Samsung Dryer making buzzing noise

[thefdo]

Electric Dryer, Electrical Buzzing Sound (with video) - Samsung Dryer DV218AEW/XAA

Help!

Recently my Samsung Samsung Dryer DV218AEW/XAA Stack-able Electric Dryer is making an electrical buzzing sound. I would like to fix it myself if possible, but will call out a repair technician if necessary. Any advice would be appreciated!

Link to the model on Samsung Website (Note: Electric, not gas): https://www.samsung.com/ca/support/model/DV218AEW/XAC/

Link to Video of the Sound: 

https://youtu.be/axW32oJAlmU

https://youtu.be/mlQaCsAQF1E

[16345Ed]

Does not sound electrical to me. Needs disassembled, inspected and cleaned. I’d be suspecting debris in blower. 
 

But belt, idler and rollers should be checked. 

[Budget Appliance Repair]

Sounds very similar to a Samsung dryer I worked on a couple months ago.

It was the idler spring vibrating for some reason - to fix it I lubed both ends of the spring hooks so they can't grip to the the metal and setup a vibration of the spring.   I also wrapped the spring coil with a piece of duct tape.

I would have preferred to use a piece of heat shrink tubing on the spring but didn't have any so went with the duct tape.  The lube on both spring hooks alone may have solved the problem.

I think I also remember seeing a post somewhere in this forum a few months back where they had to do something similar to stop a weird vibration noise.