i have been doing this a while and still haven't found a quick/easy way to get ice off the floor/shelves/product boxes ect. when you find a condensate pan that has been overflowing for a few days in a walk in freezer. I've used shop vacs with torches, hammers, mauls, shovels, electric chippers, chiseles, salt/calcium pellets, and every one turns into a major pain. I just spent over a full day in a 10 x 10 walk in freezer that had ice 4" thick at the back wall to a thin layer at the other end. The product and shelves needed cleared off as did the wall. One of the other techs at our shop spent two days with a helper at a store a few months ago, he said "dress warm, take lots of short breaks to stay warm, and get a helper." None of our customers are able to shut the freezer down while this is done because at best the box is about half full or more. I also have an account that has frozen grease/dirt from tow motors on in the active lanes of thier freezer that has been there so long it looks worse than an old drag strip.