bought it and brought it home and sure enough it will blow the circut breaker in my garage circut box within 5 seconds, and the pipe gets very hot in that length of time. The compressor is an electric 120 volt, 15 amp with a 6 hp motor and a 33 gal tank, The circut I tried it on has a 20 amp circut breaker that I also I swapped out just in case of a bad one and still the same problem, also the circut has nothing else drawing from it, It only has 1 plug on it that is above my work bench. Any Ideas as to what the problem could be?