The Acaia Lunar is a premium espresso scale used daily in home and café workflows, valued for fast response and consistent accuracy. USB-C port debris or shorting is common because coffee grounds, water droplets, and steam can enter the port area during routine barista use.
Repair is worthwhile when the load cell and display still read accurately and the issue is isolated to the port or charging circuit; careful cleaning and a port service can restore function. Replacement is more compelling when the load cell drifts (inconsistent weight readings), when moisture damage affects the mainboard, or when battery swelling or repeated charging failures occur near the repair threshold.
Because accuracy is the core value, any recurring measurement instability is a strong signal to replace. Preventive habits-keeping the port covered, wiping spills quickly, and avoiding wet charging-significantly reduce the chance of shorts and prolong usable life.