DC motors are generally non returnable and are generally sold without a guarantee. The reason for this policy is the fact we are not present at the time of fitting and thus cannot assess the expertise of the fitter (why Dyson wont sell them to you). We expect if you are buying a motor or a PCB that you are capable of diagnosing the machine properly before you buy the part.
Lets take a look at testing the motor. Disclaimer: Testing the motor as described below is NOT for amateurs. Electricity KILLS. Seek the advice of a qualified electrician if in ANY doubt about your own skills
If you have a multimeter and know how to use it, you can check resistance across the motor terminals as you would with any motor. You can also check that the cleanerhead itself is getting an AC feed from the machine (which you should do before you even think about taking the cleanerhead apart, really)
. Many people buy replacement cleanerhead parts without even checking that, and then assume the parts they bought are faulty, and then are unhappy to be reminded that PCB's and motors are non-returnable.
If you are unsure whether the PCB is faulty or not, one way to be absolutely sure is to plug the cleanerhead back onto the machine, recline the machine and switch it on. Carefully
probe the terminals while the machine is running.
You are looking for a DC value of somewhere around 300-330v on a UK, European or Australian machine (US machines may differ, ask local advice on this if in the US or Canada)
. No feed from the PCB, but a feed from the machine tells you the PCB is faulty.
If you have that feed from the PCB, and your motor isn't running, we can conclude the motor needs replacing. To get it out of the housing, lift the retaining arm up in the direction of the arrow just a little........
Take note of where the spring sits and don't lose it.
The motor now pops out like so.
Reassembly is a reverse of strip down. While we were doing these photos, we decided to make a short video taking one apart and putting it back together again.
We stock all the parts you may need to fix your DC25. Here are direct links to our shop of what may be of interest to you if you are reading this.
- For the T15 screwdriver you need to do the job look >>here<<
- For the brushroll motor look >>here<<
- For the PCB look >>here<<
- If you need a whole new cleanerhead look >>here<<
- For a brushroll look >>here<<
- For a replacement end cap look >>here<<
- For a replacement perspex housing and cover look >>here<<
Comments and questions welcome.