|Noisy fan from persistent sounds to changing pitches
- Replace the brushless DC motor. The bearing in the brushless motor suffers extra wear due to an unbalanced fan rotor assembly by design (shoddy plastic molding?)
- Replacement brushless motor is the Shinano LA034-040NN07A and can be found on ebay, comes complete with connector
- Loctite, screwdriver kit with star bits, a small adjustable wrench (to take off off a nut holding the rotor to the motor shaft) and basic ability to remember how to reassemble required
- Work with the fan unplugged from the wall and only work on the top half (the part with the filter). There is absolutely zero reason to get into the bottom of the dyson containing the electronics.