Question about Bosch HMB402 Microwave Oven

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My microwave does not cook foods - it is 3 yrs old and I accidentally turned it on without placing food or liquid inside. Is it toast??

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6 Suggested Answers

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Posted on Jan 02, 2017

MicrowaveSvc
  • 9047 Answers

SOURCE: Microwave does not heat food placed in the center of the turntable. Leaves a cold spot in the middle of the food.

This is normal. That's why I always recommend to my customers that the food be placed slightly off-center on the turntable. An analogy I refer to is stirring paint: If you stir paint with a stick by simply rotating the stick in the center of the can, it's far less effective than pulling the stick around an imaginary circle halfway bewteen the center and the edge.

Posted on Sep 15, 2006

  • 54 Answers

SOURCE: maytag microwave MMV5165AAB approx. 3 yrs old; everything works

maybe thers something wrong on its heater....go to electronic shop for more info. thanksss

Posted on Jan 21, 2009

bestdarngood
  • 3037 Answers

SOURCE: Doesn't heat food or liquid.

Sounds like the magnetron has failed. This is the component that produces the microwaves that heats the food.

The cost of the magnetron is about 95% of the cost of a microwave oven. 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 Apr 26, 2009

ginko
  • 19396 Answers

SOURCE: everything runs but food does not heat up

est the high voltage capacitor,the rectifier diode.or the magnetron. If all this are fine, test the control board.

Thediode and capacitors can br tested. The capacitor must bealloweddischarge before testing, or you risk to get electrocuted, evenifpower is off. Capacitors can get discharged by shorting theirtwocontacts.
Before replacing the magnetron test also the control board.
Replace the magnetron if the checks and all of the high voltage component tests are good, but the unit still does not heat.



All locations, and description of this parts can be located using the diagram here: Counter top.

Parts must be tested to find out what is wrong.

Remember that microwaves are potentially dangerous devices if not repaired properly, the job must be done by a competent person.
A microwave energy leakage test must always be performed when the oven is serviced for any reason.

Regarding parts, contact the seller here to purchase parts.

Posted on Apr 27, 2009

bestdarngood
  • 3037 Answers

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

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2 Answers

I need instructions for 10in. microwave browner


Only place I've found is here: CorningWare Browner Instructions

As these dishes were designed by Corning for a 650 watt over, you can recalculate preheat and cooking times for your oven with the following formula:

650/(your oven's wattage) x (listed preheat time or cook time)

For example, for a Corning MW-9 dish, they list 4 minutes maximum preheat time. I have a 1,580 watt oven. So 650/1580 = .41 x 4 minutes = 1.64 minutes and about a minute and a half preheat. (MAX).

Mar 09, 2014 | CorningWare Microwave Ovens

Tip

Microwaves and how they work. ­T­he microwave oven is one of the...


Microwaves and how they work.

Caption
--> ­T­he microwave oven is one of the great inventions of the 20th century -- millions of homes in America have one. Just think about how many times you use a microwave every day:


Caption
-->
­

­You're running late for work, so there's no time to fix breakfast at home. On your way to the office, you stop to gas up your car. Inside the quickie-mart, you grab a frozen breakfast burrito and pop it in the microwave on the counter. Later that day, you have to work through lunch. By 3:00 p.m., you're starving, so you grab a snack-pa­ck of microwaveable popcorn from the vending machine and pop that in the break-room microwave. That night, after a really long day at work, you're simply too tired to grill out, so you dish up last night's lasagna and heat it up in the microwave...
As you can see, microwave ovens are popular because they cook food in an amazingly short amount of time. They are also extremely efficient in their use of electricity because a microwave oven heats only the food -- and nothing else. In this article, we'll discuss the mystery behind the magic of "meals in a minute" with microwave cooking.

­A m­icrowave oven uses microwaves to heat food. Microwaves are radio waves. In the case of microwave ovens, the commonly used radio wave frequency is roughly 2,500 megahertz (2.5 gigahertz). Radio waves in this frequency range have an interesting property: they are absorbed by water, fats and sugars. When they are absorbed they are converted directly into atomic motion -- heat. Microwaves in this frequency range have another interesting property: they are not absorbed by most plastics, glass or ceramics. Metal reflects microwaves, which is why metal pans do not work well in a microwave oven.

Microwave cooking ­You often hear that microwave ovens cook food "From the inside out." What does that mean? Here's an explanation to help make sense of microwave cooking.
Let's say you want to bake a cake in a conventional oven. Normally you would bake a cake at 350 degrees F or so, but let's say you accidentally set the oven at 600 degrees instead of 350. What is going to happen is that the outside of the cake will burn before the inside even gets warm. In a conventional oven, the heat has to migrate (by conduction) from the outside of the food toward the middle. You also have dry, hot air on the outside of the food evaporating moisture. So the outside can be crispy and brown (for example, bread forms a crust) while the inside is moist.

In microwave cooking, the radio waves penetrate the food and excite water and fat molecules pretty much evenly throughout the food. No heat has to migrate toward the interior by conduction. There is heat everywhere all at once because the molecules are all excited together. There are limits, of course. Radio waves penetrate unevenly in thick pieces of food (they don't make it all the way to the middle), and there are also "hot spots" caused by wave interference, but you get the idea. The whole heating process is different because you are "exciting atoms" rather than "conducting heat."
In a microwave oven, the air in the oven is at room temperature, so there is no way to form a crust. That is why microwavable pastries sometimes come with a little sleeve made out of foil and cardboard. You put the food in the sleeve and then microwave it. The sleeve reacts to microwave energy by becoming very hot. This exterior heat lets the crust become crispy as it would in a conventional oven.




­

on May 07, 2010 | Microwave Ovens

1 Answer

I have the Dacor DCM24 microwave and if the table does not spin will the microwave still cook food. I think my turn motor is bad, but wanted to know if I could cook food without it?


Yes! it will continue to cook food, the only difference you may end up with cold spots in the food, rotate plate once or twice to reduce this.

May 30, 2012 | Dacor DCM24 Convection/Microwave Oven

1 Answer

Microwave wont heat up food


If your microwave runs, but doesn'theat your food, verify that you have selected a cooking setting. You mayaccidentally set the timer. Test the magnetron by placing 1 cup of water in themicrowave and heating the water for three minutes. If the water doesn't heat,your magnetron is dead.

Mar 08, 2012 | Sanyo Microwave Ovens

1 Answer

How to use the Tesco mtg06 microwave grill?do not have instruction manual


The oven may be used purely for microwaving or simply as a grill for cooking such things as toast. The radiant or quartz grill may be used in a variety of ways. You can use microwaves that have grill functions to roast foods, for baking purposes or for grilling food such as bacon or sausages on the racks. Some models also allow you to use both the oven and grill together, and you can produce fantastically presented meals by using the grill to brown off your dish after cooking. The grill will often have low, medium and high settings for you to choose from, letting you control how brown your food is. By using a microwave with a grill, you can prepare great meals or snacks in a fraction of the time that it would take if you used a conventional oven and grill. Microwaves are particularly convenient, as you don't have to keep checking on the food or stand over it as it cooks.

Jul 29, 2011 | Sanyo Microwave Ovens

1 Answer

I have a Sunbeam SMO701A7E microwave and I want to permanently turn off all beeps ( food ready, food still ready, even start and stop) Is this possible?


Without physically cutting the wires to the sounder, no. If you remove the sounder, it will become possibly dangerous as one will not know, if not remembering, that the food inside is hot or cold and could cause an accident or food poisoning if not cooked properly.

Feb 23, 2011 | Microwave Ovens

1 Answer

Microwave not cooking and cuts out prematurely


Hi! the problem you have stated indicates that the magnetron its not functioning, check for busted fuse.

Sep 16, 2009 | Sharp R-1510 Microwave Oven

1 Answer

Is it safe to heat our food without any cover in the microwave?


Yes it is perfectly safe to heat food without a cover. It is the microwave that cooks the food from the inside out and it does not leave any radiant behind. I hope this helps. Don't forget to rate my answer.

Feb 22, 2009 | Maytag MMV5207AAS Microwave Oven

1 Answer

Maytag microwave MMV5165AAB approx. 3 yrs old; everything works


maybe thers something wrong on its heater....go to electronic shop for more info. thanksss

Jan 21, 2009 | Maytag MMV5000 Microwave Oven

2 Answers

Microwave does not heat food placed in the center of the turntable. Leaves a cold spot in the middle of the food.


This is normal. That's why I always recommend to my customers that the food be placed slightly off-center on the turntable. An analogy I refer to is stirring paint: If you stir paint with a stick by simply rotating the stick in the center of the can, it's far less effective than pulling the stick around an imaginary circle halfway bewteen the center and the edge.

Jun 09, 2006 | Whirlpool MH6150XMS Microwave Oven

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