When I press the clock button, the microwave turns on and starts counting down from 30 seconds. The stop/clear button will not work to stop it. I have to open the door to stop it. I unplug it but it still does the same thing.

It seems like you're experiencing an issue with your Panasonic microwave oven NNT551. If the clock button is not responding and you only see two dots when pressing the stop button, there might be a few things you can try to troubleshoot the problem:

1. Power Cycle the Microwave:
   • Unplug the microwave from the power outlet.
   • Wait for about 30 seconds.
   • Plug it back in and try setting the clock again.
2. Check for Child Lock:
   • Some microwaves have a child lock feature that can prevent certain buttons from functioning. Check your manual to see if your model has this feature and how to disable it.
3. Reset to Default Settings:
   • If there is an option in the manual or settings to reset the microwave to its default settings, try doing that.
4. Inspect for Physical Damage:
   • Ensure there is no physical damage to the control panel or any other part of the microwave that may be affecting its functionality.

yes
just put it in and press the start button
most have a minimum of 30 seconds so when it counts down to 10 stop it and that is 20 seconds
you can reheat just about everything EXCEPT WHEAT BAGS as they accumulate the heat and can catch fire in the unit

Hi,

Here is a tip that will help you to figure out what is wrong with your Microwave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101

Operating functions:
To set the clock, press and hold the clock/timer button for three seconds. A clock icon will appear on the left side of the screen. Input the time using the numerical buttons and then click the clock/timer button to save the time.
To set the timer, press and release the clock/timer button so that the display shows all zeroes. Enter the desired time using the keypad. Press start/stop to start the countdown. The countdown may be paused by pressing the stop/start button and resumed by pressing the same button again.
When countdown is complete, timer will beep continuously for thirty seconds and display will flash. Timer will then beep every ten seconds for ten minutes until the stop/start button is pressed.
This timer will also time up to time activities. To start count up, press clear/memory so timer reads all zeroes. Press stop/start and a plus sign will appear on the right side of the screen as the timer begins counting up.

try unplugging it for about 15 minutes. if that doesnt work, you might as well get a new one. i fix everything myself for just the cost of parts and i have found that what parts cost for a microwaves, its cheaper just to buy a new one.

Press clear/reset button and hold 5 seconds. If this doesn't work unplug unit or shut off breaker for 10 seconds.

I had this problem too:
it turns out that it (apparently) just needed some 'warm-up' time!

After being plugged in for about 15 to 30 minutes,
the buttons suddenly "came to life"...

Note that when it's flashing 88:88 you are supposed to _start_ with the 'Stop/Clear' button. After that, set the clock (press "Clock", enter the time with the number pad, then press Clock again).

Hope that helps.

• Disconnect the power for 30 seconds. After restoring power, do not set the clock.
• If your model has an ON/OFF clock display, you can choose not to have the time displayed. To choose this option, press the 0 pad for about three seconds. To Turn the display back on, press the 0 again.

Touch the clock pad. Enter in the correct time of day by touching the numbers in sequence. Touch the clock pad again.

You need to trace the power feeding the high voltage transfomer. Because the table doesn't turn, it implies that a door switch or safety interlock is the problem.

One of your door interlock switches is defective . I would suggest having it repaired by a qualified repair tech in your area.