Whirlpool Refrigerator Error Code PO: Reset After Power... | appliancefaults.com

Technical Background:

The PO error code typically indicates a power outage or power-related issue. The MCU (Main Control Unit) monitors the incoming voltage. During or after a power outage, voltage fluctuations or surges can trigger this code. The MCU's memory can also be corrupted, causing it to falsely display the PO error.

Symptoms:

The refrigerator display is showing a "PO" error code. The refrigerator may not be cooling properly, or it may seem to be functioning normally despite the error code.

Possible Causes:

Power surge during the outage.
Corrupted data in the main control board (MCU).
Low voltage condition after power restoration.
Loose wiring connections at the power supply or MCU.
Defective MCU (Main Control Unit).
Software glitch in the control board.

Solution:

1

Unplug the refrigerator from the wall outlet. This is a hard reset.
2

Wait 5-10 minutes. This allows capacitors in the control board to fully discharge.
3

Plug the refrigerator back into the wall outlet.
4

Observe the display panel. If the PO error code reappears, proceed to the next step.
5

Check the voltage at the outlet with a multimeter. It should read between 110V AC and 120V AC.
6

If the voltage is outside this range, contact an electrician to correct the electrical issue.
7

If the voltage is correct and the PO code persists, the MCU may need replacement or reflashing by a qualified technician.

Safety Warning:

Disconnect power to the refrigerator at the breaker panel before performing any electrical troubleshooting. Use proper Lock-Out/Tag-Out (LOTO) procedures to prevent accidental re-energizing of the circuit. High voltage is present inside the refrigerator; exercise caution.

Prevention:

Install a surge protector on the outlet where the refrigerator is plugged in. Consider a whole-house surge protector at the breaker panel. Regularly inspect the power cord and outlet for damage. Report any flickering lights or other power issues in your home to an electrician.

Expert Tip:

Some Whirlpool refrigerators have a service mode that allows you to clear error codes. Consult the technical service documentation for your specific model. To try a generic reset: press and hold the 'Door Alarm' and 'Light' buttons simultaneously for 3 seconds. This may clear the code if it’s a soft error.

Frequently Asked Questions

•How do I access the service mode on my Whirlpool refrigerator model XYZ123?

The service mode entry varies by model. Consult the technical service manual or a qualified technician for the correct procedure for your specific model.

•Where is the MCU (Main Control Unit) located in my refrigerator?

The MCU is typically located behind the control panel or inside the top of the refrigerator compartment. Disconnecting the power and removing the panel is usually required for access.

•What is the part number for the MCU for my Whirlpool refrigerator?

You will need the full model number of your refrigerator to find the correct part number. You can find it on a sticker typically located inside the refrigerator compartment on the side wall, or sometimes on the door. Once you have the model number, you can search online appliance parts retailers or contact a Whirlpool authorized service center.

Whirlpool Refrigerator Error Code PO: Reset After Power Outage Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I access the service mode on my Whirlpool refrigerator model XYZ123?

•Where is the MCU (Main Control Unit) located in my refrigerator?

•What is the part number for the MCU for my Whirlpool refrigerator?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: