LG · Oven Minor

PF — Power failure / power was interrupted

The oven detected that incoming power was interrupted while it was running or holding a clock. Not a hardware fault by itself — it is an alert that you need to reset the clock and verify any in-progress cycle.

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

How to fix it

  1. Press CLEAR/OFF or Start to dismiss the PF alert.
  2. Reset the clock; restart any cooking cycle that was interrupted.
  3. If PF returns repeatedly with no obvious outage, check the breaker for a loose lug or weak handle.
  4. Verify the range terminal block lugs are torqued and not discolored.
  5. Persistent PF on a known-good circuit suggests a failing main control board.

Why it happens

Typical signs: PF blinking on the display · Clock flashing 12:00 or blank · In-progress timed bake/clean was canceled

  • Brief utility outage or brownout Power dropped long enough for the control to lose state.
  • Tripped or reset breaker Breaker was cycled at the panel.
  • GFCI/AFCI on the circuit tripped Outlet or breaker tripped from a transient.
  • Loose service connection at the range terminal block Intermittent contact mimics a power loss.

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.