Error code reference

Merloni Oven Error Code ER01

Oven temperature too hot during pyrolysis cycle (detected by oven PTC sensor).

First step from the service manual

Verify functioning of PTC (ambient temp should read 545 ohm), then replace if necessary.

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
Verified part numbers when replacement is required

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M+ Max·Merloni Oven

ER01 on my Merloni Oven

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Oven temperature too hot during pyrolysis cycle

From Service Manual 634198, p.50:

1.Verify functioning of PTC (ambient temp should read 545 ohm), then replace if necessary.

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 ER01.

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