Read the manual tonight right after I unboxed the how to change fuse on costway AC es10113us.  Manual showed the voltage to be 250v so I plugged it in to my 240v outlet and heard a loud pop (internal fuse I hope) and then I read the very small print on the power cord plug and it read 120v!  What?! I cannot find anywhere online or in the manual about how to change the internal fuse. Help? Anyone?