Philips Sonicare DiamondClean 9000 Troubleshooting Manual page 9

Brush head not attached properly
Reattach the brush head. Make sure that the brush head is well placed and not loose or wobbly.
A small gap between the handle and the brush head is normal. This is needed for vibration.
Brush head is worn
If you have used the same brush head for more than three months, you might need to replace
your brush head. As brush heads wear out, they may start to produce more noise. We
recommend replacing the brush head every three months.
Use authentic Philips brand brush heads
Counterfeit brush heads may make more noise than genuine Philips Sonicare brush heads. We
recommend you use genuine Philips Sonicare brush heads. You can buy these from our online
shop.