Question about Bosch HMB402 Microwave Oven

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I HAVE A BOSCH HMB405/01 IT IS 2 YEARS OLD BUT THE DATE ON THE UNIT SAYS 04 FOR THE LAST YEAR FROM TIME TO TIME WHEN YOU STAT IT UP IT SOUND AND LOOKS LIKE A LIGHTNING STORM ON THE INSIDE IF YOU STOP THE UNIT AND RESTART IT WILL WORK CORRECTLY HALF OF THE TIME.

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6ya6ya
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Posted on Jan 02, 2017

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MicrowaveSvc
  • 9047 Answers

SOURCE: Microwave Magnetron tube has arced

If the cavity metal of the oven is chipped or charred, it will have to be sanded smooth and clean and dried thoroughly.

Then you can apply some high-temperature appliance paint, available from hardware stores, department stores or appliance parts stores.

If your waveguide cover is burned, it will need to be replaced. It provides important protection for the magnetron.

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

Posted on Dec 08, 2008

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bestdarngood
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SOURCE: Bosch HMV9306 - appears like it is working.

Sounds like the magnetron has failed. This is the component that produces the microwave that heats the food. The cost of the magnetron is about 95% of the cost of a microwave . Most people don't, for this reason, replace the magnetron, they replace the whole oven which is probably what you will end up doing. There is a possibility that the circuit that provides power to the magnetron is faulty and you need to take it apart, find the proper electrical leads and test them with a volt meter. To do this you have to remove it from its mounting and take it apart. It is a fairly lengthy process however.

Benjamin

Posted on Jun 26, 2009

heatman101
  • 43501 Answers

SOURCE: Bosch HMB405 microwave will not heat

Hi,
Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101
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Posted on Sep 30, 2010

  • 8909 Answers

SOURCE: My Bosch innowave microwave oven

It sounds like the magnetron may have either failed or is not being supplied with the extremely high voltage required to run it.

YOUR SAFETY IS PARAMOUNT

This is a job for a professional but if you are safety clued up, here's instruction.
Make sure the !!!!capacitor is discharged!!!!! before attempting any sort of repair.
Check the door interlock switches first then the high voltage diode with either an AVO model 8 or moving coil meter on high resistance range for short circuit, (DVM's won't show the fault!), the capacitor can fail and go short circuit, the feed fuse on the primary of the high voltage transformer and then finally, the magnetron is best checked by substitution.
Hope that helps.



Load test.

A simple safety test.
Place 1/2 litre of water in a glass container. Measure the temperature of the water.
Place in microwave and heat on full power for 1minute.
Measure the temperature after it has stood for 1minute.
If the temperature difference is more than 9 degrees Celcuis the magnetron is working and producing about 700Watts of heat.
If your microwave is labelled with 900 or 1000Watts. That is about right.
If the temperature is less then the magnetron is not working properly and may need replacing.


This a only a rough guide and any doubts you should consult an authorised service agent.


Posted on Jan 23, 2011

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2 Answers

Hmv9305/01 microwave @ 13months old the magnetron blew, authorized bosch repairman, replaced using bosch magnetron. warranty for 90 days jan of 2011 same problem, why does this happen? should i ditch...


With all due respect, what are you doing to it?
If you use it with nothing in the cavity, that will kill the magnetron otherwise it will last for years and years.
Very unusual and Bosch is a well respected name.
If there is a probem with the oven, Bosch will replace it so take it up with Bosch.

Apr 01, 2011 | Bosch HMV9305 Microwave Oven

1 Answer

Buzzing sound... Turntable stopped. food heats up but uneven. No microwave fan when heating.. no light inside expensive fix?? Unit is 10 years old


If the microwave oven is 10 years old then it is time to consider a new unit, by your description it is going into cascade failure where different parts have stopped working, the buzzing sound is the magnetron warning you, it is about to fail. The fans job is to keep the magnetron cool while it is running.

Mar 08, 2011 | GE JVM1850 1000 Watts Microwave Oven

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Microwave oven just quit. Have checked fuse and plug. Have had no earlier problems. Do these ovens just ''wear out''? It is 8 years old. It is a GE Spacemaker. (November 2002) GE Spacemaker Serial...


yes they wear out. usally the first part to quit is the unit inside that creates the microwaves called the "magnetron" over time they will wear out, and so will the circuitry that runs the entire microwave, some will last 8 years like yours, some only a year or 2. 8 years is pretty good for the life of a microwave. but yea, its time to get yourself a new one. good luck to you

Jan 15, 2010 | GE Spacemaker JVM1640SJ Microwave Oven

2 Answers

Microwave won't heat


Sorry my Clarification Request came out as a single blob of a paragraph.

That's not how I typed it. I never write that way!

So I've pasted it here, but as a solution.



Magnetrons generally should last about 2000 hours, but several factors can shorten that.

If it's not OVER ten years old (from the purchase date or the date on the tag inside the unit) then the magnetron is still under warranty.

From the owner's manual:

"For the second through the tenth year from the date of original purchase

"The magnetron tube, if the magnetron tube fails due to a defect in materials or workmanship. During this nine-year limited warranty, you will be responsible for any labor or in-home service costs.

"For the above limited warranty: To avoid any trip charges, you must take the microwave oven to a
General Electric Customer Care® servicer and pick it up following service. In-home service is also
available, but you must pay for the service technician’s travel costs to your home."


GE Customer Service is here, and you can verify the warranty status and find your nearest authorized servicer.

If you're sure the magnetron's bad, it's still under warranty, and you or a friend are handy, they will send you the magnetron to do it yourself. Call them at 888-239-6832.

Be persistent. You may have to speak with a supervisor.


It does sound like the magnetron overheated and the magnetron's thermostat opened until it cooled down.

An overheating magnetron can be due to:
  • operating oven without cover(s) in place
  • wrong magnetron installed in oven
  • an old or otherwise failing magnetron
  • cracked magnetron magnet
  • improper power line voltage (should be 110-125VAC)
  • foods low in moisture (popcorn & bacon, e.g. - add 1/2 cup of water in rear oven)
  • failed or inoperable cooling fan or hood vent exhaust fan
  • deteriorating foam weatherstripping seals in air ducts or on outside cover
  • blocked air vents (dust, animal nest debris, insufficient free air space behind & around oven, etc.)
  • clogged or greasy charcoal filter or grease filter
  • blocked duct in hood vent exhaust
Since yours is a counter top model, there are less of those factors to worry about.

When you hit Start to microwave, do the inside light, cooling fan, and turntable all come on?


Any unusual noises? Is it louder or quieter than usual?

We have a sound clip of what a microwave should sound like when the cooling fan and high voltage section are operating here.

You can find helpful exploded view diagrams and order parts if needed by entering your full model number from the tag on the oven here.

Let us know what you find out or decide.

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

Jul 05, 2009 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

No Signs of Life


If it's less than one year old, it should be fully covered under warranty.

I'd suggest contacting the manufacturer to get it fixed free or you may have to return it to the dealer.


GE Customer Service is here.

Usually they will go by the date on the tag on the oven to determine warranty.

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

Feb 04, 2009 | GE JES1358 Microwave Oven

1 Answer

Panasonic Inverter Microwave, NN-H665BF, Smoking Issue


The magnatron is covered by warranty for 5 years and I just spoke with an authorized Panasonic repair center who said the inverter is covered on this unit depending on the manufacture date, like april 04 to october 05 approximately.


Jan 21, 2009 | Panasonic NN-P294SF Microwave Oven

1 Answer

GE JVM1650 Microwave Suddenly Stops


Your magnetron tube is leaking RF energy inside and zapping the main board. It is NOT dangerous as any leakage will be contained inside the unit. You will need a new mag tube and it is covered by a 5 or 10 year parts warranty. Call GE Factory Service at 1-800-432-2737or schedule online at www.geappliances.com

Dec 18, 2008 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

Doesn't work


Sounds like your magnetron has failed and was going bad for some time.

I would contact Bosch to find their nearest authorized servicer.

If it's less than one year old, it should be fully covered under warranty. I'd suggest contacting the manufacturer to get it fixed free.

If it's within the magnetron portion of the warranty (usually 5-9 years) but out of the original full warranty (usually 1 year), then your manufacturer will cover the part cost, but not the cost to visit you or the labor charge to do the work.

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

Nov 28, 2008 | Bosch HMV9305 Microwave Oven

2 Answers

Inside of microwave doesn't work


I'm hearing of this more and more, and I'm begining to be concerned that a recall or "campaign" by GE may be in order! Since your is less than a year old, it should be in warranty. If so (or even if it's not) I would strongly suggest that you call the GE Answer Center at 800-626-2005 to tell them abou tyour unit and ask them all about this. Please do let us know here what you find out! Assuming your power, circuit breaker, and outlet are all okay, then the problem is inside the oven. Some of the many problems inside the microwave which could cause this are loose or intermittent power cord, fuse, fuse holder, thermostat / thermal cutout, wiring, circuit board power part, or the code in the microprocessor. But the last one is the one I'm most concerned about. The others just aren't very likely unless there has been a breakdown in the design or manufacturing process. Post back if you need more help, but please do let us know here what you find out.

Dec 23, 2006 | GE JVM1653 Microwave Oven

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