Question about GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

Cold air from outside coming in house through vent

Our vent vents out the side of the house. Now that it is winter, there is a steady stream of cold air coming in through the vent under the microwave. The inside of the microwave is freezing too. It works fine, but once the food is done I need to get it out right away or it will cool down really fast. I have checked outside and the flaps on the vent are closed and there is a cover over the whole things. Other than that, I have not had anyone look at it yet.

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • GE Master
  • 8,803 Answers
Re: cold air from outside coming in house through vent

Sounds like your damper (flap) outside is working, and that's probably the first thing to check. Wind may be also pulling the damper open from time to time. Hopefully the pipe fitting is sealed, and the pipe is insulated anywhere it runs through any unheated portion of the house. Some amount of cold air getting in will be unavoidable. The best bet next might be to look over the two pages in the installation instructions that deal with outside venting. If you don't have the installation instructions, you can get a copy here: Then if you don't notice any obvious problems with the installation, it may be time to contact the installer for their two cents.

Posted on Feb 05, 2007

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


3 Points

Related Questions:

1 Answer

When turning Fan on (any speed), top vent grille blowing lots of air, but not pulling air underneath

some microwaves vent to the exterior. check outside for a vent. If it is a recirculating model, perhaps the filters are plugged, the vent pathway is blocked (packaging material) or a loose panel at the back so that the exhaust fan air is leaking out somewhere else. I don't know what else it could be unless the fan is loose on the motor shaft and the fan motor is running but the fan blades are not moving air.

Nov 15, 2014 | Microwave Ovens

1 Answer

Cold air comes in throught microwave

check your through the wall vent .that is connected to your microwave.this leads to the outside of your home.While outside,look to see what type of cover is used.your hardware person should be more able to help you with this.

Nov 08, 2013 | Microwave Ovens

1 Answer

Freezer side of appliance is fine but the fridge side is warm

open your freezer and see if it's blowing cold air,or if it's just cold,if it's not blowing cold air it's probably the fan, u will find this right behind the vents in the freezer,remove vent in freezer there should be a fan if not running replace this should resolve your problem

Apr 03, 2011 | Whirlpool Microwave Ovens

1 Answer

Venting of microwave - house stinks of bacon

Interesting post, because I have the same problem! I have spent the better part of today researching and taking our microwave apart (partially) to inspect the top portion re: outside vent. Everytime the microwave is on, the "active vent door" (manufacturer's term, not mine!) opens. Apparently this is normal. But it also opens when you turn on the vent fan, when cooking on the stovetop. I don't like this feature, because I think it 'overrides' the outside venting system. I double checked our outside vent to ensure that when this oven was installed, the person did in fact allow the flap to be open when the fan is on (he did). So I think what 'our' problem is, is that the microwave active vent sort of interferes with the outside vent, thus more of the cooking smell being blown into the house instead of the outdoors. I was thinking of simply disconnecting the gizmo that make the active vent door open each time you use the oven and/or vent fan option however I don't think that's a good idea as apparently the main purpose of the active vent door is to keep the electronics of the microwave oven from overheating. The more I read about this version of microwave, the less impressed I am with it. Lots of electronic issues with it. I am not fussy either with having the microwave over the cooktop. Sorry I don't have a solution for your problem but I do feel your pain!!!

Mar 21, 2010 | GE Microwave Ovens

1 Answer

I had the exhaust switched from inside to outside venting, but there is no air intake. What do I need to check?

Check to see if the damper is stuck, either on the exterior vent outside the house or at the microwave. Also, did the blower get turned to point at the desired exaust direction. Unfortunately, both interior possibilities will require removing the microwave.

Dec 27, 2009 | Microwave Ovens

1 Answer

Have whirlpool gold accuwave micro hood combo model# GH51884XPS5

The inspector is correct, air should be coming through the top louvers, although you sometimes will have a little air coming from the sides and back. Drop the microwave and see which way the blower is rotated, towards the louvers or towards the back or top. Some units also have a panel that blocks the venting from going the wrong way. Good Luck, Appliance Specialists

Dec 15, 2009 | Whirlpool GH8155XJ Microwave Oven

1 Answer

Can i cover my outside house vents in the winter?

you should never cover any vents, they are there for a reason, to keep you safe from fumes, damp, etc.. (If talking about vents that are outside you home). If you are talking about appliance vents then you run the risk of them breaking if you cover the vents, due to overheating

Vents that are outside the home including boiler vents etc... exhume all of the carbon dioxide that is bad for you. Vents that are there to stop damp, if blocked may cause you to have a problem with damp in the future.

Jan 14, 2009 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

No Exterior vent for fumes

Hello kbender,
I am absilutely certain that the reason it vents inside is because it is more difficult to vent it outside.. ( which means it costs the builder more to do that) but to answer your question.. Yes, all spacemaker micros can be vented out the wall but you will have to remove it from where it is mounted and rotate the blower assembly so it vents out the back, place a blank off plate over the open area where it used to vent ( it may be there and needs to be repositioned when you rotate the blower) , then create a vent hole that lines up with the exit point of that micro.. and attach duct work to bring it outside ( depending on your siding , will dictate how that gets mounted externally and you may run into a problem witha stud on the outside wall ( a bearing wall) that wil need to be cut..I've installed many of these to outside vents and it is a lot of work.. so you may want to consider your options. If you hire someone, that's the easiest solution. You may also want to check to make sure your condo committee ( if you have one) will not have a problem with that.. or you may be able to get a group discount if you hire someone to do mulitple units..
Hope that helps..

Dec 04, 2008 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer


If this microwave has vented outside in the past then most likely a bird or something has built i nest in or on the vent blocking airflow. If its always been this way then in order for this model to vent though an exterior duct the blower motor has to be flipped so that it blows upwards and a vent connector needs to be installed. This is a fairly easy process once the microwave has been taken down but can be dangerous because there is a capacitor that holds 4000 volts that can discharge though the cabinet if you're not careful.

Nov 03, 2008 | Jenn-Air JMV8208AAS Microwave Oven

1 Answer

My Microwave vents are letting in cold air during the winter

The installation manual should help you deal with these issues. If you don't have yours, you can download it here:

As a bonus, you can also get your owner's manual here;

One important thing is to make sure you have a good vent door on the outside of the home. If that's not working right, it allows mor cold air in. Also, the pipe should be insulated.

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

Dec 01, 2007 | Maytag MMV4205 Microwave Oven

Not finding what you are looking for?
GE Spacemaker JVM1640SJ Microwave Oven Logo

741 people viewed this question

Ask a Question

Usually answered in minutes!

Top GE Microwave Ovens Experts

William Miller
William Miller

Level 3 Expert

8803 Answers


Level 2 Expert

224 Answers

D. E. Hev

Level 3 Expert

1059 Answers

Are you a GE Microwave Oven Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides