Re: I have an Ultra 2 bunn slush machine. One hopper
I have come across this problem before. If it keeps freezing in the off mode more than likely you have a faulty main PC Board. Contact here at Just Refrigeration we do have spare main PC Boards for the Bunn Ultras www.justrefrigeration.com.au Mike
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the word "gourmet" next to the display is a button. hold it down for a few seconds and you'll get into the menu. keep pressing and releasing "gourmet" until you get to "factory reset" and select yes. after that, you'll have to reset all the other settings like the clock and the defrost timer.
make sure both say "ICE" on the display. press the snowflake buttons on the front to get it there. also, make sure you are mixing the product properly. if still an issue, you may have a small refrigeration leak that should be looked at by a professional
Check the back of the machine where the big plastic cover is, you will have to remove the 2 screws back there, and the 2 hoppers as well as the metal platform. When you remove the cover you will notice a mountain of product covering the shaft and the little CPU board back there, clean replace shaft seal and bushing and make sure that the red and white lights on the board have no product on them.