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How do i fix one side freezing much slower than the other?

I have a bunn ultra II and one side freezes in normal time but the left side takes about 30% longer. And in harder conditions like with alcohol or warmer temperatures, it may not freeze at all. To be clear, it does freeze. All the problems and solutions oI can find are for when one side just quits working

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It needs an ambient temp of 75-80 degrees to work well. to hot, it struggles and can't cool down. make sure you have at least 6 inches of space behind the machine so it can breathe, and clean the filter regularly. the mix has to have a brix level (water to sugar or "antifreeze" ratio) of about 12. to rich and it won't freeze. to lean and it'll ice up. alcohol brix is too high. you may also have a small refrigeration leak

Posted on Sep 08, 2014


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Posted on Jan 02, 2017

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SOURCE: my ultra 2 is not freezing anymore and screen says

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.

Posted on Jun 30, 2009

  • 1618 Answers

SOURCE: i have a dual machine. the left side freezes

Check the temp sensor on the machine(each side has its own sensor).

Posted on Jan 26, 2010

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SOURCE: We were having trouble with one side not freezing

You need to go through the menu and tell the machine that the maintenance is done, hold down the middle button to get to the menu, then follow on screen prompts and navigate to shaft seal maintenance.

Posted on Sep 08, 2010

  • 2237 Answers

SOURCE: I have an Ultra 2 bunn slush machine. One hopper

make sure it's mixed properly. if there is toomuch water, it'll freeze solid. if the mix is too rich, ice will form on the outside of the bowls. you may also have a low refrigerant level.

Posted on Feb 13, 2011

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1 Answer

Why is slush machine only freezing on one side

if it's a cab faby and it's the right side not freezing but getting cold, you have low refrigerant. if it's warm, you have a stuck solenoid, blocked capillary tube, or a bad torque micro switch. if it's a bunn ultra 2, you have a bad solenoid or the freezing button is not on freeze.

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I have bunn slush ultra 2. 1 side freezes 1/2 way, like slushy a little bit but still watery, other side is only chill. both are set to 16 thickness.

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

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the mix is too rich. add some water to each side. it freezes based on torque, not temp.

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go into the menu (hold down the "gourmet" button) and select reset all. then check your mix to make sure it's the proper ratio. too lean will cause it to freeze too fast.

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The left side of the machine is freezing, but it's pushing all of the frozen product to the top of the lid and overflowing

each side should only have 2 to 2 1/2 gallons of mix. there is a line on the bowl that is the max fill line. as it starts to freeze, the auger pushes the product to the front and up. if it's too full, it'll over flow. just empty some out.

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I have an Ultra 2 bunn slush machine. One hopper

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