In article ,
Mxsmanic wrote:

From what I understand, icing protection should be turned on if the
outside temperature is 5° C or less. However, what is the reason for
not having it on all the time? Does it overheat in normal weather, or
what?

No, it just wastes resources and puts unnecessary wear and tear on
things.

I read that turning on icing protection before "sufficient ice has
accumulated" may prevent the protection from working to remove the
ice. Why?

That applies only to boots. If the ice layer is too thin it may remain
adhered to the boot.

Also, what types of anti-icing stuff should I turn on? Just
everything that deals with ice (wing, prop, pitot, fuel vent, etc.),
or is there an accepted order or hierarchy for these things?

Except for boots, the safest policy is to just turn it all on if there's
any possibility of ice.

rg