If your LG dryer is not sensing moisture correctly, clothes may come out damp or the machine may stop prematurely. This issue often stems from a clogged lint filter, a failing moisture sensor, or incorrect venting that traps humid air. Understanding how the flow sense works is the first step toward restoring efficient, full-cycle drying performance.
Understanding the Flow Sense Mechanism
LG dryers use a combination of moisture sensors and timed drying cycles to determine when clothes are dry. The flow sense function monitors humidity levels inside the drum and adjusts the drying time accordingly. When airflow is restricted or sensors become dirty, the system cannot accurately read moisture, leading to inefficient cycles or error codes.
Common Causes of Flow Sense Issues
Several factors can trigger flow sense problems, ranging from simple maintenance oversights to hardware failures. Identifying the root cause helps you avoid unnecessary repairs and focus on practical solutions. Below are the most frequent contributors to this issue.
Lint Accumulation in the Filter and Duct
Lint buildup is the leading cause of poor airflow in dryers. When the lint filter is clogged or the vent duct is obstructed, moisture cannot escape effectively. This forces the dryer to either overheat or terminate the cycle early, triggering a flow sense alert.
The moisture sensors located near the lint filter measure humidity levels during a cycle. If they are coated with residue from dryer sheets or fabric softener, they provide inaccurate readings. Over time, these sensors can also degrade, requiring cleaning or replacement to restore proper function.
Step-by-Step Troubleshooting Guide
Follow this structured approach to diagnose and resolve flow sense problems. These steps are designed to address both simple and complex issues without requiring advanced technical skills.
Advanced Solutions for Persistent Problems
If basic troubleshooting does not resolve the issue, the problem may lie within the dryer’s control board or sensor wiring. A multimeter can help you test the continuity of the moisture sensor and associated wiring. Loose connections or a failing control board often manifest as recurring flow sense errors despite regular maintenance.
When to Seek Professional Assistance
Some issues, such as a burnt-out sensor or a malfunctioning main board, require specialized tools and expertise. If you see error codes like “dE” or “5E,” or if the dryer stops mid-cycle repeatedly, contacting an authorized LG service center is the most efficient solution. Professional technicians can provide genuine parts and accurate diagnostics that extend the life of your appliance.
