LG · Oven Minor

5b — Sabbath Mode active (not a fault)

Not an error code. '5b' (sometimes shown as Sb) on an LG oven display indicates Sabbath Mode is engaged: the oven runs at a fixed setpoint with display, lights, and audible tones disabled per Sabbath observance rules.

Keep using it?
Yes — fix when convenient
DIY difficulty
Easy
Verified against
lg.com ↗

How to fix it

  1. Consult the owner manual for your specific LG range — the exit sequence varies (often hold Clock + a number key for ~3 seconds).
  2. On many LG models: hold the Clock pad until you hear a beep and 'SAb' or '5b' clears.
  3. If hold-to-exit does not work, turn the breaker off for 60 seconds; Sabbath Mode does NOT survive a full power loss on most LG models.
  4. Confirm normal display returns and reset the clock.

Why it happens

Typical signs: 5b or Sb shown on the display · Display does not change with normal button presses · Tones suppressed · Convection fan may not modulate

  • Sabbath Mode was activated by holding the right buttons Owner or family member entered the mode intentionally or by accident.

More LG oven codes

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 F10 Range F10 — Door Locking System Failure

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: lg.com.