Originally Posted by
Banana Joe
Our FCOM has the same definition of freezing condition but it does not state when to place the switches to on. I'll ask an instructor in the company this week.
The last sentence in the above quote is probably the most sensible part of this thread... it doesn’t matter what X, Y or Z airline does, just do what it says in your airline’s manuals, and if you’re not certain ask your company trainers or chief pilot. Don’t start making stuff up because you did it at the last company or your mate does it at his or you read it on an Internet forum.