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I have a old Jenn air microwave M130 that blows fuse when pushing start button?

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Yourmag is probably shorted

Posted on Oct 14, 2013

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Posted on Jan 02, 2017

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MicrowaveSvc
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SOURCE: Jenn-Air JMC7000 Microwave Stopped working

So it's dead? (No display, no inside lights, no beeps?)

A microwave can be dead for many reasons.

If it goes dead for a while during or after cooking then comes back on, the magnetron is probably overheating and causing the thermostat to open. When it cools, it closes the circuit and allows power through again.

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

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

If you or a friend decide to look into it, we have critical safety information and disassembly information at our site, linked here on Fixya: http://tinyurl.com/yzjozk

You can find helpful exploded view diagrams and order parts by entering your full model number here: http://tinyurl.com/gv383

Please write back with more details if you need further help.

We appreciate your thoughtful rating of our answer.

Posted on Nov 18, 2007

MicrowaveSvc
  • 9047 Answers

SOURCE: JENN AIR MICROWAVE FUSE (JENN AIR MODEL M167)

The fuse holder may be loose.

With the microwave unplugged, if you can easily turn the fuse with your thumb & forefinger while it's in the holder, it has overheated and fatigued and should be replaced.

Simply squeezing its terminals together with pliers is not really a good solution.

When a connection is loose, heat results, which eventually melts the fuse internally.

This is usually evidenced by a very tiny ball of solder at the point where the end cap meets the body of the fuse.

You can use a generic holder - it's a lot cheaper than ordering one. The connectors should be 1/4" tabs and it should be rated at 20 amps or better.

You should be able to get one from a home center or local appliance parts store.

If it's not loose, then it may be a failing magnetron or high voltage transformer pulling too much current.

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

Posted on Apr 12, 2008

  • 1 Answer

SOURCE: Jenn-Air Microwave vent grill opens and closes

I have this same problem occasionally. Pull the vent grill open and look for a white cam that rotates when the microwave is on. To the right of that cam, there are two gray switches. The bottom switch should have a red tab that pops out. When the vent grill opens and closes continuously, the red tab is stuck in. Take a flat screwdriver or tooth pick and push gently in on the red tab to release it. It must get stuck due to grease or dirt accumulation. Good luck.

Posted on Oct 19, 2011

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2 Answers

My Jenn-aire microwave says locked and has a picture of a padlock. I was microwaving bacon and had just put it some to cook ( my second batch per se) and everything was locked up. I tried pushing options...


Most likely you set a child lock (front panel lock) by holding a button too long (3 seconds). Without a model number, I can't be absolutely sure of the keypad lock for your Jenn-Aire microwave. Usually, the key will have a small padlock icon on it. Press and hold this key. On my microwave you press and hold Start to toggle the lock off.

On a Jenn-Aire JMW2430 and similar models, the Button Lock is activated by a several step process (More and Button Lock). However, pressing and holding the Start button will deactivate it.

I hope this helps.

Cindy Wells

Apr 19, 2011 | Jenn-Air Microwave Ovens

2 Answers

Jenn-Air Microwave vent grill opens and closes


I have this same problem occasionally. Pull the vent grill open and look for a white cam that rotates when the microwave is on. To the right of that cam, there are two gray switches. The bottom switch should have a red tab that pops out. When the vent grill opens and closes continuously, the red tab is stuck in. Take a flat screwdriver or tooth pick and push gently in on the red tab to release it. It must get stuck due to grease or dirt accumulation. Good luck.

Apr 20, 2010 | Jenn-Air JMV8166B 950 Watts Convection /...

1 Answer

HOW TO REPLACE BLOWN FUSE


Look for a reset button on the back--push to reset. If trips again, unit has probable short.

Jul 11, 2009 | Jenn-Air JMV8208A Microwave Oven

1 Answer

JMV8208 BAW Model 30" Jenn-Air Convection/Micro combo


have a good look at front to see reset??.press it once it comes back on unplug from the wall and & open it up and go to the part and give it a good clean with wd40, check the push pad for ware & tare dirt gathers and builds up

Mar 09, 2009 | Jenn-Air JMV8208A Microwave Oven

3 Answers

JMC7000ADW Blows circuit breaker


I've had this problem twice with our microwave. The hint to where the problem lies is that the breaker blows when you open the door at times. Inside the microwave are three microswitches; primary and secondary interlock micro switches and an Interlock Monitor switch. The switches are supposed to shut down the microwave if it is running and the door is opened. But, I've found the upper primary switch can stick internal at times and when the door is opened the stuck switch will, because of the way it is wired as a safety switch, cause either the fuse or possibly the main circuit breaker for the oven to pop. The reason the stuck switch blows the breaker or fuse is when the door is opened the interlock switch will cause the neutral wire from the AC power to be applied to the Upper Primary Interlock switch which normally should be open when the door is opened, but if the switch is intermittent or the contacts weld themselves shut the neutral line is connected direct to the "hot" side of the power line through the fuse and thermostat. The first time my microwave failed the switch had melted the contacts together inside the switch and the second time the switch became intermittent and would blow the breaker to the over ever so often. I suspected the switch the second time this happened and utilizing an ohm meter I checked the switch several times by opening and closing the door and once in a while it would remain closed instead of opening when the door was opened. Of course while trouble shooting the power cord to the microwave must be disconnected and use all safety precautions when working around the high voltage areas inside the microwave. I wrote Jenn-Air about the bad switch and the way it is wired into the circuit, but never received any acknowledgement. I suspect these microswitches are under rated for the amount of current that passes through the switch, thus they overheat and eventually arc the contacts together. I hope this helps explain the intermittent problem and could explain many of the intermittent blown fuse problems I see in these internet help sessions

May 09, 2008 | Jenn-Air JMC7000 Microwave Oven

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