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Error code reference

GE Dishwasher Error Code Lock LED + continuous beep

Factory test mode calibration failure

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What the Lock LED + continuous beep error code actually means

Your GE dishwasher ran an internal self-check and found that one of its sensors, either the water temperature sensor or the water-clarity sensor, is reading outside the normal range, or there was a problem reading its internal memory. This often happens when the dishwasher is installed in a very cold location or when the water-clarity sensor is dirty. Cleaning the sensor and checking the installation location are the first steps before assuming a part needs to be replaced.

Diagnostic procedure

The full Lock LED + continuous beep procedure

Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.

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1
First diagnostic step
Check if dishwasher is located on a non-insulated outer wall where temperature at the turbidity sensor may be below 42°F; clean the turbidity sensor by running a rinse only cycle with one cup vinegar or citric acid crystals (WD35X151).
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Most common causes of Lock LED + continuous beep

Ranked by how often they cause this code
  1. 1Turbidity sensor fouled with mineral or detergent buildup
  2. 2Ambient temperature below 42°F at sensor location
  3. 3Temperature sensor out of range or faulty
  4. 4Turbidity sensor failure
  5. 5EEPROM read failure on the control board

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Questions people ask about Lock LED + continuous beep

What does Lock LED + continuous beep mean on a GE dishwasher?
This combination signals a factory test mode calibration failure. The control board has detected that the temperature sensor is reading outside the 42°F to 199°F range, the turbidity sensor analog signal is outside its expected window, or the EEPROM data could not be read correctly. The dishwasher activates the Lock LED and continuous beep to flag the fault before normal operation can proceed.
Is it safe to use my GE dishwasher when the Lock LED and beeping are active?
The dishwasher should not be operated normally while this calibration error is active, as the control board cannot confirm that sensors are reading correctly. Running cycles without validated sensor feedback means the machine cannot properly regulate wash intensity or water temperature. Diagnose and resolve the fault before resuming normal use.
How much does it cost to repair the Lock LED + continuous beep error on a GE dishwasher?
Repair costs vary depending on the root cause. Cleaning the turbidity sensor yourself using vinegar or citric acid crystals costs very little. If a sensor needs replacement, parts and labor typically range from around $100 to $250 depending on your location and the specific component. A control board replacement, if required, generally runs higher, often in the $200 to $400 range including labor.
How do I fix the Lock LED + continuous beep error on my GE dishwasher?
Start by checking whether the dishwasher is installed against a cold, non-insulated exterior wall where temperatures near the turbidity sensor could fall below 42°F. If the location is not the issue, run a rinse-only cycle with one cup of vinegar or citric acid crystals (WD35X151) to clean the turbidity sensor. If the error persists after cleaning, the temperature sensor, turbidity sensor, or control board may need to be tested and potentially replaced.
Will resetting my GE dishwasher clear the Lock LED + continuous beep error?
A power reset may temporarily clear the display, but the error will return if the underlying cause, such as a dirty turbidity sensor, a cold installation environment, or a failing component, has not been addressed. Clearing the code without fixing the root cause will result in the fault reappearing during the next diagnostic cycle.

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