Whirlpool TruCool Refrigerator: Troubleshooting the 'PO'... | appliancefaults.com

Technical Background:

The 'PO' error code typically indicates a power interruption or a problem with the power supply to the main control unit (MCU). The MCU relies on stable voltage paths and memory to operate correctly. A power fluctuation can corrupt the stored operating parameters or damage the control board itself. The voltage is monitored through various sensing circuits on the board, and a deviation outside acceptable parameters triggers the error code.

Symptoms:

The Whirlpool TruCool refrigerator display is showing the 'PO' error code after experiencing a power flicker or power outage. The refrigerator may not be cooling properly, or the display may be unresponsive.

Possible Causes:

Power outage or brownout condition
Corrupted data in the main control board
Loose wiring connection to the control board
Defective main control board
Voltage spike damaging components

Solution:

1

Unplug the refrigerator from the wall outlet.
2

Locate the main control board. It is usually behind the refrigerator near the compressor or behind the temperature controls.
3

Inspect the wiring connections to the main control board for any signs of looseness, corrosion, or damage. Re-seat any loose connections.
4

Using a multimeter, check the voltage at the outlet. It should read approximately 120V AC. If the voltage is significantly lower, investigate the power supply to the outlet.
5

Restore power to the refrigerator and observe the display. If the 'PO' code persists, attempt to clear the error code by pressing and holding the reset button (if available) or consult the service manual for specific instructions.
6

If the error code continues after attempting a reset, consider replacing the main control board.
7

After replacing the control board, allow the refrigerator to run for 24 hours and monitor its performance.

Safety Warning:

Always disconnect power to the appliance before performing any repairs. Use Lock Out Tag Out (LOTO) procedures. High voltage components are present. Discharge capacitors before handling the control board.

Prevention:

Install a surge protector to protect the refrigerator from voltage spikes. Ensure the outlet is properly grounded. Avoid overloading the circuit with other appliances.

Expert Tip:

After replacing the control board, run a diagnostic test cycle through the service menu to ensure all components are functioning correctly. Often pressing and holding the freezer temp DOWN and refrigerator temp UP buttons simultaneously for 3 seconds enters the service mode. Consult the service manual for the specific sequence for this model.

Frequently Asked Questions

•Where exactly is the main control board located in my Whirlpool TruCool refrigerator?

The main control board is typically located either behind the refrigerator, near the compressor, often covered by a metal access panel, or behind the temperature control panel inside the refrigerator compartment itself. Refer to your refrigerator's service manual for the exact location and access instructions.

•How do I perform a hard reset on the Whirlpool TruCool refrigerator?

A hard reset typically involves unplugging the refrigerator from the power outlet for at least 5 minutes to allow the capacitors in the control board to fully discharge. Then, plug it back in. This can sometimes clear temporary errors or reset the control board's memory. If a reset button is available, consult the service manual for the correct procedure.

•What is the part number for the main control board on the Whirlpool TruCool?

The part number for the main control board will vary depending on the specific sub-model of your Whirlpool TruCool refrigerator. You can find the correct part number by locating the model number of your refrigerator (usually inside the refrigerator compartment on a sticker) and searching for the parts diagram online or by contacting a parts supplier.

Whirlpool TruCool Refrigerator: Troubleshooting the 'PO' Error After Flicker Reset

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•Where exactly is the main control board located in my Whirlpool TruCool refrigerator?

•How do I perform a hard reset on the Whirlpool TruCool refrigerator?

•What is the part number for the main control board on the Whirlpool TruCool?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: