Question about Panasonic NN-C994S Convection/Microwave Oven

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NO power display dimesnion 4 range national microwave NNC 2000P MODEL

All of a sudden when I started my microwave oven .I found no power indicator in display and nothing is there.On checking power side I found everything ok and also there is voltage coming . so I switch off after opening cover for inspection I cannot find any burning component , all is brand new condition, oven is 4 yrs old and sparingly used; ONly after I switch off supply from socket .I notice there is back voltage at terminal of plug top indicating some built up charge when the oven was connected and same appeared back after switching off (this is mentioned just to indicate for some clue in locating fault)

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Re: NO power display dimesnion 4 range national microwave...

On front panel there is alow voltage transformmer the primary side isopen circuit replace

Posted on Mar 20, 2007

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Need user manual for National model no: NN-8655 Microwave oven user manual...

I would suggest that contact the dealer from whom you purchased the oven or call any number listed on the model tag of the oven.

Jan 06, 2014 | Panasonic Microwave Ovens

1 Answer

How do i fix a whirlpool microwave and range hood combo

869a8192-23d2-4ffd-9f6d-9d352dca9204.pngWhat is the model number? F-6 is a Microwave Relay Failure.
1. Check wiring to Relay 4903 for short circuits.
2. If wiring is OK:
• Unplug microwave oven or disconnect power.
• Replace electronic control.
• Plug in microwave oven or reconnect power.
Sea Breeze

Jul 25, 2013 | Microwave Ovens

1 Answer

I have GE Profile microwave model PVM1870SM1SS and last week while running, suddently it shut off. There is no power, display buttons and stopped running. Please advise.

From the description a major part has failed, the magnetron is suspect because it suddenly shut down in cycle, if the unit is less than 7 years old it probably has a inverter board and tends to fail, also there is the possibility the keypad control board has stopped working. The microwave in my opinion is worth getting checked out and repaired, but it will be expensive.

Apr 03, 2012 | GE Profile Spacemaker 1.8 Cu. Ft....

2 Answers

I have a whirlpool microwave oven over the range. Model GH 5184xps-4 when I press start, it comes on for one second then it shows a code -F7- and stops


The microwave oven may be provided with a self diagnostic routine that can be operated

through the touch pad keyboard. To enter the self-diagnostic routine:

1.While pressing the CANCEL keypad:
a) Open the oven door.
b) Unplug the microwave oven for 2-seconds and plug it back in.
c) Release the CANCEL keypad and close the oven door. You will see the following display.

NOTE: The humidity sensor test results will appear on the display after 8-seconds.If the tests are successful, "OK " will be displayed. If one or more of the tests fail, "ERR " will be displayed.. 2.When a keypad is pressed, a number according to the test chart will be displayed. When no keypad is pressed, a blank "O" (square) is displayed...

Power Failure: After a power failure, the WELCOME screen will be displayed.

F2 Keyboard Failure: Refer to the Tech Sheet and conduct a touch panel continuity test.

F3 Humidity Sensor Failure: Refer to the Tech Sheet and test the sensor.

F6 Microwave Relay Failure: Check the microwave relay.

F7 Microcomputer Board Failure: Change the microcomputer board.

Hope helps.

Apr 12, 2011 | Whirlpool Microwave Ovens

2 Answers

No power in the microwave but there is electricity at the wallplug

No power and or NO lights at all,indicate a blown fuse.
Locate and replace the fuse inside the unit.

Feb 25, 2011 | Maytag Appliances Over-the-Range Microwave...

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Kenmore Gas Range model # 362.75491990 F3 error Oven will not hold temp - error message displays and beeps I Replaced the oven temp sensor same issue Is the control panel bad?


Many models of the GE microwave have sensors that can detect humidity from the foods you are cooking. This allows the microwave to make adjustments to the power levels used to cook your food. If "Sensor Error" appears, you should either press "Clear" to cancel the mode or leave the food in the appliance longer to give the microwave more time to detect the food.

Press "Time Cook" to manually enter the time if you receive an error message when trying to use the "Sensor Reheat" mode of your GE microwave. The error message may be caused by the food item being too large or too small to detect.

these are some other code error that will help you in case of next time.

  1. Step 1 Press "Off/Cancel" (or "Cancel/Off" depending on your model) to clear the error code. Note the code if it reappears.
  2. Step 2 Replace the touchpad if the code displayed is "F0," "F7" or "F10." A function key is stuck or shorted.
  3. Step 3 Replace the touchpad or the clock (ERC) if the code "F1" is displayed. Disconnect the ribbon connector to the touchpad. If no code is displayed after an hour, replace the touchpad. If the code displays again, replace the clock.
  4. Step 4 Replace the oven temperature sensor if "F2," "F3" or "F4" is displayed. "F2" indicates the oven temperature is too hot and the oven temperature sensor is suspect. "F3" or "F4" indicates the oven temperature sensor or shorted or open.
  5. Step 5 Replace the ERC if "F5," F6" or "F8" is displayed. The ERC is the main control unit. "F5," F6" and "F8 are codes that indicate problems in the ERC functions.
  6. Step 6 Inspect the door-lock assembly and circuit if "F9" is displayed. The door must lock when the oven is in use. If the lock mechanism is not functioning or if the detection circuit is malfunctioning, the stove will display "F9."

jQuery('.article ol .image').each(function(i,e){ var $this = jQuery(this); $this.find('img').error(function(){ jQuery(this).remove(); $this.remove(); }); }); NOTE:

"F3" codes mean your oven temperature sensor has failed or shorted out. The only thing you can do is to replace the sensor.

Take care.

May 11, 2010 | Microwave Ovens

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New maytag power shuts off and comes back in half hour

Depending on the model you may need a 15 or even up to a 20 amp circuit to operate the microwave. Check the installation instructions to be sure. What is most likely happening is the circuit in your home is not powerful enough to run the load of the microwave oven. If this is the case it could be dangerous. I would strongly recommend you have an expert examine the house wiring prior to starting the unit again.

Apr 20, 2010 | Maytag MMV4205 Microwave Oven

2 Answers


There is something on the secondary side which is drawing too much current. I would check all electrolytic capacitors, zener diodes, transistors, and voltage regulators.

Mar 27, 2007 | Panasonic NN-C994S Convection/Microwave...

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