Look at the photo in Post #17: the deicing boots on the wings and the stab are clearly visible.
They don't work very well in heavy icing conditions. That is why airlines got rid of them in the midwest years ago. I remember seeing a crash investigation about the ATR-72 that crashed in Indiana while in a holding pattern to land at O'Hare. The pilots had the aircraft trimmed out in such a way that ice still built up on the wings.