Lg over the range microwave not venting

Hi, the rollers on the support mechanism has residue, try cleaning the rollers and the track it follows, should resolve the sound problem

Ithnk you must check yo switches if there are still working fine but ithnk it may be the pc board faulty

Needs to be properly vented to outside the house. Only install a microwave that's designed for over-stove use in this space.

This moisture can accumulate from certain types of cooking (lots of boiling) in the microwave or in extreme cases, from a blocked grease filter or exhaust vent duct.

Spills or large amounts of accumulated moisture should be wiped off. Minor amounts can dry out by themselves easier if you leave the door open after cooking.

Also, when boiling on the stovetop, you should always use the hood vent exhuast fan to keep steam and grease out of the controls and the door area of the microwave. I always recommend using the vent fan with any cooking on the stovetop.

As long as it is not rusting the metal mesh screen or other parts of the door, it can be allowed to dry out over a period of days with the door open.

If it is a convection microwave, using the convection heat will help it dry.

There is a wire mesh filter and a carbon filter on the under side of the unit. IF they are plugged then it wont draw air. The other issue is this unit has a dual option for installing the fan. One is to vent to the outside and the other is to vent to the inside, if the fan is not installed for the correct usage, you have no airflow either.

Every over the range microwave has a vent on it that should be venting that steam. I don't know of anything you could put under there that would solve your problem as that is where then vents are and they would be blocked. It sounds to me as though your steam is not being vented properly, and this could also happen if the steam is being vented back into the room instead of outside as many OTR microwaves allow you to do. Its a little bit of work to vent it outside but I myself did that with my microwave and have never had a steam accumulation problem.

We have the same problem with our lmvh1750st lg brand, there is 5 settings and alot of noise and airflow out the top. Very little from the bottom actually seems to go into the vent. We are very disatisfied with this and find during normal cooking we have very little help from the vent hood.

Right, that would be MCO10UW and the owner's manual is here.

The owner's manual does say this, of course,

"To prevent overheating from taking place, the exhaust
fan is designed to automatically turn on at a low speed if
excessive temperatures occur. Should this happen, the
fan cannot be manually turned off, but it will
automatically turn off when the internal parts have
cooled. The fan may stay on for up to an hour after the
range and microwave oven controls have been turned
off."

That;'s standard on microwaves.

But these models do have a separate internal cooling fan (which should run any time you microwave) plus the hood vent exhaust fan, which should only run when you select it, or if there is an excessive stovetop or under-hood temperature.

So if it comes on whenever you microwave, that is incorrect.

When that happens, it's usually a defective vent thermal switch (a.k.a. hood TCO).

But since it's brand new, I would certainly contact Magic Chef about this. If it's in need of repair, they will fix it free, assuming the oven wasn't physically damaged.

For more help from Magic Chef / Ewave see here or their contact page.

For Magic Chef in Canada call 866.587.2002

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

The fan pulls from the range top and either out those vents on top unless there is a vent in your upper cupboard. Then it is vented outside. Hope this helps.