LG · Oven Moderate

F22 — Steam sensor short

Companion code to F21 — the steam thermistor circuit reads shorted. Steam functions are disabled to prevent uncontrolled steam-generator heating.

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

How to fix it

  1. Power down for 60 seconds and retry.
  2. Disconnect power, unplug the steam thermistor, and measure resistance. Short = replace.
  3. Inspect the harness for melted insulation; replace pigtail if damaged.
  4. Dry any wet connector and verify the steam generator seals are not leaking.
  5. If sensor checks good when isolated but F22 persists, replace the main control board.

Why it happens

Typical signs: F22 or F-22 on display · Steam features unavailable · Code returns immediately after entering a steam cycle

  • Shorted steam thermistor Sensor reads near 0 Ω.
  • Pinched/melted sensor wires Insulation breakdown near the steam generator shorts the pair.
  • Water intrusion into the connector Steam leak wet the harness.
  • Main control board input fault Board reads short with sensor disconnected.

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.

  • LG oven steam sensor Common replacement
    Amazon →

More LG oven codes

5b 5b — Sabbath Mode active (not a fault) CF1 CF1 — Left-front cooktop sensor open/short CF2 CF2 — Left-rear cooktop sensor open/short CF3 CF3 — Right-front cooktop sensor open/short CF4 CF4 — Rear Cooktop Sensor Error (Zone Varies by Model) F1 Range F1 — Upper Oven Thermistor Error

All LG codes → All oven codes →

Frequently asked questions

What does the F22 code mean on a LG oven?

Companion code to F21 — the steam thermistor circuit reads shorted. Steam functions are disabled to prevent uncontrolled steam-generator heating.

What causes the F22 code on a LG oven?

Shorted steam thermistor: Sensor reads near 0 Ω. Pinched/melted sensor wires: Insulation breakdown near the steam generator shorts the pair. Water intrusion into the connector: Steam leak wet the harness.

Is it safe to keep using a LG oven with a F22 error?

Yes, with caution. This is rated a moderate-severity fault.

How do I fix F22 on a LG oven?

Power down for 60 seconds and retry. Disconnect power, unplug the steam thermistor, and measure resistance. Short = replace. Inspect the harness for melted insulation; replace pigtail if damaged.

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.