replacing a disconnect switch on a trane intellipack? what you need to know, plus tips to make your life easier. this unit is less than a year old. The unit burnt up a lug on the main disconnect due to loose connections and pinched wire insulation. upon inspection, I found loose and/or cross threaded bolt on fuses in the main control panel. we lost a VFD and burnt up blower motor wire connections. 6 Guage wire loosely connected with blue wire nuts at the blower motor electrical connection point. check all your connections on start-ups and help prevent major issues.