Restore the automatic dosing reliability of your Mazzer Major V grinder with the genuine Mazzer Wired Cup Activation Switch + plate (Part \# M28237). This crucial OEM replacement ensures accurate, hands-free dosing by instantly detecting the portafilter or dose cup to initiate the grinding cycle. If you are struggling with a Mazzer Major V that is **not grinding automatically when portafilter inserted** or if your dosing switch is inconsistent, this factory-specified assembly is the definitive solution to **fix intermittent grinder activation**. Key features include the pre-wired microswitch for simple electronic connection and a durable mounting plate for perfect alignment and reliable function throughout thousands of duty cycles.

Engineered to Mazzer's exacting commercial standards, the M28237 switch assembly guarantees the precision required in high-volume settings. The immediate benefit is restored workflow efficiency, eliminating manual errors and ensuring consistent coffee dose quantity, which is vital for espresso quality. Usage is straightforward: replacing a failed or sticky switch with this part directly impacts your speed and consistency. Stop asking yourself **why is my Mazzer Major V grinder cup switch broken?**—replace it with this durable, official component and maintain peak operational performance.

This genuine Mazzer part (M28237) is specifically compatible with the Major V grinder models. It operates as the primary sensor for automatic dosing. Specifications include the complete wired switch assembly and metal mounting plate. By investing in this OEM replacement, you guarantee compatibility and protect your grinder’s sensitive electronics, preventing expensive downtime and ensuring that your Mazzer Major V operates exactly as designed.