LG Dishwasher FE Error Code Explained: Meaning, Causes & Fixes

 
Definition of the FE Error Code
 

The FE error code on an LG dishwasher is a diagnostic message that specifically indicates an issue related to the water fill process. It is generated when the dishwasher’s internal monitoring system detects that the water entering the appliance does not meet the expected parameters for proper operation.

• The FE code relates to water levels: It signifies that the water entering the dishwasher is either insufficient or not delivered in the expected manner during the fill cycle.
• Sensor and timing alert: The system uses sensors and timing mechanisms to verify that the water fills correctly before a cycle begins. When the water take-up deviates from the set standards, this error code is activated.
• Internal diagnostic flag: The error is internally flagged to help identify that there is a discrepancy in the fill process, alerting users to a condition that falls outside normal operating parameters.

In essence, the FE error code is an alert from the dishwasher’s control board, signaling that the water fill cycle did not progress as intended under its regular operational guidelines.

 
Potential Component Malfunctions
 
There are several underlying issues that could be triggering an FE error that are related to problems with individual components within the dishwasher. These components include the water inlet valve, water level sensor, and float switch. Over time, these elements can begin to malfunction even if they appear physically intact. Age-related wear or manufacturing defects within the sensors or the valve mechanism can cause them to misread the water level. Electrical connections may deteriorate or become loose, resulting in inconsistent or erratic signals being sent to the control board.

• Faulty water inlet valve components might allow excessive or insufficient water flow.
• Water level sensors may become contaminated by mineral buildup, affecting readings.
• The float switch mechanism might stick or fail to move freely, triggering erroneous signals.

 
Issues with Water Supply Infrastructure
 
External problems related to the water supply itself can indirectly induce an FE error condition. Even if the internal components of the dishwasher are functioning correctly, variations in water pressure or quality can result in water not reaching the desired levels. If the inlet hose or connectors become damaged, kinked, or clogged by debris, the right amount of water may not be delivered to the system. Similarly, poorly maintained water filters on the supply might get blocked, reducing water flow and impacting sensor feedback.

• Clogged hoses or improperly seated connections may restrict water availability.
• Irregular water pressure due to municipal supply issues can affect water fill consistency.
• Contaminants present in the water can lead to blockages or buildup within key components.

 
Electrical System and Control Board Considerations
 
The integrated electrical system that monitors the water level is central to the operation of the dishwasher. Errors in this system may stem from wiring issues, such as damaged cables or poor connections between the water level sensor, float switch, and the control board. Additionally, the control board itself might be susceptible to faults that prevent it from accurately processing signals from sensors. Intermittent faults in the circuitry can create situations where the FE error is displayed even if the water fill mechanism is mechanically sound.

• Loose or corroded wiring could interfere with the signals from the sensors.
• Intermittent control board failures can misinterpret the water level inputs.
• Electrical surges or improper voltage regulation might disrupt normal sensor operation.

 
Internal Obstructions and Contamination Concerns
 
Another potential cause to consider is the presence of obstructions or contamination within the internal water circulation system. Debris, mineral buildup, or even residual detergent can accumulate and interfere with sensor functions or the proper movement of the float. Such obstructions can mimic or create conditions that lead to an FE error being recorded. Routine cleaning and maintenance are crucial to prevent these build-ups, although sometimes a more significant internal blockage might require professional inspection.

• Buildup around the sensor or float area might hinder its ability to move freely.
• Internal obstructions in water conduits can alter the expected water levels.
• Contamination from detergent residues could form deposits on critical sensor surfaces.