Top front vent keeps opening and closing while fan is running
We have the micro vented to the outside. Do we need to have the front vent operating?
Since it is operating, is it supposed to open and close while fan is running? It did not do that when first installed. It only started opening and closing within the last two weeks. Prior to that it would open when we turned the fan on and close when we shut the fan off. Now it does not always close when we turn the fan off.
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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!!!
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
You will have to remove the micro wave from it's mount. Once you have it down, look at the top of the micro wave. There will be a panel that you will have to move from one place (where it is now) to another. This panel will either be on the top of microwave or if the mounting kit has a top plate, it will be on it. The panel normally has two screws holding it in. When you remove it, you will need to re-install it so that it blocks the air flow from coming out of the front. There should already be screw holes where you are to install it. When you have it moved, re-install the micro wave.
I hope I didn't confuse you. The only reason it's not blowing out the top is because whom ever installed it didn't move the panel. All over the stove micro waves come with this movable panel so you can vent it either way you want. If you have the installation papers, it will explain this better. Good luck.
It could be that the filter elements are clogged and need to be cleaned. Remove then from the underside of the micro hood and clean them using a good quality cleaner, such as Simple Green. Clean and allow to air dry before reinstalling.
While the filter elements are out, you can check for obstructions and run the fan to see if it is better without the filters installed.
If there is no noticeable increase in the air flow, it is possible that the exhaust vent baffle was not installed correctly, when the mircrowave was first installed.
Hope you found this Very Helpful and best regards!
Some microwaves have a adjustable fan. We have one that you can vent out the back, the back top or through the front top filters. The latter is what it sounds like you have. If you take the small back panel off and lift out the fan motor you'll see that you can place it in the direction you like.\\
When the unit begins the never ending opening and closing cycle, turn the vent fan on for a few seconds and then turn the fan off. This seems to stop the active vent from opening and closing. If this is GE quality, this is the last thing that I am going to purchase. GE refrigerators are garbage and now I am having problems with a new microwave oven.
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..
Your vent flap could be taped or it could be faulty installation not allowing the vent to open. If you take the front vent cover off, you should be able to reach in above the fan unit and gently push the vent flap up, it should move freely with no binding. If it doesn't it is taped or blocked. If it is taped, gently putting upward pressure on the flap might release the tape. If that doesn't work the vent installation is blocking the flap. You might have to remove the unit from the wall (two people to do this) or disassemble the vent duct above the microwave and rework the interface for clearance.