Whirlpool PO Error: Power Outage Warning / Temperature Rise
Clear Whirlpool refrigerator PO code (power outage).
Power Outage indicator. The control board was de-energized during an electrical blackout, and internal temperatures rose above 45°F (7°C) in the fresh food section.
Probable Causes
Residential utility power outage or tripped circuit breaker in the basement panel.
Loose wall outlet electrical plug connection or faulty ground fault circuit interrupter (GFCI).
Momentary brownout or power spike resetting the refrigerator digital microprocessor.
Diagnostic & Testing Steps
- •Front control panel chimes 3 times periodically and displays PO code.
- •Display toggles between set temperature and highest temperature reached during outage.
- •Compressor and fans continue running, but alarm chime sounds every few minutes.
Tools & Equipment Required
- ✓Digital Multimeter (AC & DC Voltage Mode)Verify 120V/230V AC wall outlet stability and test 12V / 5V DC rails on control board.
- ✓1/4-inch Nut Driver & Phillips #2Remove rear machine compartment shield or upper control box cover.
- ✓Outlet Circuit Tester (3-Prong)Confirm correct household electrical polarity and solid ground connection.
- ✓FlashlightInspect main PCB power supply capacitors for bulging or scorch marks.
Fast Reset Sequence: Whirlpool Control Diagnostic Reset Sequence
Before unmounting panels or beginning diagnostic procedures, attempt this manufacturer reset to clear transient microcomputer lockouts:
- 1.Press Cancel / Drain twice to terminate the locked cycle.
- 2.Disconnect wall power plug or switch off the dedicated breaker for 5 full minutes.
- 3.For electronic diagnostic test mode: with door latched, press any 3 consecutive keys (1-2-3, 1-2-3, 1-2-3) in sequence under 1 second apart.
- 1
Step 1: Acknowledge and Reset the PO Alarm
[ ] DonePress any button on the dispenser control panel (or press "Filter Reset" for 3 seconds) to dismiss the alert.
Verification:Alarm stops chiming, PO clears from the screen, and standard temperature setpoints display. - 2
Step 2: Inspect Food Temperatures with Probe Thermometer
[ ] DoneMeasure temperature of liquids in the fresh food compartment using an instant-read kitchen thermometer.
Verification:Temperature is below 40°F (4°C); refrigerator cooling system is active and reducing temperatures. - 3
Step 3: Verify Wall Receptacle Voltage and Stability
[ ] DoneTest electrical wall outlet with multimeter in AC Volts mode across hot and neutral slots.
Verification:Reading measures 120 VAC steady with no loose terminal contact or thermal scorching.
Repair Solutions
Press the "Confirm" or "Measured Fill / Water Filter Reset" button on the dispenser panel to acknowledge.
Verify fresh food section cools back down to 37°F (3°C) and freezer to 0°F (-18°C).
Test wall outlet AC voltage with multimeter (must read 115–125 VAC steady).
Frequently Asked Questions
Is the PO code on a Whirlpool refrigerator an equipment defect?
No. The PO code is an informational safety warning alerting homeowners that internal temperatures rose during a power failure.
Why does my Whirlpool refrigerator show PO every week?
Frequent PO alerts indicate an unstable wall receptacle, a loose neutral wire, or an overloaded circuit breaker tripping intermittently.