Question about Panasonic NE1054F - Pro Microwave Oven, 10 Keypad, 6 Power Levels, 100

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Lead pops off thermal fuse on my panasonic ne1054f

My microwave would start and then shut off. I tried this a couple of times and then it just stopped all together. When I took the cover off I noticed that one of the lead wires that connects to the thermal fuse (?) that's screwed on top of the magnatron was not connected. It was blackened and looked like it had sparked. I tested the fuse and it tested fine. I tried to solder the metal plate back onto the fuse - once I had it secured, I retested the fuse, it was still fine. I hooked up the wires....turned on the unit for 10 seconds and it seemed fine. No sparks, etc. I tried it again for 20 seconds and while it was running, it melted the solder loose and the plate popped off. What would cause this? Thanks in advance for any assistance you can give!

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The thermostat and the terminal on the wire must be replaced.

When a terminal is overheated (usually due to excessive current or heat due to a loose connection) the physical characteristics of the metal change, and they will never be the same.

You should also cut back the lead wire an inch or so until you get a bright shiny copper color, making sure you have cut away all the dull pinkish wire.

A similar service manual can be found here, and it should be close enough to help you.

You can order Panasonic parts from Encompass here.

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

Posted on Dec 01, 2012

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Posted on Jan 02, 2017

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SOURCE: Microwave shuts off after 3 seconds

Although your model number doesn't seem to show up, the NNS950-series units are powered by an high-voltage inverter. And yours has failed. While an inverter (switched-mode power supply) is more efficient from a power consumption standpoint, it is more complex, thus more statistically prone to fail. These should only be examined and worked on by someone who has the necessary technical qualifications. Seriously. Often the machine-soldered connections in a microwave inverter are too weak, so they eventually fail, especially if heat is high in the area. They sometimes fail catastrophically. When not catastrophically damaged, you may hear clicking or squealing and may smell an electrical odor, which is sometimes obscured by the cooling fan. Sometimes a whole new inverter is cheaper than the time and labor required to fix the old one. If a technician is willing and able to troubleshoot and repair the inverter to component level, it will may be expensive, but may be worth it, especially if he or she will resolder and reinforce connections as needed as part of a thorough repair. That could easily make your inverter beter than a new one! You might be able to get some verbal estimates if you call Panasonic-authorized appliance / microwave repair shops and ask then specifically about inverter component-level repair and simple inverter replacement costs for your exact model number.

Posted on Dec 28, 2006

  • 9047 Answers

SOURCE: White Panasonic

In most cases, this is a problem with the inverter or a bad magnetron.

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

I would recommend that you contact your nearest Panasonic-authorized servicer. You can find one here:

Posted on Nov 18, 2007

  • 234 Answers

SOURCE: 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.

Posted on Mar 14, 2009

  • 17129 Answers

SOURCE: Hi, I have a 1200W 44 litre Panasonic Microwave

It seems to me that the magnetron has burnt and failed. So if there is no heating please do not switch on unless you have confirmed the fault. It is possible that the Magnetron is faulty, the temperature cut off is faulty or the main capacitor is short. It is also quite possible that insect can get into the oven and create soft spots. When you switch on these will create a short and make the voltage jump and in the long run damage the magnetron.
So Remove cover after disconnecting , check for dirt/moisture in the cabin, if so wipe clean and dry, check the magnetron and area clean and use an jet air to clean off. If there is soft spots on the magnetron and visible damage seen on the magnetron then it has failed. Finally after drying and a full clean up ,
keeping clear of the microwave, switch on, use a cup of water inside to test.
If you notice any sparks shut off as the magnetron is faulty. replace with same type.

Posted on Apr 11, 2011

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