This is a smart ultrasonic humidifier used seasonally (often heavily in winter), where mineral buildup and water exposure drive wear. Repair vs replace depends on whether the issue is cleaning/maintenance (scale on the transducer, clogged pathways) or electronics failure (power board, sensors).
If performance drops, thorough descaling and replacing filters (if used) is usually the first "repair" step and often restores function cheaply. If the unit won't power on, leaks persist despite new seals, or the transducer fails, replacement is typically more economical because parts and labor quickly exceed the device value.
Use the threshold strictly; humidifiers are generally not cost-effective to service professionally. A tipping factor is hygiene: if you can't keep the tank and internals clean or you detect persistent odor/mold risk, replacement is often the better health and safety choice.
Also consider that smart connectivity is a convenience feature; if Wi-Fi fails but humidification still works reliably, you may choose to keep it as a "dumb" unit rather than replace immediately.