I updated my D100/D120 pair from 4.2 to 5.1.1 over the weekend include removing the always hot wire. Everything worked fine for several flights until yesterday. I left the plane outside overnight and the temps dropped to about -12C (yeah Canada). When I started the flosty plane the D100 would not power up, tried seveal master on/off's but no change. After running for 5-10 min or so the cabin began to thaw out the D100 just powered up on it's own with a temp out of spec error or something like that and then operated normally. I'm sure I've fired things up on colder days than that with 4.2. Just wanted to know what going on.