Dyson fan developed a low whining sound from the lower section (motor

"Out of the box, my Dyson TP01 had 2 sounds going on, a high-pitched plastic squeak and a metallic rattle like a bearing going out. Customer service were idiots and could only send me links to videos showing how to clean the exterior. This was after multiple attempts to get them to do ANYTHING.

I tore the fan down and found the plastic squeak. The motor sits in a ball (visible from the top) on foam (underneath only visible after completely disassembling) and there is a ring around the top of the motor cage with 4 flat spots that sit loosely on top of flanges from below. Adding some small strips of foam insulation tape between the motor and the ring stopped the plastic squeak.

I also ended up taking the whole thing down to the motor and while spinning with a drill, I added small amounts of synthetic grease to lubricate the motor bushings. This stopped the metallic rattle and the fan is super-quiet now."

I 100% solved the hissing/rattling noise. https://www.ifixit.com/Guide/intro/97878

What causes the Dyson hot cool fan to whistle while waiting to blow heat

Thank you for this write up. Mine has been making a high pitch noise that is so annoying.

"We have a Dyson hot and cool floor standing van with the top half being an oval air blower (front) and intake (back). The blower/intake inside dimensions are about 32 cm high and 9 cm wide. It is about 3 yrs old and has been pretty good. It has developed a fairly loud vibration sound which makes it necessary for people sitting near it to talk more loudly and to turn up the tv volume.

I found a way to make it much quieter. The vibration seems drop down by around 80% when I lift up the fan by top of the hollow oval opening that allows air intake and air pushout. I found that if you use a rope or plastic cord (e.g., screen spline about 6 mm thick) to hang the top from the back of a heavy chair or table top or floor stand of any type, it is much quieter. Obviously this is not an elegant solution, but it is inexpensive and works. The object the fan is tied to must be heavy enough to support the weight of the fan. You can test this idea by just picking up the vibrating fan by its top and seeing if it runs more quietly. I’m guessing that when the fan is resting on its base, gravity pulls down some of the weight of top 80% the fan onto the top of the components of the bottom 20%, pushing them together, leading to the vibration. Suspension from the top avoids this pulldown of weight onto the bottom."