LG Dryer F3 Error Code: Causes and Fixes
Quick answer: Heating circuit issue
What you’ll notice
Dryer runs but produces no heat, or the heating element shuts off before clothes are dry.
LG
Dryer
Code F3
medium severity
LG models: The lint filter is at the top of the door opening on most LG DLE/DLGX models. LG's FlowSense sensor measures exhaust restriction and contributes to vent alerts. LG TurboSteam models have a water inlet valve; if a water-adjacent fault appears on a vented dryer, check whether the steam line is intact.
Common causes
- Heating element failed (most common on electric dryers)
- High-limit thermostat tripped
- Thermal fuse blown
- Restricted airflow caused an overheat that tripped a safety device
Step-by-step fix
- Check the vent duct first — a F3 caused by restricted airflow will recur if the duct is not cleared.
- Test the heating element for continuity — a broken element reads open.
- Test the high-limit thermostat and thermal fuse.
- Replace whichever component is open.
Tools you may need
MultimeterScrewdriver set
Prevention
- Keep the vent duct clear to prevent overheat conditions that blow fuses.
When to stop DIY
Gas dryer with no heat: call a technician — gas valve and igniter diagnosis is not a safe DIY task for most people.
FAQ
What does F3 mean on LG dryer?
F3 usually indicates: Heating circuit issue.
Can I keep using the appliance with F3?
Use caution. Severity is medium. Gas dryer with no heat: call a technician — gas valve and igniter diagnosis is not a safe DIY task for most people.
How long does this fix usually take?
Typical first-pass troubleshooting takes 30–60 minutes.