Bosch appliances use modular control systems with embedded fault detection, but actual diagnostics often require interpreting blink codes or retrieving stored errors via test modes. Their European-style builds feature compact, tightly integrated components — which complicates disassembly and access. Many models rely on proprietary connectors, and sensor calibration must follow manufacturer-specific resistance thresholds. Technicians typically perform drain pump resistance checks, thermistor range testing, PCB trace inspection, and motor brush evaluation. Some repairs — like inverter board or door latch service — require anti-static handling and firmware compatibility verification.