F03Warning
LG Dryer F03 Error Code
The moisture sensor (two metal strips) in the drum is not detecting wetness properly, leading to drying issues.
Common causes
- Dirty or coated moisture sensor bars
- Faulty sensor harness
- Control board error
How to fix it
- Clean the moisture sensor bars with a fine abrasive pad (e.g., Scotch-Brite) to remove residue.
- Check the sensor wiring for breaks or loose connections at the sensor and board.
- If cleaning fails, test the sensor continuity; replace if open or shorted.
⚠ When to call a pro: Call a technician if cleaning and checking wires do not resolve the error.
Part links are affiliate links — as an Amazon Associate we may earn a small commission at no extra cost to you.
Always unplug the appliance (and turn off the water for washers/dishwashers) before inspecting. These guides are for information only and are not a substitute for a professional repair.