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Whirlpool Ice Maker Error Code No light

Possible self-check in progress, incorrect wiring, defective LED, or harvest mode active; optics boards may…

Whirlpool codesWhirlpool ice maker codes

Possible self-check in progress, incorrect wiring, defective LED, or harvest mode active; optics boards may be defective.

First step from the service manual

Unplug the refrigerator for 5 seconds, then repeat the test. If still no light, replace both optics boards.

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

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What No light means on a Whirlpool ice maker

The "No light" condition on a Whirlpool ice maker refers to the absence of an infrared or visible LED signal within the optics system that controls ice level detection and harvest cycle monitoring. The ice maker uses a pair of optics boards, one transmitter and one receiver, positioned across from each other in the ice bin pathway. When the transmitter LED fires, the receiver board detects the signal. If the receiver sees no light, the system interprets this as a full bin or a fault condition. A complete absence of light during a diagnostic test indicates the transmitter LED is not firing at all, which disrupts the entire optical sensing loop.

Several conditions can produce this result. During a self-check or harvest mode, the optics system may temporarily suspend normal LED operation, causing a momentary "no light" reading that is not a true fault. Incorrect wiring, such as a loose connector or a harness routed incorrectly during a previous repair, can interrupt power or signal to the transmitter board. A defective LED on the transmitter optics board is another direct cause, as the LED component itself can fail due to age, voltage spikes, or physical damage.

The first step in diagnosing this condition is a power reset: unplugging the refrigerator for at least 5 seconds clears any transient self-check or harvest mode state that might be suppressing the LED. If the no-light condition persists after the reset and a repeated test cycle, both optics boards should be replaced as a set. Replacing both boards together is recommended because the transmitter and receiver are calibrated as a pair, and a marginal receiver board may fail to detect even a functional transmitter signal.

Source: manufacturer service documentation.

Common causes of No light

  1. 01

    Self-check or harvest mode active

    Wiring / connection

    During a harvest cycle or internal self-check, the ice maker may temporarily suppress the LED signal, producing a false no-light reading. Unplugging the unit for 5 seconds and retesting will confirm or rule this out.

  2. 02

    Defective transmitter LED on optics board

    Part replacement

    The LED on the transmitter optics board can fail outright, sending no signal to the receiver. If the no-light condition persists after a power reset, a failed LED is the most likely hardware cause.

  3. 03

    Incorrect or loose wiring to optics boards

    Wiring / connection

    A disconnected or improperly routed wiring harness can cut power or signal to one or both optics boards. Inspect all connectors at both boards for secure seating and correct routing.

  4. 04

    Defective receiver optics board

    Part replacement

    Even if the transmitter LED is functioning, a failed receiver board will not detect the signal and will report no light. Because the boards are paired, a fault on either side produces the same symptom.

  5. 05

    Both optics boards defective

    Part replacement

    In some cases both boards have degraded simultaneously, especially on older units or after a power surge. Replacing both boards as a set is the recommended resolution when a power reset does not restore normal operation.

See the test procedure for each cause

Frequently asked questions about No light

What does No light mean on a Whirlpool ice_maker?
The No light condition means the ice maker's optical sensor system is not detecting an LED signal between its transmitter and receiver boards. This system is responsible for monitoring the ice level in the bin and coordinating the harvest cycle. The fault can result from a temporary self-check state, a wiring issue, a failed LED, or defective optics boards. If a 5-second power reset does not resolve it, one or both optics boards likely need replacement.
Will resetting the Whirlpool ice maker clear the No light error?
A reset can clear the No light condition if it was caused by a self-check in progress or an active harvest mode temporarily suppressing the LED. To reset, unplug the refrigerator for at least 5 seconds, then restore power and run the test again. If the no-light reading returns after the reset, the cause is a hardware fault such as a defective LED or optics board that a reset will not fix.
How do I fix the No light error on my Whirlpool ice maker?
Start by unplugging the refrigerator for 5 seconds to clear any temporary self-check or harvest mode state, then retest the ice maker. If the error persists, inspect the wiring harnesses connected to both optics boards for loose or incorrectly seated connectors. If wiring is intact and the error remains, replace both optics boards as a set, since the transmitter and receiver work as a calibrated pair and a fault on either board produces the same no-light symptom.
Is it safe to use my refrigerator while the Whirlpool ice maker shows No light?
The refrigerator's cooling and food preservation functions are separate from the ice maker optics system, so your food will remain safe. However, the ice maker itself may stop producing ice or cycle incorrectly while this fault is active. It is fine to continue using the refrigerator, but the ice maker should be diagnosed and repaired to restore normal ice production.
How much does it cost to repair a Whirlpool ice maker No light error?
If the issue is simply a loose wire or a temporary mode state, there may be no parts cost at all. Replacement optics boards, when required, typically range from roughly $30 to $80 per board depending on the specific model, and both boards are usually replaced together. Adding professional labor, total repair costs commonly fall in the range of $100 to $250, though this varies by location and service provider.

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