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Does a microwave lose cooking power over time? having a problem cooking popcorn. whirlpool built in unit 18 yrs old. takes 4-5 min on high and cant cook most of it. more time just burs popcorn. i believe orig rating was 900w.

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Yes. As the magnetron (The microwave generator) ages with use it becomes less efficient. As such it produces less powerful microwaves and loses penetrating power:::Spiceweasel.au

Posted on Apr 04, 2008

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Have a kitchenaid microwave KHMS2040WSS brand new. Is there a way to set the popcorn sensor for a smaller bag? Right now it is set for 3.5oz and burns all the popcorn.


I have never seen a microwave that doesn't burn popcorn if you use the "popcorn" button. Why the manufacturers keep putting them on I'll never understand. There's nothing you can do change the presets on an oven since they are built into the controller. Instead of relying on the oven, you should follw the directions on the bag. These tell you to use high power, stay by the oven and stop the cooking when the time between pops drops to 1 or 2 seconds. Stored heat will continue to pop kernels for a bit, and you won't cremate your popcorn. You'll also avoid the possibility of the bag catching fire and damaging the oven, which I have seen several times. Finally, don't expect 100% of the kernels to pop. There wil always be a few duds, and extending the cooking time just results in burned popcorn.

Jun 05, 2011 | KitchenAid KHMS2040W Microwave Oven

2 Answers

My microwave is about 5 yrs old and today it is not cooking anything. It runs, but does not cook. Any suggestions?


Put a quart of watwer in the oven, measure the temp. run it for 4 min and you should get at least 86 degrees differance in temp. If not then the magnatron has failed and needs replaced, or for the money a newer unit is a better deal.

Mar 20, 2011 | GE Microwave Ovens

1 Answer

Let me know the functions of microwave?





Sorry to read about your problem, I hope this helps you out.


Display: This is used to show the time, cook time and options you chose during you use.
Cook: Use this feature to cook fresh vegetable, frozen vegetables, rice and cassroles.
Enter/Start: This is used to start and enter any option you choice while operating the unit.
Stop/Clear: Use this function to clear or stop the unit during cooking or choosing a feature.
Reheat: This is use to reheat dinner plates and left overs. Be sure that you do not use any plastic foam or metal plates/utensils this can cause damage to the unit and may cause injury.
Auto Defrost: This is used to defrost food by weight and type. EX: If you have 1 pound of chicken, meat or fish press in the food code by using 1,2,3 and then the weight in pounds (1 pound would be 1.0 enter.)
Quick Frost: This is use with the Rapid defrosting method for 1.0 pound frozen food. If you have a pound of meat, chicken or fish press Quick Frost and it will defrost for that weight only.
Cook Time: This is to set the cook time for the food you are trying to heat or cook. Enter the time you wish to cook and press enter/start (EX: 7mins and 30 secs = 730/start.)
Clock: This is used to set the time of day. Press Clock the the time of day it is and clock again (EX: 11:00 would be 1100 then clock.)
Number: This is the key pad used to enter the cook time, clock or power level.
More: This feature is to add time to the cooking time only in ten second intervals. If you want to add time without restarting press this button to add ten seconds each time it is pressed.
Less: This is used to decrease the cooking time by ten second intervals. If you want to decrease time without restarting the time press this to decrease cooking time in ten second intervals.


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Power Level: This is use to choose the power level in which to cook or heat food or beverages. To change the default setting of 100%, press the power level button and press the level you desire, if you desire only 50% then press power level the 5 and enter/start. Hint: Change the Power level before entering the time your setting to cook
EZ-ON: This is to quickly start the power level to 100%.
Vent High/Low/Off: This is to turn the vent located on the outside of the unit during use. You have the option of turning it off, on, high or low.
Light High/Low/Off: This controls the light on the bottom of the unit if you have a mounted range above your stove or under your top counter cabinets.
Hot Water: This is used to heat water for beverages such as coffee and hot chocolate. Use Extreme caution when removing baverages from your unit, they will be hot and could cause injury.
Popcorn: This is used to pop popping corn, when placing the popcorn in the microwave press the this feature and enter/start and it will automatically start the correct time for cooking. This feature is designed for the individual packaged popcorn use. Do not place any foil or loose popcorn in the unit this could cause damage or injury.
Kids Meals: This is used to REHEAT meals for children it works at a lower power level. This can be used to reheat hot dogs, oatmeal, baby food and soup. Do Not place any metal objects or objects than can melt this can cause damage or injury.
Warm Hold: This is to keep foods or drinks warm for any length of time up to 99 minutes and 99 seconds. Although it is not a recommended to run a unit at the maxium time limit.
Melt: This is used to melt butter, margarine, chocolate, cheese and marshmallows. Do not leave these items unattended during the duration of melting time to prevent any unwanted over heating.
Soften: This is used to soften ice cream, butter, cream cheese, and frozen drinks. Do not place anything in a container that is made of foam or metal this can cause damge or injury.
*Child Lock: If your model has this feature it is used to lock the unit to keep a child from pressing buttons or causing injury.
Open: This is the handle or button on the front of the unit to open the unit after the unit is done cooking or in use. Do not open the door during the use, always press the Stop/Clear button first. Also do not remove hot items without oven mits or waiting time food is at a safe handling temperature.

Jan 03, 2011 | LG LMVM2277ST Microwave Oven

1 Answer

18 years old, microwave suddenly died


When you say that you checked the circuit breaker, can I assume you meant the one for your home? There is a fuse in the microwave. Typically it is a 20 Amp fuse. To check it you will need to open the cover. A word of warning, there are some high voltage components like the capacitor that should be discharged before working on this device. If you are not familar with electronics, then you should take it to a qualified service person.

Jun 16, 2010 | Microwave Ovens

1 Answer

Sharp microwave losing cooking power


If the supply voltage is low it will take long time to heat foods. The second reason is the Magnetron. Since it is in the warranty period you can call at the sharp authorised service center. They will do it free of coast.

May 04, 2009 | Microwave Ovens

1 Answer

Viking professional vmoc205ss convection Cooking POPCORN


You need to use one of the metal racks that came with the Viking microwave to raise the popcorn bag off the bottom of the microwave. It works great!

Apr 06, 2009 | Microwave Ovens

3 Answers

Oven turns off


Hi,

You are running the risk of damaging the Magnatron by doing this.

Check the packets you are using, you will have to reduce your power output.

This is because microwaves act by being absorbed by water. There is very little in popcorn and in fat. Once this has been evaporated, the microwave energy builds up (as it is still being produced - but not absorbed), and ends up cooking the magnatron itself.

I have seen countless posts on here after cooking popcorn!

More fun on the hob anyway - and cheaper to buy in bulk!

Jun 21, 2008 | Magic Chef MCD1311ST Microwave Oven

1 Answer

Timed Power Loss


It sounds like your magnetron is failing, but generally, the most common causes of a failure to heat are:

- bad door switches or door switch mounts
- loose connection at the magnetron
- problem or loose connection on the control unit circuit board
- bad magnetron or other high voltage part (such as a shorted diode)

If you or someone you know decide to look into it, we have critical safety information, info on door switch diagnosis and replacement, and disassembly information at our site, and our link is at our listing here on FixYa: http://tinyurl.com/yzjozk

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

There should also be a "mini-manual" hidden inside the unit behind the control panel, which is very helpful when troubleshooting.

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

Apr 28, 2008 | Whirlpool MH1150XMQ Microwave Oven

1 Answer

Magicchef over the range microwave loses display and power


It sounds like your magnetron is overheating and its thermostat is resetting.

Try it with a cup of water in one corner and see if that helps.

Otherwise, most manufacturers have a warranty of several years on the magnetron.

For info on that, visit http://www.magicchef.com/home.jsp

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

Dec 07, 2007 | Microwave Ovens

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