Kombucha freezing temperature

[Sadu]

Heya everyone. Quick question.

I've got a kegorator with 3x 5G corny kegs of beer and a 1.25G mini-keg of kombucha.

Last few days the kombucha keg is freezing and I need to bring it up to room temperature to defrost. The beer kegs are pouring beautifully and never give problems. I've adjusted the thermostat on the fridge, but at the same time I like my beer cold. The kombucha keg is also at the front, furtherest away from the cooling coil.

Is there a science reason that the kombucha keg keeps freezing? It's got pureed watermelon in there for flavour if that makes any difference.

 

[Yooper]

Well, kombucha as very little alcohol, so it would be likely to freeze at 32 degrees, like water does. Beer has alcohol, so the freezing temperature would be lower.

 

[Atalanta]

How much pressure is your booch? Higher pressure will help to keep it from freezing.