"frozen solid I can't say" sorry typo. Not tried to remove Ice yet, but I would imagine if the surface could be broken with the nozzle then no problem, If it was frozen solid I would leave it for a warmer day!!!
Its a powerful machine, most domestic jobs we don't even use all three motors as its too powerful. two motors is good for most domestic stuff unless the gutters are really full. Three motors for wide commercial gutters and height work.