Too cold in Texas and their systems weren't designed and built for subzero temps. Stuff is freezing up. Just like most of the new construction having all electric heat. Don't put all your eggs in one basket.
I was talking to my cousin in Texas (her brother is the one that died), in addition to dealing with her brother dieing, her power went out and even before it did, the heat pumps they use down there could not keep up...
My dad tried heat pumps in this house back in the 80's when he switched it over from electric, and ended up replacing them with regular furnaces because they can't handle the cold weather of winter...
