Loud noise when turntable is in use.

Had the same problem which was solved by cleaning the the entire track and wheels under the turntable. Amazing how much sound emanates from such a simple problem. Of course you should be very careful to have the parts placed correctly after they are removed for cleaning.

Read the problem folks...it going to be the motor ir plastic piece between the plate and motor or both

Hello Richard - we have the same problem. Cleaning the wheels etc makes no difference. The problem is inside the oven itself, perhaps in the motor or thereabouts. We removed the turntable and the wheels and turned the microwave on and the noise still occurred. Quite loud and annoying. Only began after warranty ran out. Sorry I'm no help - can only commiserate.

I had the same popping noise only when I put in the glass tray. I did clean it with dishwahser solution but still the same afterwards.

Only when I cleaned it with antistatic spray (same used for cleaning computer screens) did the popping sound stop.

Hope this helps, it saved me a trip to the technicians.

I have the same problem. I replaced the drive motor (~$50 part) and the noise is the same...or worse. Any suggestions?

Same problem with thumping noise in GE over the range Microwave. Visual inspection revealed nothing but running my finger around track that ring rides on located a small bump which blended perfectly with the bottom track. Cleaned the track, wheels and underside of glass turntable. Voila’ problem solved.

This may not solve your problem, but everyone has cooking spray (any type of oil will work to diagnose where the problems is) and you do not need to tear into your machine and no repairman involved. My problem was the plastic ring with wheels that goes under the turntable. The little wheels rotate on a little axle, and applying a drop of hi temp cooking spray to each wheel/axle did the trick. Now, it’s absolutely SILENT.

I had the same problem except there was no noise if I took the glass tray out. It only happened when the tray was on the turntable. After reading these comments, I checked the wheels of the turntable. No flat spots or problems there. Finally, I spotted a tiny crumb on the bottom surface of the microwave, right in the ridge where the wheels roll. It was small, but quite hard and white in color…hard to see on the white surface. I removed it and no more rattling!! So wipe out the bottom of your microwave if all else fails!

I sprayed silicone oil down the opening of spinning table plastic gripper on my Samsung microwave. Stopped the noisy vibration.

Glad I found this site. I was concerned that a motor replacement would be needed. But I sprayed silicon lubricant into the hole and canola oil onto the wheels and, so far, all is quite. Thanks to all for the suggestions, Pete

We use our microwave to make bacon for breakfast, the microwaveable cooker is so large that our microwave’s turntable cannot rotate, so after a while our microwave starting making bumping sounds when we used it.

I found your page here while searching for possible reasons online!

I did what people here had suggested, I checked for flat on spot/s roller wheel/s, found none, I wiped all the roller wheels clean, and also cleaned the track that the rollers wheel travel on the microwave.

Thrilled to report, no more bumping sounds, our West Bend Microwave is working like a charm!

I see that this is a question from 2015. Back to the future in 2022, I had the same problem, a knocking sound as the turntable rotated. With the turntable removed, no noise! I cleaned the roller track as per previous answers and the noise disappeared. Good question, correct answers! Many thanks.

This is a very helpful thread! Apparently this type of noise -- although it sounds like something terrible has happened -- is often quick, easy (and free) for a householder to fix using no tools.

In my case the glass turntable and the support ring with the three little wheels were fine, and the sound continued when I removed them.

But the coupler - that approximately 2"plastic part with three legs that engage the bottom of the glass turntable - had been pushed down and was tight to the metal floor of the oven. I pulled it up an eighth of an inch or so and the sound was gone.

Interestingly, when I replaced the glass turntable on its support ring, and pressed firmly downward, the coupler did not move back down. It is apparently designed to ride above the metal floor of the microwave with a comfortable clearance. I have no idea how we managed to drive it down against the metal.