LG · Washer Serious
F19 — Drying heater / fan fault (washer-dryer combos)
F19 is specific to LG washer-dryer combo models and indicates the drying subsystem (heater, fan motor, thermistor, or air path) is faulting. The wash side may still work.
- Keep using it?
- Limited use only
- DIY difficulty
- Moderate
- Verified against
- lg.com ↗
How to fix it
- Pull the washer out and inspect the back; ensure adequate clearance for cooling water flow (combo units use cold water condensing).
- Open the condenser/lint area per your manual and rinse out built-up lint and detergent residue.
- Confirm cold water supply valve is fully on — combos need it during dry.
- Run a fresh dry-only cycle with a small load to test.
- If F19 returns, unplug and pull the rear panel to access the heater duct.
- Test the drying heater for continuity (~10-25 Ω typical) and the dry thermistor.
- Inspect the fan motor — should spin freely by hand.
- Drying-system diagnosis on combo units is involved; if airflow/condenser cleaning doesn't fix it, call for service.
Why it happens
Typical signs: F19 on the display · Wash cycles complete, dry cycle errors out · Clothes still damp after dry cycle · Long dry times before failing
- Blocked condenser / lint filter Combo units use a condenser that fouls with lint; no airflow = no drying = fault.
- Failed drying heating element Open element doesn't heat — board faults after the temp doesn't rise.
- Failed dry fan motor No airflow over the heater — overheats and trips thermostat.
- Failed dry thermistor Wrong temp feedback to the board.
- Tripped thermal fuse or thermostat Safety device opened from over-temp; usually means root cause is airflow.
Parts you may need
If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.
More LG washer codes
Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: lg.com.