motor starts and stops when trigger is pressed

"Hi @audiq3 ,

Here is a link from the Dyson DC56 troubleshooting guide that describes what to check when you experience the problem that you are having."

"I had the similar problem and fixed it through removing the nozzle at the front and cleaning it out. There were leaves and dirt stuck in there, and once cleared it worked perfectly once again. Make sure there’s not dirt or debris stuck elsewhere in the canister.

Another potential fix is to remove the air filter between the handle and the canister, shake it out (or wash, wring, and air dry it completely), and then flip it top to bottom so the tab at the opposite end is facing down (the side tab and “faucet” graphics will still face out as before). This didn’t solve my problem but might fix yours.

A third possible fix is to replace the battery. However this is a costly replacement, and my battery has lasted many years without any problems, so make sure you follow other troubleshooting tips first.

Update (11/21/2018)

Another helpful resource is this video guide to disassembly and cleaning of the DC56:

https://www.youtube.com/watch?v=KFj2eefV..."

"https://youtu.be/ZXioUi_-NPw

see this YouTube video. make sure u remove the whole net and clear all the dirt inside"

I had this problem and had tried everything taking it apart. However eventually I noticed a little flap just inside the head of the hoover when you take off the stick and look in the hole. This little flap keeps getting stuck. Cleaned this out and now it’s perfect. Moisture just builds dirt on it and it keeps sticking.

I thought I had cleaned EVERYTHING and it was still pulsing. As I was about to give up and think it was just broken, I pulled out the long filter (the small cone-shaped one) and it looked clean on the outside, so I didn’t think that was the problem. I tapped it against my garbage and realized a ton of dust was trapped inside. Banged it on the trash can several times and VIOLA it’s working again!