Error code reference

Merloni Oven Error Code ER33

NTC sensor on display board is short or open circuit.

First step from the service manual

Replace Display Board.

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

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Step-by-step tests with expected resistance, voltage, and continuity values
Wiring diagram references and connector pinouts from the OEM service manual
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ER33 on my Merloni Oven

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NTC sensor on display board is short or open

From Service Manual 634293, p.25:

1.Replace Display Board.

2.Measure control board supply voltage at the test points. Expected: 12 VDC and 5 VDC; a drop below 4.75 VDC on the logic rail points to a failed onboard regulator.

3.Inspect all connectors on the main control for corrosion, thermal stress, or backed-out pins. Reseat each connector with the power disconnected.

Part WPW10804018

Electronic control board

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First step from the service manual

Get the full diagnostic procedure for ER33.

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