I'm sorry to hear you're having difficulties with your DC14 Animal. The cleaner's brush control system is designed to make a ratcheting sound to alert you if the brushbar is jammed. Although you've already cleaned the brushbar, it's a good idea to follow the steps shown in our online support guide to make sure you haven't missed any obstructions in the cleaner head:http://www.dyson.com/support/help.asp?article=650&product=DC14-ANIMAL_US
This should allow you to resolve your issue without further assistance. However, if you've checked the brushbar and cleaner head are clear of threads, hair, or other obstructions, but the cleaner still seems to be making the ratcheting noise, it's probably best if you get in touch with us directly. One of our experts will be happy to run through some troubleshooting over the phone with you to identify the cause of the issue, and will be able to recommend the best course of action. You can call us free on 08002980298 (UK), or 1866MYDYSON (US). We'll look forward to hearing from you.
Dyson Online Customer Support