Miele Electronic Unit EDW S20203/81 for Boost CX1

Miele part 11314142 is the electronic unit EDW S20203/81 — the main control board assembly for US-market Boost CX1 bagless canister vacuums. This PCB is the brain of the machine: it reads the rotary suction selector, regulates motor power across the four electronic speed settings, and manages the vacuum's protective shut-off behavior.

Electronic-unit faults on the Boost CX1 typically show up as a vacuum that won't power on despite a good cord reel, suction stuck on one speed, or erratic on/off behavior. If the motor and cable reel test fine, this board is the usual culprit, and replacing it as a complete assembly is the repair Miele's own service network performs.

The /81 designation identifies the North American 120 V version of the S20203 board, so be sure your machine is a US model. Fits: Boost CX1 series canisters including the SNCE0 (Cat & Dog), SNRE0 and SNRF0 PowerLine variants.

As an authorized Miele dealer, evacuumsandmore.com sources this control board directly through Miele's genuine parts program — important for electronics, where counterfeit boards are a real safety risk.