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Fuse blown,door switch shorted

Panasonic Microwave
fuse blown,door switch shorted

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You need to readjust the"Interlock" switch position on the door, they are made to blow the fuse purposely when the door is mis-adjusted for safety, you will need to unplug the unit and disconnect the "interlock" safety switch, then readjust and close the door,until you can get the switch adjusted so it doesn't show a short circuit on the meter,then this should stop the fuse blowing issue for you

Posted on Nov 17, 2009

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2 Answers

Why won't my panasonic inverter microwave will not turn on?


check when the fuse is blown,means inverter unit is faulty

Aug 05, 2014 | Panasonic NN-S251 Microwave Oven

1 Answer

Panasonic microwave will not power on


follow this steps and fix it. God bless you
  1. Inspect the power cord Unplug the power cord and check for voltage at the outlet. Also inspect for damage, shorts, or burn marks that can be a possible safety hazard.
  2. Bad door switch If your microwave does not work at all and you know everything is plugged in properly and the outlet is functioning, then also check the door hooks and the door release button. Using a volt-ohm meter on RX1, check your terminals. When your microwave door is closed you should have a reading of zero. Once the door is open the reading should change to infinity. If these readings do not match up, replacement of the door switch is necessary.
  3. Blown fuses To determine if your fuse has blown out, which may attribute to your microwave not running, you need to pull the fuse out using a pair of fuse pullers. Lay it down and using a volt-ohm meter on RX1, check both ends of the fuse in question. If you do not get a reading of zero, then you will need to replace the fuse.
  4. Bad fan motor Locate the fan and remove the leads. Again using the volt-ohm meter on RX1, check the terminals. If an infinity reading is displayed, it means that the fan has gone bad and requires replacement.

Nov 27, 2013 | Panasonic Microwave Ovens

1 Answer

Panasonic invertor slimline combi


The main fuse in the microwave oven has blown, usually caused by one or two defective door switches.

Mar 30, 2012 | Panasonic Microwave Ovens

1 Answer

The microwave doesn't work at all. no display, light, anything


Plug a lamp in the wall receptical in place of the microwave oven, if okay! it means the main fuse in the oven has blown. There are a number of reasons why this happens, a bad fuse, door switch that has malfunctioned, "common" cracked high voltage diode, shorted capacitor, and an open magnetron. I suggest a professional.

Mar 09, 2012 | Panasonic Microwave Ovens

1 Answer

Internal ceramic fuse repeatly blown.


If it went dead almost immediately after pressing the Start pad, that's usually a shorted high-voltage capacitor.

If it went dead several seconds after pressing the Start pad, that's usually a failing high-voltage transformer.

If it goes dead or blows the breaker (or GFI) when you plug it in or open or close the door, then there's a problem with a door switch or door switch mount. See: http://www.microwavedisplay.com/doorsw.txt in this case.

If this unit has an inverter some parts are difficult for the average do it yourselfer to replace, such as parts which are spot welded, not using removable connectors.

In such cases, it's best to replace the entire inverter.

Due to the lethal voltages used and produced in inverters, I do not recommend that an inexperienced person work on them.

You can find an authorized Panasonic servicer here.

In Canada, you can find an authorized Panasonic servicer here.

You can find an authorized Panasonic servicer here.

You can order Panasonic parts from
Encompass or by calling 866-779-5835.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Jan 09, 2010 | Panasonic Microwave Ovens

2 Answers

Over the stove microwave just stopped working. Circuit breaker was not tripped.


Sounds like the fuse is blown, you will have take the outer case off to find the fuse and replace it

Sep 07, 2009 | Microwave Ovens

1 Answer

Panasonic NNA554W blows 10a fuse when microwave comes on


Possibly the interlock monitor switch is bad or out of adjustment. This switch is designed to create a short circuit across the power line (and then blow the fuse) if you attempt to defeat the door interlock and operate the oven with the door open. A shorted capacitor or diode could also cause the fuse to blow. Because of lethal voltages inside and the possibility of microwave leakage if repairs aren't done correctly, you are best off leaving microwave service to professionals.

May 15, 2009 | Panasonic NN-SN657SMicrowave Oven

1 Answer

Terminal connector to the door switch overheated & fuse blown


Just cleaning is not enought.The terminal is loose and that isusually the problem most of the time.Replace them with new ones and I think you be happy.

Mar 12, 2009 | Panasonic NN-P794SF Microwave Oven

1 Answer

Blown Fuse


If it went dead almost immediately after pressing the Start pad, that's usually a shorted high-voltage capacitor.

If it went dead a few seconds after pressing the Start pad, that's usually a failing high-voltage transformer.

If it goes dead or blows the breaker when you plug it in or open or close the door, then there's a problem with a door switch or door switch mount.

Apr 01, 2008 | Emerson MW8775W Microwave Oven

3 Answers

No power


The door switches are designed to prevent the unit from running while the door is open. You probably have a blown fuse, and it's a white or dark grey ceramic fuse of 15A or 20A, available from local big box stores or appliance parts stores. The fuse is usually located on the floor of the chassis behind the control panel, or mounted in the same area as the door switches. Also, I'm really curious how the door switch got stuck while cleaning? That sounds scary...

Nov 13, 2006 | Kenmore 62622 Microwave Oven

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