i90: Sensor Fault

If your Zanussi dishwasher display is showing the i90 error code, you've landed on the right page. This message means your dishwasher has detected a fault with one of its sensors, most commonly either the turbidity sensor, which monitors water clarity, or the temperature sensor, which tracks water heat during the wash cycle. When these sensors malfunction, your dishwasher can't accurately gauge whether the water is clean enough or at the right temperature, so it stops the cycle to prevent potential problems. The good news is that many i90 faults are straightforward enough for a confident homeowner to diagnose and fix without calling out an engineer. In most cases, the issue stems from a sensor that's become dirty or loose, rather than a complete component failure. The turbidity sensor and temperature sensor are the prime suspects, though occasionally the fault lies with the wiring connections leading to these parts or the control board itself. Before you worry about expensive repairs, we'll walk you through some simple checks you can perform yourself. With a bit of patience and basic tools, you may be able to get your dishwasher running normally again.

Many i90 faults can be resolved by a competent DIYer. Always disconnect from mains power first. If unsure, consult a qualified engineer.