Runs but won’t freeze: what a refrigerant leak looks like on a soft-serve machine
The call came from Tribu Grill in Union City. Their Vevor soft-serve machine sounded healthy: compressor humming, fans turning, display alive. The mix just never froze. The staff had power-cycled it twice before calling.
Problem: “Runs but won’t freeze” is one of the most misread symptoms in compact commercial refrigeration. It looks like a controller fault, and a control board is an expensive part to guess with. The cheaper and more common truth is that the system has lost charge.
Diagnostics: We connected gauges and confirmed it: refrigerant leak. On the 880 corridor we see this steadily on compact units that live in hot kitchens; vibration and factory joint quality do most of the damage. Once a system is low, no amount of resetting brings the freeze back.
Solution: A sealed-system repair means finding the leak, repairing it, evacuating, and recharging. On a premium machine that work protects a serious investment. On a budget-class unit it can cost as much as the machine did, and we say so. The owner got the numbers, a straight recommendation, and the right next step for that unit. The $99 diagnostic did its job; nobody bought a repair that couldn’t pay for itself.
Result: Same-day certainty instead of a parts-cannon guess. If your machine runs but won’t freeze, get a gauge reading before anyone quotes you a control board. Sealed-system and refrigerant work is licensed under CSLB #1136642, and Union City is a planned-route stop most weeks between Fremont and Hayward.