At least I think it's the cold that's to blame. I've had my 8-mode P7 for about a year and this winter it started behaving very erratically--constantly changing modes, shutting off, then starting back up, flickering, etc. It's imperfectly correlated to going over bumps. I'm in Philly so by cold I just mean 15-30F.
Any ideas for what I can do to mitigate this?