Question about Panasonic Microwave Ovens

1 Answer

In the midst of heating, my microwave went dead. The circuit is OK

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Panasonic Master
  • 8,820 Answers

A microwave can be dead for many reasons.

It may be the fuse, which is usually located behind the grille or on the floor of the oven behind the control panel or between the door switches.

If the fuse is good, it may be an open thermostat or thermal cutout (TCO) / thermal fuse on or near the magnetron or on top of the cavity / body of the oven.

If it goes dead for a while during or after cooking then comes back on, the magnetron is probably overheating and causing the magnetron thermostat to open.

Then when it cools, it closes the circuit and allows power through again.

When checking TCOs or thermostats, if it has a hood fan thermostat, that should read open, as opposed to the others, which should read closed.

The TCOs you need to be concerned usually with have all black or white wires only. Please reply with photos of your interior if you have questions.

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 (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.

If it's intermittent or random, it may be a bad connection, usually on the control board or a loose fuse holder, or even an intermittent fuse.

You should do a continuity test on the fuse while it's in the holder (with the microwave unplugged, of course) then turn the fuse by hand or take it out and put it back in, then test it again.

If you remove the fuse, then press the meter leads against the ends, it can allow internal contact to be made and make a bad fuse appear to be good.

If you or someone you know decide to look into it, we have critical safety information and disassembly information at our site, and our link is at our listing here on FixYa.

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

Posted on Oct 13, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

MY DAEWOO MICROWAVE KOR 1B4 H JUST STOPPED WORKING.


Maybe time for a new one. But just in case check the power outlet still has power and the circuit breaker is not tripped.

Dec 01, 2015 | Daewoo KOR-1B4H Microwave Oven

1 Answer

Microwave went dead as soon as I started heating. Replaced its fuse:58001220


The klystron or the hi voltage transformer are faulty. The klystron is the part that generates the microwaves. The transformer supplies the voltage to operate the klystron.

Dec 31, 2014 | Microwave Ovens

1 Answer

My microwave went dead while heating up something what could it be


It probably blew the main fuse. Since it blew when it was running, it might indicate that the fuse holder isn't holding the fuse tightly enough; causing it to heat and internally melt.

You also could have some sort of failure, or failing component, in the high voltage circuit.

Jun 27, 2014 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

I have an over the stove Jenn air microwave. I was making jam--using all burners on high heat for several hours. We were using the timers on the micro..In the midst of the operation the microwave went...


For electronics, as with most most other types of machines, heat is the enemy.
The circuit boards in a microwave are mounted directly behind the bottom cover, and if the air below he machine is extremely hot, the board's components will slowly cook until they break down.

Assuming that the replacement is mounted in the same place, then your answer is: Yes, it can and most likely will happen again, given the same circumstances.

I see 2 logical options to help save the microwave;
The first is to block the heat, by adding a heat-shield under the microwave.
There are a few presentable models on the market, and they're just a simple aluminum diffuser with a thin layer of insulation behind it.
The second is to redirect the heat, by setting a small fan on the counter next to the stove (just a few inches taller than the pots on the burners) that will push the rising heat away from your microwave.

The 'fan plan' is an old-school quick-fix that you can pull out when you need it, and will work fine while you shop/hunt for a proper heat-shield that fits your decor.


***Don't forget to VOTE for the guys who take an interest in helping!

Sep 12, 2010 | Microwave Ovens

2 Answers

My Russell Hobbs microwave will not generate heat


If everything else is normal, the trouble may be a failed magnetron tube (the microwave source), problems on the control circuit board, or parts in the tube power circuit that are bad. It's also possible a door switch can be at fault, but this usually keeps something else (fan, turntable or light, most often) from running as well.

Microwave servicing is best left to professionals. There are potentially deadly voltages present, and a chance of microwave leakage if repairs aren't done correctly. Take the oven to a shop for an estimate, or just consider replacing it if it isn't a built-in, an over the range unit or a high-end countertop model.

Feb 02, 2010 | Microwave Ovens

1 Answer

Microwave went dead


Hi

If your microwave oven doesn't seem to work at all, check these: Fuses Usually, when your microwave oven doesn't work it all, the internal fuse (thermal fuse) is blown. This fuse protects both you and the oven. When it blows, you need to have a qualified appliance repair technician replace it.

Door switch If the fuse isn't the problem, check the door hooks and the door-release button. When these are broken, the door switch doesn't activate, so the oven can't work.


Please do rate the solution as FixYa and revert for further assistance.

Thanks
Rylee

Apr 26, 2009 | Whirlpool MH7140XF Microwave Oven

1 Answer

Sanyo EM-710F display dead


Low voltage Tx actually OK. Restored vaporised circuit tracks on controller board, fuse and interior light globe. All working OK.

Jun 18, 2008 | Microwave Ovens

1 Answer

Sunbeam microwave doesnt heat


check  highvoltage circuit and magnetron and diodes and condencer and related parts, control circuit also check.

Oct 26, 2007 | Sunbeam SBM1000 Microwave Oven

Not finding what you are looking for?
Microwave Ovens Logo

Related Topics:

41 people viewed this question

Ask a Question

Usually answered in minutes!

Top Panasonic Microwave Ovens Experts

William Miller
William Miller

Level 3 Expert

8820 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17129 Answers

Devabhakthuni...
Devabhakthuni...

Level 2 Expert

224 Answers

Are you a Panasonic Microwave Oven Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...