LG · Dishwasher Minor

PF — Power failure flag

PF is not a fault — it notifies you that the dishwasher lost power during a cycle. The cycle resumes or you can restart it once power is stable.

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

How to fix it

  1. Press POWER, then Start/Pause to resume the cycle.
  2. If PF recurs, verify the dishwasher is on its own dedicated 15 A circuit per LG.
  3. Reset the breaker and confirm voltage at the outlet (108–132 VAC).
  4. Do not use an extension cord.
  5. Check the junction box wiring at the dishwasher for loose lugs.
  6. If PF appears repeatedly with no household outage, replace the power filter / EMI module, then the main PCB.

Why it happens

Typical signs: PF on display after a brief outage · Cycle paused mid-program · Display blinking on restoration of power

  • Brief utility outage Brown-out, surge, or short blip from the grid.
  • Tripped breaker Shared circuit trips and resets; PF logs the event.
  • GFCI nuisance trip Garbage disposer or sink GFCI shared with the dishwasher tripped.
  • Loose power-cord connection Cord at the junction box or outlet not fully seated.
  • Extension cord usage Use of an extension cord or undersized circuit produces voltage drops.

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 dishwasher main control board Common replacement
    Amazon →

More LG dishwasher codes

2H 2H — Delay-start indicator (2 hours remaining) AE AE — Leak Detected (Aqua Error) bE bE — Bubble / oversuds error CE CE — Motor / communication error CL CL — Child lock / control lock active CR CR — Test / calibration mode

All LG codes → All dishwasher 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.