Tried searching around for this problem, but not sure if some are having this issue. I'm in a 2017 T680, and occasionally if I have the blower on high in the sleeper and usually doesn't matter the temp I have it set at, it shuts off. All the controls shut off as well as if the sleeper button on the controls in the front was pressed, but the light is still on. After about a minute it starts to turn back on.