Microwave Low Severity
PF Appliance Error Code

Whirlpool Microwave PF Error: Power failure/outage

If you are dealing with a whirlpool microwave pf error, this guide will help you understand the cause and find the right solution quickly. What Does Microwave Error Code PF Mean? The PF code on Whirlpool WMH, WMC, and WML series microwaves stands for Power Failure. Unlike most error codes, PF is an informational notification […]

By Denys Mitchell Lead Appliance Repair Specialist

Some Steps

DIY Fixable

from $140

Typical Repair Cost

1-2 hours

Pro Repair Time

Quick Assessment

Answer to continue safely

Is it safe to keep using?

Yes. PF is an informational notification — once cleared, the microwave is fully operational. If PF appeared while food was cooking, check whether the food needs to be recooked before consuming.

Can I reset the code?

Yes. PF clears immediately by pressing the Cancel button or by entering the clock time. No power cycle is required — PF is not a fault condition and does not require a board reset.

When to stop immediately?

Stop if you notice: Stop using the microwave and call a professional if PF appears alongside other fault codes (F1, F7, etc.) after a power event — a surge may have damaged the control board., Stop using the microwave if the power cord on a WMC model shows signs of heat damage, discoloration, or a burning smell at the plug — replace the cord before further use..

Symptoms You May Notice

Clock display is blank or shows "PF" after a power interruption

The microwave has lost its clock time and any cook program in progress due to the power interruption — PF signals this condition and prompts the user to re-enter the clock.

Food left in the microwave is not cooked

If food was inside during the power interruption, the cook cycle did not complete — the user must manually assess the food and re-enter a cook time if needed.

PF appears repeatedly without any apparent household power outage

Repeated PF codes point to brief voltage dropouts from a loose outlet connection, a marginal circuit breaker, or a tripping GFCI outlet that resets quickly without the user noticing.

All other microwave functions work normally after clearing PF

Pressing Cancel or entering the clock time dismisses PF completely and restores full normal operation — confirming PF is informational rather than a hardware fault.

Possible Causes

1

Household power outage

A grid outage or a tripped home circuit breaker interrupts power to the microwave, causing the control board to display PF when power is restored.

DIY Possible
2

Loose power cord or outlet connection

An intermittently loose plug connection on a WMC countertop model causes momentary power loss that registers as PF each time contact breaks and restores.

DIY Possible
3

Tripping GFCI outlet

A GFCI outlet on the microwave circuit that trips spontaneously (due to moisture, aging, or overload) and quickly resets will cause unexplained PF codes with no visible outage.

DIY Possible

Safe Checks You Can Do

These checks are safe for homeowners. No disassembly required. Do not remove panels or access internal components.
  1. 1

    Clear the PF code and reset the clock

    Press the Cancel or Stop/Clear button once to dismiss the PF notification. Then press the Clock button and enter the current time using the number pad to restore normal operation.

    On some WMH models, entering the clock time automatically clears PF without needing to press Cancel first.

  2. 2

    Check for a tripped GFCI or circuit breaker

    If no household power outage occurred, check the kitchen circuit breaker in your electrical panel to ensure it is fully in the ON position. Also check any GFCI outlets on the kitchen circuit — the microwave outlet may be downstream of a GFCI in a different location (often under the sink or at a countertop outlet).

    Press the RESET button on any GFCI outlet that has tripped. If the GFCI trips repeatedly, an electrician should inspect the circuit for moisture intrusion or wiring faults.

  3. 3

    Secure the power cord connection (countertop models)

    For WMC countertop models, unplug the power cord and re-insert it firmly into the wall outlet, ensuring the plug is fully and evenly seated with no visible gap. Avoid loose or worn outlets.

    If the outlet feels loose when you insert the plug, the outlet contacts are worn and should be replaced by an electrician to prevent repeated PF codes and potential arcing.

When to Call a Professional

Contact a qualified technician if:

  • PF appears more than twice a week with no known household outages — circuit wiring or GFCI inspection needed.
  • PF appears together with other F-series fault codes after a storm or power surge — control board surge damage assessment required.

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