The pressure switch detects the water level in the tank via pressure and triggers the stop of the fill cycle, or signals the detergent level.

How to choose the right part: check the connection type (side connection is the most common, typically with a 6mm tube diameter) and the calibration — the pair of values (e.g. "56/25", "110/70") indicating the pressure thresholds at which the pressure switch triggers, specific to each dishwasher model.

Dual-calibration pressure switch: some models manage two level thresholds with a single component (e.g. Zanussi 60/20).

Compatibility by brand: available for Zanussi, Rancilio (mod. 1105), Dihr (for Angelo Po) and other manufacturers — always check the exact calibration, not just the connection type.

For other dishwasher spare parts go back to Washing and Dishwashers.

Frequently asked questions

What does the two-number calibration (e.g. 56/25) mean?
It indicates the two pressure thresholds (engage/disengage) at which the pressure switch triggers: both values must match the original for correct operation.

How do I know if the pressure switch needs replacing?
Typical symptoms are a dishwasher that doesn't fill/drain correctly, or incorrect detergent-level readings.