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Error code reference

GE Dishwasher Error Code LIGHT

Water intake fault

GE codesGE dishwasher codes

Water intake fault — less than 80 pulses within 60 seconds, or correct number of pulses not achieved within 255 seconds; program stopped.

First step from the service manual

Check water inlet, flow meter, inlet water valve, and wiring.

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

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What LIGHT means on a GE dishwasher

The LIGHT error code on a GE dishwasher indicates a water intake fault related to the flow meter's pulse count. The control board monitors water entering the tub by counting pulses generated by the flow meter as water passes through it. Two conditions trigger this fault: fewer than 80 pulses are detected within the first 60 seconds of a fill cycle, or the required total pulse count is not reached within 255 seconds. When either condition is met, the control board halts the program entirely to prevent the dishwasher from running without adequate water.

The flow meter is a key component in this diagnostic chain. It uses a spinning impeller and sensor to generate electrical pulses proportional to water volume. If water pressure is insufficient, the inlet valve is restricted or faulty, or the flow meter itself is not functioning correctly, pulse counts will fall short of the required threshold. Wiring faults between the flow meter, inlet valve, and control board can also interrupt the signal or prevent the valve from opening fully.

Diagnostic steps should focus on four areas: the household water supply and shutoff valve position, the inlet water valve screen for debris or sediment buildup, the flow meter for physical damage or electrical failure, and the wiring harness connections along this circuit. Low household water pressure can reduce flow enough to trigger the fault even when all components are functioning normally. A systematic check of each component in sequence will identify whether the fault is mechanical, electrical, or supply-related.

Source: manufacturer service documentation.

Common causes of LIGHT

  1. 01

    Closed or restricted water supply valve

    Wiring / connection

    The shutoff valve under the sink may be partially or fully closed, limiting water flow to the dishwasher. Check that the valve is fully open and that household water pressure is adequate.

  2. 02

    Clogged inlet valve screen

    Wiring / connection

    Sediment or debris can accumulate in the mesh screen inside the inlet water valve, restricting flow enough to drop pulse counts below the required threshold. Inspect and clean the screen, or replace the inlet valve if the screen is damaged.

  3. 03

    Faulty inlet water valve

    Part replacement

    The solenoid-operated inlet valve may not be opening fully or at all due to an electrical or mechanical failure. If cleaning the screen does not restore normal flow, the valve likely needs to be replaced.

  4. 04

    Failed or obstructed flow meter

    Part replacement

    The flow meter's impeller can become jammed with debris or the sensor can fail, causing it to stop generating accurate pulse signals. Inspect the flow meter for physical blockage and test its electrical output.

  5. 05

    Wiring fault in the water intake circuit

    Wiring / connection

    Damaged, loose, or corroded wiring connections between the flow meter, inlet valve, and control board can interrupt signals or prevent the valve from opening. Inspect connectors and harness continuity along this circuit.

See the test procedure for each cause

Frequently asked questions about LIGHT

What does LIGHT mean on a GE dishwasher?
The LIGHT error code on a GE dishwasher signals a water intake fault. The control board detected that the flow meter registered fewer than 80 pulses in the first 60 seconds of filling, or that the total required pulse count was not reached within 255 seconds. The dishwasher stops the program to prevent operating without sufficient water. The fault points to a problem with the water supply, inlet valve, flow meter, or related wiring.
How do I fix the LIGHT error code on my GE dishwasher?
Start by confirming the water supply shutoff valve under the sink is fully open and that household water pressure is normal. Next, inspect the inlet water valve screen for sediment or debris and clean it if necessary. If water supply and the screen are not the issue, test the inlet valve and flow meter for proper operation and check wiring connections throughout the fill circuit. Replacing the faulty component, whether the inlet valve or flow meter, should clear the fault.
Is it safe to keep using my GE dishwasher when the LIGHT error is showing?
The dishwasher stops the cycle automatically when this error occurs, so it will not run a wash without adequate water. It is safe to leave the appliance as-is while you diagnose the issue, but you should not attempt to force a cycle to run without resolving the underlying water intake problem. Running the dishwasher repeatedly without addressing the fault could mask a more serious component failure.
Will resetting my GE dishwasher clear the LIGHT error code?
A reset may clear the displayed error and allow you to attempt a new cycle, but the fault will return if the underlying cause has not been corrected. Because the LIGHT code is triggered by a measurable water intake condition, the control board will detect the same problem again as soon as it attempts to fill. Address the root cause before relying on a reset to restore normal operation.
How much does it cost to repair a GE dishwasher showing the LIGHT error code?
Repair costs vary depending on what component is at fault. If the fix is simply cleaning the inlet valve screen or adjusting the supply valve, there may be no parts cost at all. Replacing an inlet water valve typically costs in the range of $20 to $80 for the part, while a flow meter replacement can range from $30 to $100 or more. Adding professional labor generally brings total repair costs to somewhere between $100 and $250, depending on your location and the technician's rates.

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