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Micro wave operates for a few seconds then shuts down, light goes out, but fan continues to work

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If the digital programmer circuit / controller does not get a feedback signal from the inverter for a period of 3 seconds, the controller will stop the cook cycle.

The oven will also strop after 22 seconds if there are certain problems with the inverter or magnetron.

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.

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

Posted on Jul 19, 2008

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My microwave shuts down after 3 seconds. The clock goes back to the current time and the fan still works. Timer still works also. Any suggestions?

Posted on Dec 31, 2008

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Posted on Jan 02, 2017

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Micro wave oven works for approx 5 seconds than stops


follow this steps and fix it. God bless you


  1. Main control boardIf your microwave runs for a few seconds and stops, the first thing to check is the main control board to ensure that a shortage has not occurred. If the part is defective then it will need to be replaced to prevent continual shut offs. If this is not the issue, the next step would be to check for a faulty touchpad.
  2. Touchpad/Control panelIf the control board is not the issue and your microwave continues to shut off after running for only a few seconds, the next thing to check is your touchpad, which is also known as a control panel. Although uncommon for this issue, symptoms are usually that the display and some buttons are working properly; however, when selected some buttons are not functioning. If this is the case the touchpad will need to be replaced.

Nov 14, 2013 | Microwave Ovens

5 Answers

Sumsung MU3250W shut down


The problem is your magnetron tube is leaking RF. The mag tube comes on 2-3 seconds after you hit start, and the RF interfears with the board and shuts it down. Drop the front of the control panel down and watch, it wont happen.. Get a new mag tube put in and you'll be good to go.

Oct 19, 2008 | Samsung MU3250W Microwave Oven

1 Answer

Ive got a d90d25eslr111-b1 micro combi,i poached an egg ani ie exploded in the micro,it blew the electic and went off,if i swith it on its ok,as soon as i shut the door it fuses the electric. why plea


see this causes and fix it. God bless you
If the microwave runs for a few seconds and stops the thermostat might be defective. Watch our video on testing thermostats.
If the microwave runs for a few seconds and stops the thermoprotector may have tripped. This is a safety device to prevent the microwave from overheating. It can be tested for continuity to see if it's blown.
If the microwave runs for a few seconds and stops the high voltage transformer might have an intermittent short. This is not common. Check other components related to the microwave symptom first.
If the microwave runs for a few seconds and stops the touchpad might be at fault. This is not common. Generally speaking, if the dishwasher display is working and some of the buttons respond correctly but some don't, the problem is with the touchpad.
If the microwave runs for a few seconds and stops the touchpad and control panel might be defective. There are several other components that can cause this problem, be sure to check any other components before replacing this board.
If the microwave runs for a few seconds and stops there may be a short circuit in the main control board. Check other components first, these boards are often misdiagnosed.
If the microwave runs for a few seconds and then shuts off, a door switch might have failed intermittently. Check each of the door switches for any signs of overheating, arcing, or burning. Also check each of them for continuity. Replace any of the switches that is visibly damaged or that only has continuity intermittently.

Sep 27, 2012 | Morphy Richards Microwave Ovens

1 Answer

I have a GE Profile Spacemaker model JVM1660SB005, maufactured in November 2000. I attempted to change a burned out bulb on the left side. I did not check the manual to see how to remove the bulb, nor...


I regularly see (and repair) this light and / or fan failure on model JVM1660SB005 and most any model of over the range microwave.
The problem is on the controller assembly, which I regularly repair very affordably.

At my Web site, you can get details, plus I have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

This light failure often occurs when a bulb goes out and the filament shorts, or when the bulbs are removed or installed without first unplugging the oven from the power line. Either can cause such a failure on the controller.

The lights can can be inoperable or stuck on or stuck in "night light" mode. Sometimes this will similarly affect the fan operation or inside light, too.

For more free DIY and other help & advice, feel free to contact me via my site.

Please include FULL model number*, FCC ID number*, + detailed symptom information. ( * on the tag in cooking cavity or around door frame or control frame or on back)

William E. Miller, AS-EET
http://www.microwavecontrol.com
Microwave Oven Control Panel Repair Nationwide
"Recycling by repairing since 1982"

Mar 05, 2017 | GE Microwave Ovens

1 Answer

I have a GE Profile Spacemaker model JVM1660SB005, maufactured in November 2000. I attempted to change a burned out bulb on the left side. I did not check the manual to see how to remove the bulb, nor...


I regularly see (and repair) this light and / or fan failure on model JVM1660SB005 and most any model of over the range microwave.
The problem is on the controller assembly, which I regularly repair very affordably.

At my Web site, you can get details, plus I have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

This light failure often occurs when a bulb goes out and the filament shorts, or when the bulbs are removed or installed without first unplugging the oven from the power line. Either can cause such a failure on the controller.

The lights can can be inoperable or stuck on or stuck in "night light" mode. Sometimes this will similarly affect the fan operation or inside light, too.

For more free DIY and other help & advice, feel free to contact me via my site.

Please include FULL model number*, FCC ID number*, + detailed symptom information. ( * on the tag in cooking cavity or around door frame or control frame or on back)

William E. Miller, AS-EET
http://www.microwavecontrol.com
Microwave Oven Control Panel Repair Nationwide
"Recycling by repairing since 1982"

Mar 05, 2017 | GE Spacemaker JVM1640SJ Microwave Oven

2 Answers

Model JVM1650WH02 will shut off about 2 seconds or less into cook time. everything else works such as light and clock and sometimes the wave will cook.


magnetron is leaking internally, do not use until magnetron is replaced. the mag creates interference with the control board and resets it

Feb 05, 2010 | GE JVM1650 1000 Watts Microwave Oven

1 Answer

Loss of all power when trying to cook/defrost


The cost of repairing the micro wave will out cost the replacement value. If its new then use gaurrantee for replacement

Sep 03, 2009 | Microwave Ovens

1 Answer

Boiling waer under micro wave lots of steam into micro wave, turn on micro wave ,pop noise like glass miro wave comes on louder hum than normal no heat


Q - The microwave display counts down and the inside light is on,  but nothing is heating and the fan is not running.
A - This most commonly is a bad door switch, other possible problems are a faulty relay or solder joint on the power module, but a bad door switch is most common.
 Q - My microwave is running and sounds like it is working but will not heat up anything.
A - Many thing can do this but, common things are....loose high voltage wire.....poor solder joint on board.....magnetron.....power relay.....
Q - The microwave makes a loud "hum or buzz" noise but will not heat up the food?
A - 9 times out of 10 this is usually this is a bad magnetron, the other time is sometimes a bad high voltage diode. See components section.

Mar 03, 2009 | Amana Radarange Microwave Oven

1 Answer

Micro Wave shuts down


If it stops after 22 seconds, that means the controller has detected a problem, usually 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.

You can find an authorized Panasonic servicer here.

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

Nov 19, 2008 | Panasonic NN-S443WF / NN-S443BF 1200 Watts...

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