Microwave only turns on when door is opened

Page 2 - Seeking answers? Join the AnandTech community: where nearly half-a-million members share solutions and discuss the latest tech.

sswingle

Diamond Member
Mar 2, 2000
7,183
45
91
Originally posted by: Smartazz
I just realized, this microwave is broken then. You can't cook anything in it unless it's left open. Imagine not having a microwave oven for a while, that'll suck.

You JUST realized? What, did you think that running while the door was open was an undocumented feature?
 

Smartazz

Diamond Member
Dec 29, 2005
6,128
0
76
Originally posted by: RichUK
OMG ROFL MY MICROWAVED WAFFLES

You is not a Smartazz! More like a Dumbazz.

My original user name was going to be lazyazz, much like my aim sn, but I choose this a year ago for some reason.
 

Colt45

Lifer
Apr 18, 2001
19,720
1
0
Originally posted by: virtualgames0
The stark percentage of ATOTers that are ignorant enough to think that microwaves are radioactive is shocking. :laugh:

doesnt have to be radioactive to be harmful.


and for the record. shens.
 

patentman

Golden Member
Apr 8, 2005
1,035
1
0
Originally posted by: phisrow
That is not good. Microwaves are non ionizing; but they are known to cause cataracts and tissue heating at high doses. A microwave of recent vintage is putting out several hundred watts. Don't mess around unless you don't much fancy your eyes.

Several "hundred" watts? Mine is rated at 1800W.

And yes, microwaves are dangerous for multiple reasons, not the least of which is that they can make men sterile (but probably only if you give your junk a good does of em).

Long story short, the door of a microwave has a little metal grid embedded in it. The grid is porous, but the pores are specifically sized to be less than 1/4 of the wavelength of the radiation emitted by the microwave (2450 MHz=~12cm). Because the pores are less than 1/4 of the wavelength, the screen acts as a perfect reflector to the 2.45Ghz radiation emitted. Thus, little radiation excapes the microwave whent he door is closed.

That said, with the door open, microwaves will escape from the oven to a much greater degree than is considered safe. Do the smart thing and replace it.
 

Smartazz

Diamond Member
Dec 29, 2005
6,128
0
76
Originally posted by: patentman
Originally posted by: phisrow
That is not good. Microwaves are non ionizing; but they are known to cause cataracts and tissue heating at high doses. A microwave of recent vintage is putting out several hundred watts. Don't mess around unless you don't much fancy your eyes.

Several "hundred" watts? Mine is rated at 1800W.

And yes, microwaves are dangerous for multiple reasons, not the least of which is that they can make men sterile (but probably only if you give your junk a good does of em).

Long story short, the door of a microwave has a little metal grid embedded in it. The grid is porous, but the pores are specifically sized to be less than 1/4 of the wavelength of the radiation emitted by the microwave (2450 MHz=~12cm). Because the pores are less than 1/4 of the wavelength, the screen acts as a perfect reflector to the 2.45Ghz radiation emitted. Thus, little radiation excapes the microwave whent he door is closed.

That said, with the door open, microwaves will escape from the oven to a much greater degree than is considered safe. Do the smart thing and replace it.

Well some are rated at several hundred watts, I think mine is 1500 watts. Thanks for the info, maybe I'll get one this weekend.
 

patentman

Golden Member
Apr 8, 2005
1,035
1
0
Originally posted by: Colt45
Originally posted by: virtualgames0
The stark percentage of ATOTers that are ignorant enough to think that microwaves are radioactive is shocking. :laugh:

doesnt have to be radioactive to be harmful.


and for the record. shens.

Shens on your shens.

Microwaves are not radioactive. In the true sense, "a" microwave oven is a radiation emitter, but does not spontaneously emit radiation. Rather, the emission of microwaves has to be induced by the imposition of an electric current. And even if you were talking about microwaves in the radiant energy sense, they are still not radioactive.

ra·di·o·ac·tive (rd--ktv)
adj.
1. Of, exhibiting, or caused by radioactivity.

"ra·di·o·ac·tiv·i·ty (rd--k-tv-t)
n.
1. Spontaneous emission of radiation, either directly from unstable atomic nuclei or as a consequence of a nuclear reaction.
2. The radiation, including alpha particles, nucleons, electrons, and gamma rays, emitted by a radioactive substance.
 

yhelothar

Lifer
Dec 11, 2002
18,409
39
91
Originally posted by: Colt45
Originally posted by: virtualgames0
The stark percentage of ATOTers that are ignorant enough to think that microwaves are radioactive is shocking. :laugh:

doesnt have to be radioactive to be harmful.


and for the record. shens.

It's harmful not because it's radiation.. but it's harmful because it contains high levels of energy. If someone beamed 1000W of light radiation at you.. you'd fry just like 1000W of microwave radiation. It has nothing to do with cancer/mutations associated with ionizing radiation such as gamma rays and x-rays.
 

sswingle

Diamond Member
Mar 2, 2000
7,183
45
91
Originally posted by: virtualgames0
Originally posted by: Colt45
Originally posted by: virtualgames0
The stark percentage of ATOTers that are ignorant enough to think that microwaves are radioactive is shocking. :laugh:

doesnt have to be radioactive to be harmful.


and for the record. shens.

It's harmful not because it's radiation.. but it's harmful because it contains high levels of energy. If someone beamed 1000W of light radiation at you.. you'd fry just like 1000W of microwave radiation. It has nothing to do with cancer/mutations associated with ionizing radiation such as gamma rays and x-rays.

Is reading comprehension dead? He didn't say its radioactive. To translate what he said " Its still harmful even though its not radioactive"
 

ch33zw1z

Lifer
Nov 4, 2004
39,470
20,151
146
You can find the history of how microwaves made it to the home user on the internet. They are dangerous, but do not produce radiation.
 

yhelothar

Lifer
Dec 11, 2002
18,409
39
91
Originally posted by: ScottSwingleComputers
Originally posted by: virtualgames0
Originally posted by: Colt45
Originally posted by: virtualgames0
The stark percentage of ATOTers that are ignorant enough to think that microwaves are radioactive is shocking. :laugh:

doesnt have to be radioactive to be harmful.


and for the record. shens.

It's harmful not because it's radiation.. but it's harmful because it contains high levels of energy. If someone beamed 1000W of light radiation at you.. you'd fry just like 1000W of microwave radiation. It has nothing to do with cancer/mutations associated with ionizing radiation such as gamma rays and x-rays.

Is reading comprehension dead? He didn't say its radioactive. To translate what he said " Its still harmful even though its not radioactive"

Nah.. he may not believe it's harmful because of radioactivity, but judging from the comments several posted, it's apparent that many do. And if anything, I never said it wasn't harmful. So Colt45 needs the reading comprehension check. kthnx
 

yhelothar

Lifer
Dec 11, 2002
18,409
39
91
Originally posted by: ch33zw1z
You can find the history of how microwaves made it to the home user on the internet. They are dangerous, but do not produce radiation.

microwaves produce radiation, just like how you and I produce radiation, and so does any light source or radio source.
But many uninformed individuals with tin foil hats like to believe that there's only one type of radiation, and that's bad radiation - totally oblivious to the fact that only extremely narrow wavelengths of radiation are harmful.
 

Smartazz

Diamond Member
Dec 29, 2005
6,128
0
76
I think there's something wrong with the door. I typed in a time and inserted the food and it works when the door's closed now. It's 8 years old, so I doubt it's under warranty anymore.
 

NanoStuff

Banned
Mar 23, 2006
2,981
1
0
Originally posted by: virtualgames0
The stark percentage of ATOTers that are ignorant enough to think that microwaves are radioactive is shocking. :laugh:

What the hell are you on about? Everything's radioactive; my router is radioactive, so are my testicles believe it or not.
 

PottedMeat

Lifer
Apr 17, 2002
12,363
475
126
Originally posted by: Smartazz
There's no timer going on my microwave, but when you open the door it turns on, when you close the door the light goes off and the microwave shuts off. Is this dangerous?
edit: What I should have asked was, should I cut the power going into the microwave just in case something else goes wrong with it?

Uh thats a pretty serious defect - arent there 2 or 3 interlocks that prevent that from happening?

 

Smartazz

Diamond Member
Dec 29, 2005
6,128
0
76
Originally posted by: PottedMeat
Originally posted by: Smartazz
There's no timer going on my microwave, but when you open the door it turns on, when you close the door the light goes off and the microwave shuts off. Is this dangerous?
edit: What I should have asked was, should I cut the power going into the microwave just in case something else goes wrong with it?

Uh thats a pretty serious defect - arent there 2 or 3 interlocks that prevent that from happening?

I think it's safe to say it's broken. I'm not sure if it's 220volts or 110 though. It might run on the same line as the oven does.
 

Cattlegod

Diamond Member
May 22, 2001
8,687
1
0
i doubt it is "running" when the door is open. i'd imagine they have an open circuit when the door is open.

a microwave is just a lightbulb at a different frequency range. if your hand or any other part of you starts to heat up, you are too close. You will feel the heat before it does any burning damage to you.
 

Smartazz

Diamond Member
Dec 29, 2005
6,128
0
76
Originally posted by: Cattlegod
i doubt it is "running" when the door is open. i'd imagine they have an open circuit when the door is open.

a microwave is just a lightbulb at a different frequency range. if your hand or any other part of you starts to heat up, you are too close. You will feel the heat before it does any burning damage to you.

Are you sure of this. I think the bulb and fans are just spinning when the door is openned, not nessisarily the part that generates microwaves.
 

BoomerD

No Lifer
Feb 26, 2006
65,904
14,303
146
Ignore all these naysayers...Just use your body to shield your family/pets from any stray microwaves coming from the unit, and go ahead and use it to your heart's content...


OR, just accept that it's fvcked up, and buy a new one...
 

Smartazz

Diamond Member
Dec 29, 2005
6,128
0
76
Originally posted by: BoomerD
Ignore all these naysayers...Just use your body to shield your family/pets from any stray microwaves coming from the unit, and go ahead and use it to your heart's content...


OR, just accept that it's fvcked up, and buy a new one...

It's fvcked up and time for a new one after 8 years.
 

Cattlegod

Diamond Member
May 22, 2001
8,687
1
0
Originally posted by: Smartazz
Originally posted by: Cattlegod
i doubt it is "running" when the door is open. i'd imagine they have an open circuit when the door is open.

a microwave is just a lightbulb at a different frequency range. if your hand or any other part of you starts to heat up, you are too close. You will feel the heat before it does any burning damage to you.

Are you sure of this. I think the bulb and fans are just spinning when the door is openned, not nessisarily the part that generates microwaves.

there are two bulbs in the microwave, one for light and one for generating the microwaves. I agree with what you said that it probably is the light and fat on, and it is not emitting any microwaves.

A simple way to test this is stick a bowl of water in the microwave while it is open and you think it is running. if it is releasing microwaves, it will heat up.
 

Dualist

Platinum Member
Dec 5, 2005
2,395
0
86
I'll say that it's too dangerous, even if kids get near it.

Best to stay on the safe side and simply not use a microwave that doesn't have a door, or doesn't work right like it should be.