Error Code AL2

Error Code AL2 in Your Dishwasher (AEG, Electrolux, Quelle-Privileg)

Has your dishwasher displayed the error code AL2? This code typically indicates a fundamental fault within the heating and temperature monitoring system of your appliance. Specifically, the AL2 error points to an issue with the Negative Temperature Coefficient (NTC) sensor. The NTC sensor is a critical component that plays a vital role in regulating and ensuring the correct water temperature throughout the various stages of a wash cycle. By accurately measuring the water temperature, it allows the dishwasher’s control board to optimize washing performance, ensure effective sanitization, and maintain safe operating conditions.

The AL2 error can be triggered by several related issues stemming from the NTC sensor or its associated electrical pathways:

• Defective Sensor: The NTC temperature sensor itself may have malfunctioned or failed electrically. This means it is no longer capable of accurately measuring the water temperature or is not sending reliable data to the main control board. A faulty sensor can lead to incorrect temperature readings, impacting wash performance and potentially triggering error codes.

• Circuit Interruption: Problems within the electrical circuit connected to the NTC sensor can also cause the AL2 error. This includes an electrical discontinuity, which can manifest as a loose connection at the sensor or control board, or a complete break in the wiring harness (an open circuit). Such interruptions prevent the sensor’s signal from reaching the control module, leading to an error being registered.

• Extreme Cold: In certain environmental conditions, the AL2 error can appear if the ambient temperature surrounding the dishwasher drops significantly. The NTC sensor may register extremely low internal temperatures, below the operational threshold set by the appliance’s programming. Specifically, if the temperature within the dishwasher or its immediate environment drops below -5°C (23°F), the control board may interpret this as a fault condition and display the AL2 error code. This is a protective measure to prevent damage or improper operation in sub-zero conditions.

What to do:

• Check the temperature: Your first step should be to assess the ambient temperature where the dishwasher is located. If your dishwasher is situated in an unheated or poorly insulated space, such as a garage, basement utility room, or an outbuilding, the surrounding air temperature might be the culprit. It is crucial to ensure that the room where the dishwasher is installed is adequately heated and that the temperature consistently remains above the critical threshold of -5°C (23°F). Sustained exposure to freezing or near-freezing temperatures can prevent the NTC sensor from functioning correctly and can lead to the AL2 code being displayed. Allow the ambient temperature to stabilize and rise to a safe operating level before attempting to operate the dishwasher again. This may involve increasing the heating in the room or waiting for warmer weather.

• Turn the dishwasher off and on again: A common and often effective troubleshooting step for many electronic appliance errors is to perform a power cycle. This process can help clear temporary glitches, reset communication errors between components, or reset the control module. To perform a power cycle:

  1. Turn the dishwasher completely off using the main power button on the control panel.
  2. Wait for at least 30 seconds to allow all residual power to dissipate.
  3. Turn the unit back on using the power button. Alternatively, for a more thorough reset:
  4. Unplug the dishwasher directly from the wall power socket.
  5. Or, if you are comfortable and knowledgeable, switch off the dedicated circuit breaker that supplies power to the dishwasher.
  6. Leave the appliance disconnected from power for 1 to 2 minutes.
  7. Restore power by plugging it back in or switching the circuit breaker back on. After completing the power cycle, try initiating a short wash cycle or a rinse program to determine if the AL2 error has been successfully cleared and if the dishwasher is functioning normally.

• Contact a service technician: If, after performing the recommended checks and the power cycle, the error code AL2 continues to appear immediately upon startup or reoccurs during the next wash cycle, it strongly indicates a more serious and persistent fault. This type of issue typically requires physical intervention and diagnosis of the appliance’s internal electrical system. In such cases, it is essential to have a qualified service technician investigate the problem. They will be able to accurately diagnose whether the fault lies with a broken wire, a faulty connection within the wiring harness, or if the NTC temperature sensor itself needs to be replaced. Due to the nature of working with internal electrical components, this type of repair should only be undertaken by a professional with the appropriate training and tools to ensure safety and correct repair. To initiate service, please contact the official customer service department for your appliance brand (AEG, Electrolux, or Quelle-Privileg) or schedule an appointment with an authorized repair technician in your geographic area. When contacting them, be prepared to provide the specific error code (AL2) and the complete model number of your dishwasher, which is usually found on a label inside the door frame or on the back of the appliance.