My Kenmore dryer is only drying some of the time...there appears to be no rhyme or reason for it. The following parts all check out to be okay: thermo cutoff (hi-limit); heating element; thermostat (250 degrees); thermal fuse; and thermostat (internal bias). The schematic provided on the back panel of the dryer does not show a lot of detail. I've already checked for any loose wires, the plug-in itself, and the fuse box. What else could I check? Any suggestions would be greatly appreciated...