Error code reference

Whirlpool Refrigerator Error Code 4 pulses

Optics status LED output

Whirlpool codes Whirlpool refrigerator codes

Optics status LED output: The relay is defective on the ice maker emitter/receiver boards.

First step from the service manual

Replace both the emitter and receiver boards.

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 4 pulses.

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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M+ Max·Whirlpool Refrigerator

4 pulses on my Whirlpool WRS325SDHZ

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Optics status LED output: The relay is

From Tech Sheet W15198900, p.32:

1.Replace both the emitter and receiver boards.

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 4 pulses.

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