Grinder Doser Automatic Stop Micro-switch (21A) This 21A micro-switch tells an automatic-dosing grinder when to stop dispensing coffee, based on the doser chamber cam. It's the same underlying part used across the Astoria-CMA K-series grinder assembly and the Compak and Wega grinders that share that platform. SPECIFICATIONS Rated: 21A micro-switch COMPATIBILITY Fits: Astoria-CMA K6 grinder assembly; Wega K6 grinder assembly Fits: Compak K3, K3 Elite, K5, K6, K6 Barista Professional, K6/K6 Telescopic, K6 Silenzio/K6 Silenzio T, K8 Silenzio/K8 Silenzio T, and K10 Conic/K10 Conic T/K10 Conic WBC models Works with: automatic doser stop/timing mechanism INSTALLATION Moderate difficulty, involves accessing the doser cam assembly and reconnecting wiring; a qualified technician is recommended if you're not comfortable working inside the doser body. PRO TIPS If your doser grinder won't stop dispensing automatically (or cuts off immediately when it shouldn't), worn or pitted switch contacts here are a common culprit, test for continuity with a multimeter before assuming the timer or motor is at fault.
