The Sonicare device is dynamically balanced to function with a brush head in your mouth. In some cases, the handle may be very loud without a brush head. Also, as brush heads wear out, they may start to produce more noise. A noisy handle may indicate it is time to replace your brush head. However, with a new brush head is attached, the noise level is normal. This change in sound does not adversely affect the device performance.
Place a new brush head on the handle and turn on. This should alleviate the noise. If not, please call the Philips Call Centre.
Was this document helpful?