Hit dont work. What should I do? The supply fan runs. The supply thermistor's OK. On test all the systems run. The troubleshooting nonsense was not helpful. It won't start in default mode after fifteen minutes. It's wired to an invensys controller that I'm about to unwire. There is a relay from the controller I haven't jumpered yet, but that's next. Q: Is it something others have encountered before? Will I have to call Trane?!