Maytag model MGDB850YW1 continues to knock out thermal cutoff fuse despite cleanout of lint. I replaced the high limit fuse and thermal cutoff as instructed and later replaced coils, thermister and thermal fuse but unit continues to knock out thermal fuse after a few loads. The thermister and thermal fuse tested good but replaced with aftermarket brand as a test. I cleaned out the exhaust tube to the outside of house but it was not that dirty with lint. The only thing I did not take apart is the blower housing to clean it but it does not look very dirty. I get a strong flow of air to outside of house.