Error codes are the best way to troubleshoot a power issue with a Panasonic microwave. Common error codes that signify power trouble with a Panasonic microwave include the F05 code (represents internal memory failure); F09 (running on the wrong power frequency); and the F81, F82, F83 and F84, which all mean that there's no voltage supply to the oven. If your Panasonic microwave won't turn on, make sure it's plugged into a power outlet. Check that the power outlet is functioning properly by testing something else in it. Set the clock on the Panasonic microwave; sometimes, the clock needs to be set in order for the microwave to work. If the buttons on your Panasonic microwave's touch pad don't respond, make sure the door is completely and securely shut. Open and close the door to "wake up" a hibernating microwave oven. Unplug the microwave, then plug it back in.
Troubleshooting Operational Issues
Common error codes found in Panasonic microwaves that may represent operational issues include F44 (malfunction with the microwave's keypad) and F33 or F34 (excessive heat within the oven). If your Panasonic microwave will operate even when the door is open--which creates a safety issue--its door interlock assembly is likely broken. Bring it to an authorised repair centre. If the microwave starts operating when you shut the door without pressing the "On" button, try unplugging the unit and then plugging it back in. If your Panasonic microwave works but the display is blank, unplug the microwave and then plug it back in. Otherwise, bring it to an authorised service agent.
Troubleshooting Miscellaneous Issues
Some miscellaneous error codes commonly found in Panasonic microwaves include F03/F04 (mismatch between incoming line voltage and the oven's voltage setting) and F86, F87, F88 and F89 (represents shorted contacts within the microwave's boards and power supply). If sparking or arcing occurs when your Panasonic microwave is operating, check inside to make sure there's no exposed metal within the cavity. If possible, remove the ceiling plate and carefully clean any food particles that may be stuck near the antenna. If your Panasonic microwave makes a loud humming noise or generates a bad smell when it operates, clean the interior thoroughly. Make sure no debris are stuck above the ceiling plate and antenna. Otherwise, bring it to an authorised service agent. A Panasonic microwave that doesn't properly or thoroughly heat food requires the attention of a professional repair technician. Never attempt to take apart a Panasonic microwave yourself.