LG · Microwave
PO
Power interruption notice (not a fault)
What causes it
The microwave lost and regained power — a brief outage, breaker trip, or loose outlet connection, not a broken part.
What it means in practice
This isn't a fault. It notes that the microwave lost and regained power, such as after an outage or a loose outlet connection.
What to check before calling
- ✓Press Clear/Stop to dismiss it and confirm the microwave still runs a normal cycle.
- ✓Check that the cord is fully seated in the outlet — if PO keeps coming back with steady household power, the microwave's internal power supply likely needs testing.
- ✓Press Stop/Clear to dismiss the message.
- ✓Check that the plug is fully seated.
When to call a technician
If PO appears without outages, check the outlet and breaker.
If those checks don't clear the PO code, it's usually a sign of a failed part rather than something to keep resetting. A technician runs a full diagnostic on your microwave, confirms the cause, and quotes the repair before any work starts. The $89 service call is waived if you go ahead with the repair, and parts and labor are covered by our 90-day warranty on parts & labor.
Common question
Is PO an error?
No. It's a power-interruption notice, not a broken part.
Still showing PO?
Same-day diagnosis and repair across Las Vegas, Henderson, and Summerlin. $89 service call, waived with repair.
Other Microwave Error Codes
Not seeing PO, or want to compare it against a different code on the display? Here's what these other common microwave codes mean.