A friend had to replace the TV in his 2-year old fifth wheel, and the dealer told him it was because he left the TV in the RV while winter storing it. Admittedly, he lives in Marquette, MI, but now...
We have one in out TT and one in our TC. Been there since purchased and never brought in for winter, last night it got to -15 as in years past. No problems so far. One was new in 2013 the other in 2000. They seem to survive winters here in Wyoming just fine.