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low whining sound from the lower, motor area of our otherwise wonderful fan. Please give info as to what we should do here. open and repair ourselves or send somewhere to have it fixed.
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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.
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Thanks so much.
Could you explain how you lubricated the motor? Ive gotten to the motor, but read that you shouldn't unscrew the single nut holding the fan in place and can't see where I would put grease.
[split into 2 posts because of the character limit]
To remove the fan blower assembly:
They use some pretty hefty threadlock, but you can move the nut enough to slowly remove it. Use a screwdriver in the slot on the opposite side of the armature (motor shaft) then with a wrench (I forgot what the size was) to remove the nut. The blower/blade assembly is pressed on and needs a puller. With the motor off the ground, I used a couple small pieces of wood to brace the back (motor side) of the blower and tapped the motor shaft with a punch until it was off.
To lubricate the motor bushings:
I wrapped the shaft in a paper towel and fastened a drill so I could spin the shaft (didn't need to fasten the motor housing to anything as it spun freely, but you can steady it with your hand). While tilting the motor so lubricant can drip down the shaft, I had the drill going pretty fast and added small amounts of synthetic grease (I used amsoil spray grease) while watching it get sucked into the motor bushings. As soon as the grease disappeared, I tipped the motor so excess would drip back down the shaft while it was spinning (to keep a bunch from going past the bushing and into the motor windings). I did this about 5 times on each end of the motor and never had any grease come back out, but I felt there was more than enough to last a while.
Reassembling everything was just as easy as pulling it apart and haven't had any high-pitched rattles at all in the month or so it's been running non-stop. The first time it got turned on my wife even noticed how quiet it was. :)
Thanks for this. I followed your instructions, with less fear I must say, and got down to lubricating the motor shaft with a couple of shots of Jig-a-Loo spray and voilà! Back together and as good as new!
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Try to clean the blower section of the fan. Dyson fans are notorious for getting clogged with dust at the bottom section and the turbine blades. This may be causing the motor to work extra hard resulting in the noise
I have posted an article on how to do this at the following link:
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requires special tool most people don't have..
The OP didn't specify the model, but if it has a filter like the TP01 then there should be no dirt getting inside the fan, only on the exterior and in the filter (which obviously if it is dirty will cause the fan to heave a bit as it tries to move air), but at least for the tower fans (TP01 specifically in my case) there are 2 other distinct noises caused by other issues outlined below.
From the link, I can see the AM07 has an updated design and foam on the retaining ring to stop the plastic squeaking I mentioned in the post below.
I followed this guide for our TP04 fan that has whistled at low speeds pretty much since we bought it four years ago. I found this disassembly guide useful:
https://www.manualslib.com/manual/237892...
There are a few steps not covered. The black motor carrier casing is secured by the three tabs. I found this a bit of a pain to put back on but there’s a notch which lines up with a raised bit on the other part. Obvious when you realise. Likewise re assembly of the motor and carrier into the cylinder is super fiddly and took a number of attempts but you just need to line up the push in tabs with the holes as best as possible and just try and keep it straight/level as you insert it back in to keep the circular bits of plastic and springs in place. Once in place then you can start connecting the wiring back up.
I used synthetic grease on the fan blade shaft and as others have said turning it a few times works the grease into the motor. Lastly, I initially tightened the fan nut fully but you do have to back it off a little bit otherwise the fan won’t spin freely. The thing is whisper quiet now.
Thanks to those who posted the lubrication fix
@simondriver Hi Simon! This is absolutely helpful! Do you have pictures showing every step? I am confused to where it would be best to put the grease at on the fan blade shaft. Did you put it on the outer part of the blade or near where the nut is at? Also what is a good recommended product of synthetic grease to use for this type of turbine blade? I have a TP07 that is nearly the same as the TP04.
Hi Ezra. I didn't take photos unfortunately but it sounds like you might need to dismantle it a bit more, possibly? You need to remove the nut and pull the fan blade off the spindle (it will be a bit stiff but it does come off). To access this, you need to take the lower casing off which is held on by the three tabs. It is a bit fiddly. Then, when the fan blade is off just apply it to the bottom of the spindle and turn it so it works its way into the motor housing.
I used silkolene rg2 grease but only because that's what I had in the garage. I'd probably go with a lithium based grease.
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I 100% solved the hissing/rattling noise. https://www.ifixit.com/Guide/intro/97878
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Hi Paul, Thanks very much for what you took the trouble to write. I will study it carefully and try to follow you helpful advice. I got confused and failed to check properly, so it's good that IFixit prompted me to act. I'm not sure how to award you points, or whether I can do that, but if there is a way I'd like to award you the maximum of points allowed for a solution, because you obviously dug to the bottom of this very challenging problem and have come up with a solution. Thank you very much. - Ned Noel
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What causes the Dyson hot cool fan to whistle while waiting to blow heat
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Thank you for this write up. Mine has been making a high pitch noise that is so annoying.
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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.
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That sounds like the plastic "ball" the motor is housed in vibrating against the plastic "chines" that rest against the top of it. I used a similar technique to troubleshoot where the squeak was coming from, I would pick up the fan by the top housing and smack it on the ground and the squeak would stop for a while. I didn't know it at the time, but it was pushing the motor unit down and away from the plastic "chines" above the motor (which was designed to "float" without hitting the plastic above it, but the foam on the underside of the motor housing pushes the motor up against the bare plastic where it vibrates and squeaks). The easiest way to solve the squeak (if this is indeed your issue as well) is to put small strips of foam insulation under the 4 plastic "chines" that come out toward the center of the motor. To do this you should be able to press down on the motor housing gently to open up a space to slide foam in.
Thank you anonymous for taking the trouble to write all this. I will study what you wrote and try to use it. - Ned Noel
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