Freezer Low Severity
PO Appliance Error Code

Maytag Freezer PO Error: Power outage indicator

What Does Maytag Freezer Error Code PO Mean? PO on Maytag MZF upright frost-free freezers means the control detected a power outage during operation. The freezer records the event and flashes PO on the display when power returns so the owner can verify food safety. PO is informational — not a hardware fault. Common Causes […]

Quick Assessment

Answer to continue safely

Is it safe to keep using?

Yes. PO is informational only. Confirm food safety then continue normal use.

Can I reset the code?

Yes. Press and hold the alarm reset button to clear. Code will not recur without another power event.

When to stop immediately?

Stop if you notice: PO persists after reset and no recent outage occurred, Freezer fails to cool back to setpoint within 4 hours.

Symptoms You May Notice

Freezer lost power during operation

Power was interrupted while the freezer was running; the indicator confirms food may have reached unsafe temperatures.

Temperature higher than setpoint at first reading

Cabinet temperature is 10-20°F higher than normal after a long outage.

Audible alarm accompanies the PO display

On alarm-equipped models, an audible beep sounds until acknowledged.

Food items may have thawed

Items near the top of the cabinet may show signs of thawing depending on how long the power was out.

Possible Causes

1

Recent household power outage

Grid event, blown breaker, tripped GFCI, or unplugging.

DIY Possible
2

Loose or damaged power cord

Intermittent connection at outlet or internal cord fray.

DIY Possible
3

Nuisance trip from appliance on shared circuit

Another appliance on the same circuit tripped the breaker briefly.

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

    Acknowledge and clear PO

    Press and hold the Alarm Reset or Set button for 3 seconds per the Maytag MZF owner manual.

    PO is informational — once cleared it will not return until another outage event.

  2. 2

    Check food safety

    Verify food is still below 40°F (ice still present, no thawing). If frozen food has thawed, discard per USDA guidelines.

    Full freezer holds cold ~48 hours; half-full ~24 hours.

When to Call a Professional

Contact a qualified technician if:

  • PO recurs daily with no outages — electrical or control fault
  • Freezer will not return to setpoint after outage
  • Any signs of compressor short-cycling

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HI E2 E1 DF SY EF OP