LG · Oven Serious

F16 — Lower oven over-temperature / sensor issue

The lower-oven temperature exceeded the safe threshold or the lower sensor reported an impossible value the control treats as overheat. Element is shut down.

Keep using it?
Limited use only
DIY difficulty
Moderate
Verified against
lgparts.com ↗

How to fix it

  1. Let the oven cool fully before any further use.
  2. Press CLEAR/OFF and power-cycle at the breaker for 60 seconds.
  3. If F16 returns, kill the breaker and unplug the lower thermistor; measure resistance — should be ~1080 Ω. Replace if shorted.
  4. Inspect the bake element for visible damage or arcing.
  5. Check that the cooling vents at the rear/top of the range are not blocked by foil, racks, or wall cabinets.
  6. If sensor checks good and overheat repeats, replace the main control board (welded relay).

Why it happens

Typical signs: F16 or F-16 on display · Lower cavity very hot then shuts off · Lower oven will not restart · May trip after long bake or self-clean preheat

  • Welded lower bake-relay contacts Element stayed energized past setpoint.
  • Shorted lower oven thermistor Bad sensor told the board the oven was cold.
  • Failed main control board Logic or relay drive failed.
  • Excessive ambient heat in the control bay Blocked cooling vents allowed the PCB area to overheat.

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 lower oven thermistor Common replacement
    Amazon →
  • LG range main control board 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 — Right-rear cooktop sensor open/short F1 Range F1 — Upper Oven Thermistor Error

All LG codes → All oven 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: lgparts.com.