LG · Refrigerator Moderate

Er HS — Humidity sensor malfunction

The humidity sensor (used on models with controlled-humidity drawers / anti-condensation heater logic) is open, shorted, or unplugged.

Keep using it?
Yes, with caution
DIY difficulty
Moderate
Verified against
lg.com ↗

How to fix it

  1. Unplug for 5 minutes to attempt a soft reset.
  2. If code returns, locate the humidity sensor per the service manual (often near the dispenser or above the door).
  3. Reseat the plug at the sensor.
  4. Replace sensor if reseating doesn't fix it.
  5. If issue persists with a new sensor, replace the main board.

Why it happens

Typical signs: Er HS on display · Crisper drawer condensation issues · Anti-sweat heater may run constantly · Cooling otherwise normal

  • Disconnected sensor Plug unseated after service.
  • Failed humidity sensor Internal element failed.
  • Wiring damage Harness pinched at a hinge.
  • Main control board input Rare ADC channel failure.

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 refrigerator codes

22 22 — Compressor relay / inverter control fault 33 33 — Compressor / defrost test fault 67 67 — Door open / not fully closed 88 88 — Power-on display test (not a fault) Er CF Er CF — Condenser fan motor feedback fault Er CO Er CO — Communication error (main board ↔ display)

All LG codes → All refrigerator 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.