F19 Serious Moderate DIY

LG Washer F19 — Drying heater / fan fault (washer-dryer combos)

LG Washer · Error code F19

What F19 Means

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.

Symptoms

  • F19 on the display
  • Wash cycles complete, dry cycle errors out
  • Clothes still damp after dry cycle
  • Long dry times before failing

Common Causes

1
Blocked condenser / lint filter

Combo units use a condenser that fouls with lint; no airflow = no drying = fault.

2
Failed drying heating element

Open element doesn't heat — board faults after the temp doesn't rise.

3
Failed dry fan motor

No airflow over the heater — overheats and trips thermostat.

4
Failed dry thermistor

Wrong temp feedback to the board.

5
Tripped thermal fuse or thermostat

Safety device opened from over-temp; usually means root cause is airflow.

How to Fix It

  1. Pull the washer out and inspect the back; ensure adequate clearance for cooling water flow (combo units use cold water condensing).
  2. Open the condenser/lint area per your manual and rinse out built-up lint and detergent residue.
  3. Confirm cold water supply valve is fully on — combos need it during dry.
  4. Run a fresh dry-only cycle with a small load to test.
  5. If F19 returns, unplug and pull the rear panel to access the heater duct.
  6. Test the drying heater for continuity (~10-25 Ω typical) and the dry thermistor.
  7. Inspect the fan motor — should spin freely by hand.
  8. Drying-system diagnosis on combo units is involved; if airflow/condenser cleaning doesn't fix it, call for service.

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.

Common replacement Drying heater assembly View on Amazon→ Common replacement Dry fan motor View on Amazon→

More LG Washer Codes

AE AE — Leak / auto shut-off (base pan water detected) CE CE — Overcurrent Error CL CL — Child Lock Is On dE dE / dE1 / dE2 Error — Door Will Not Lock dE1 dE1 — Door not fully closed dE2 dE2 — Door closed but won't lock

All LG codes → All washer codes →

Verified against manufacturer documentation: lg.com

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician.