Today is the first day of meteorological winter and it's supposed to be a cold, snowy one this year. Customers throughout the northern part of the US and Canada should make sure that their machines are free of water prior to leaving their facility.  If you are sending the machine out for repairs or have sold it to someone else, the last thing you want to have happen is for the water to freeze and a something major or minor to crack during shipment. 
People all over the country should make sure that the goods they've received from anywhere are properly prepared prior to shipping.  You can't be certain that truck from California to Indiana isn't going to overnight in Wyoming.   And one night is all it takes.