Error code reference

Merloni Dishwasher Error Code AL 05

Clogged filters alarm

Clogged filters alarm - pressure switch contacts do not close after water fill and filter cleaning cycle fails; also triggered by wash motor circuit faults or pressure sensor contacts open during wash.

First step from the service manual

Check mesh plate, filter, and microfilter for clogs; also check wash motor primary/auxiliary starter connections and condenser.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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Get the full diagnostic procedure for AL 05.

Step-by-step tests with expected resistance, voltage, and continuity values
Wiring diagram references and connector pinouts from the OEM service manual
Verified part numbers when replacement is required

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AL 05 on my Merloni Dishwasher

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Clogged filters alarm - pressure switch

From Service Manual 201736, p.28:

1.Check mesh plate, filter, and microfilter for clogs; also check wash motor primary/auxiliary starter connections and condenser.

2.Measure the inlet valve coil resistance at the valve connector. Expected: 1,000 to 1,200 ohms per coil at room temperature.

3.Verify static water supply pressure at the inlet hose. Below 20 psi or fluctuating supply commonly triggers fill-timeout faults.

Part WPW10212598

Water inlet valve

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First step from the service manual

Get the full diagnostic procedure for AL 05.

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