Question about KitchenAid KBMS1454R Microwave Oven

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Microwave turns off and on repeatedly

I have a KitchenAid KBMS1454RSS microwave that turns off and on repeatedly on its own (after pushing start). All door switches check ok with multimeter. I tried it with the magnetron disconnected and it acts the same. Can I assume this means that the magnetron is not the problem? Any ideas what could be wrong? This started suddenly last week, and we haven't tried to use it much since.

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  • uriah37 Nov 10, 2008

    I have the exact same problem with mine. It was installed in July 2005. It will continue to heat but shuts off and on continuously until timed out. Is is a leaking magnetron? Warranty will cover parts cost for magnetron replacement until 5 years.

  • tseind Dec 11, 2008

    We have the same problem with the same KitchenAid model. Had it looked at several time, they clean it, put it back together and it may work when their there, but as soon as they leave it starts acting up. At times it can work fine for several months, but the problem always comes back.

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6 Suggested Answers

  • 95 Answers

SOURCE: ge spacemaker microwave jvm/1650

Mmmm it's so easy,
First disconect the power, take the cover off, moslitly there would be 5 screws and two tab's on the top.
inside on the right hand side the magnetron it's a sylver box measuring about 4 in x 4 in x 5 in. It will have a plasic cover moslitly that would have to be remove first then on the magnetron there is 4 crews and one connector.
It should fall downard after.
If you have a power supply after the secondary , that may also be your problem.

Regards

Bob

Posted on Jan 22, 2008

MicrowaveSvc
  • 8820 Answers

SOURCE: GE microwave replacement magnetron

At first I was concerned but then I realized what it was.

Congrats on their sending you the mag!

How did you convince them to do that? Did they make you sign a waiver?

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

Posted on Jan 28, 2008

  • 579 Answers

SOURCE: Fuse location on a KitchenAid Microwave

To check the internal fuse. Unplug the oven, unscrew and take off the cover, the fuse should be easily found in the back by the power cord. It looks like a regular fuse but is white instead of clear glass because microwave fuses are special. You'll have to measure it for continuity with a meter as a result and be sure to replace it with the same kind. (try finding them at radio shack) Hopefully there isn't something more serious also.
Hope ya fix it!

Posted on Jan 30, 2008

reg501
  • 413 Answers

SOURCE: F9 error

Your Microwave uses "UltraWave technology"
I'll explain a few things about this wonderful technology...
The control board (accepts the pushbutton commands) has to talk to the inverter board to tell it how much power should be applied to the magnetron. The inverter board will then power the magnetron and inform the control board if the magnetron is working OK.
If there is something wrong with the magnetron or inverter board or a there is a communication breakdown between the control board and the inverter board...WA-LA-----F9----

A pretty reliable test for the Magnetron is to operate the oven and listen for a ticking sound 5-6 times about a second apart. If you can hear the ticking....The magnetron has failed..if no ticking, the control or inverter board failed.

The Magnetron sells for about $78.00 and is simple to replace. Check your owners manual for limited warranty on the MAG and electronic parts.

Posted on Jun 12, 2008

MicrowaveSvc
  • 8820 Answers

SOURCE: KitchenAid Superba Microwave/Oven, Microway Door message

This is usually caused by either a bad door switch, a loose door switch mount (which are pretty simple problems to fix) or occasionally a problem on the control panel.

Even though a door switch clicks, it may still be bad inside. Its continuity must be checked.

Door switch or mount trouble can be caused by slamming the door or by opening the door while it's cooking without hitting the Stop pad first.

There are plastic mounts inside the microwave which hold the door switches and onto which the door latches lock when you close the door.

The screws on these mounts may be loose. If they get too loose, the switches will not be activated properly.

Sometimes it's a broken tab on the switch holder, allowing the switch to rotate just out of position. This tab can be hard to see, since it is under the bottom edge of the switch.

One test that sometimes helps is to gently lift up (and/or push down) on the door or handle as you try to start it. If it works or tries to work, then it's a door switch mount or door alignment issue.

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

You can find helpful exploded view diagrams and order parts by entering your full model number here.

There may also be a "mini-manual" hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting & testing.

If you only need a switch, you can order one from us for $5 postpaid.

If you think the problem is on the control panel, we repair these nationwide by mail for $39.95 postpaid in most cases.

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

Posted on Sep 27, 2008

  • 112 Answers

SOURCE: Kitchenaid builtin microwave buzzing

I would recommend changing the diodes as well. This will usually take care of the problem.

Posted on Oct 25, 2008

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