Should my microwave get hot underneath - Microwave Ovens

Sounds like the vent to the outside is rattling or not secure or the door seal is not sealing properly. let us know Bruce if you need parts or anything else. thank you and leave feedback

Anthony, I have purchased what they call wave guide material from a company called QB Products. You can try Google to find if there is someone close to you that might have what you need. Catalog that I have is old but the number for the smallest size they list is 40QBP1012. That is for a piece 10" x 12". Hope this helps you. Make sure that when you take out the old cover that you clean the area underneath because what causes the burning is grease and food particles that get splattered up there and they get very hot and start causing the burning that you see.

hi.
not sure if this link will help you out but have a look.
Whirlpool gold accubake microwave exhaust fan making racket Google Search

After heavy use, ie jacket spuds or defrosting a lot water moisture will develop, cure for this is to wipe down after use

then the problem is somewhere in the high voltage part of the microwave. The first failure suspect is a high voltage diode (#50 on the break down diagram).

If you are going to do it yourself, be very careful and discharge the high voltage capacitor first.

Check the coupler and the turntable motor as described in the previous reply.

There is a separate motor for the top grille. If you can hear the motor running then the problem is with the grille itself.
Professional appliance repair in Los Angeles, California.

Hi,

As long as the oven's metal bottom is sound underneath the rust, there isn't a problem. The cooking chamber walls are so thick and highly conducting that they reflect the microwaves extremely well even when they have a little rust on them. However, if the metal is so rusted that it loses most of its conductivity in the rust sites, you'll get local heating across the rusty patches and eventually leakage of microwaves. If you're really concerned that there may be trouble, run the microwave oven empty for about 20 seconds and then (carefully!) touch the rusty spots. If they aren't hot, then the metal underneath is doing its job just fine.

Thanks.

underneath the deck is a geared motor that turns the platter. check for non lubricated bearings or slipping gears.

check blower fan, and maintained gap between oven and wall at last 2 feets. some heat comes to pad very heat may be some prolem. check every thing and reply me.