The Microwave as a Stove Top

Never use a microwave as a stove top. Why? because it gets full of shit and in a couple a years at most depending on how much you cook or heat up both on the stove and in the microwave. When i moved in here @March 2010 it was in the same position, i took it apart as i did today and put all the smaller parts in the dishwasher which by the way was in a similar state, and i cleaned the rest of it and put it back together. Didn't pay attention to the fact that by design the air from underneath doesn't go directly through a fan to the exhaust but through a labyrinth of ducts impossible to clean. And there is back flow from design with not enough sealing of the joints, besides the back flow at the joint with the exhaust. Never thought it was so important.

After washing just to show lack of sealing. There was no seal or gaskets on the high pressure side just the box itself in top of the fan housing sitting at an average of 1 mm distance after carefully tightnening all screw. By the way, the top of the box warps under weight near the two bolts that it hangs from under the the cabinet.

The last piece of duct of the high pressure part slides too easily in place with a play of mm. In the left side there was a big back flow both in front and rear. In rear you can see the stain on the wall. In front it was coming through the middle area of the upper grill (not shown in any picture) where was a large area of dead space  and in the room just above the stove where we were cooking. All cooked food was spiced up with up to 2 years old stuff. That combined with ohter factors were contributing to making me sick. You couldn't feel the smell because every time you start the stove there is a few seconds of smell from the spiral heaters until they heat up because they get sprinkled with tiny droplets of oil that cannot be washed and you mostly don't see.

Even if the microwave was new it was the same. I washed this one up two years ago as i said in the beginning. It was clean like new. Like right now. But it has a bad design and the whole concept of putting it in top of a stove is idiotic.

Ok  8/5 1:50 PM. While trying to install an extra fan in the duct i discovered the one way valve in top of the black square box in the picture above was only opening about 1/4 because it was hitting the adapter, visible above the oven in the cabinet in the first picture. Because of the misalignment with the duct they used an asymmetrical adapter. The curve at the corner is preventing the rectangular piece of aluminum that makes the valve to open all the way. Probably depending on how much you push the adapter in. When i removed that valve the flow grew a lot bigger. It probably wouldn't have back flowed that much.