PF Minor Easy DIY

LG Dishwasher PF — Power failure flag

LG Dishwasher · Error code PF

What PF Means

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.

Symptoms

  • PF on display after a brief outage
  • Cycle paused mid-program
  • Display blinking on restoration of power

Common Causes

1
Brief utility outage

Brown-out, surge, or short blip from the grid.

2
Tripped breaker

Shared circuit trips and resets; PF logs the event.

3
GFCI nuisance trip

Garbage disposer or sink GFCI shared with the dishwasher tripped.

4
Loose power-cord connection

Cord at the junction box or outlet not fully seated.

5
Extension cord usage

Use of an extension cord or undersized circuit produces voltage drops.

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.

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.

Common replacement LG dishwasher main control board View on 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 →

Verified against manufacturer documentation: lg.com

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician.