I picked up a non-working Dyson DC16 at a thrift store for 15 bucks
It runs for 1 second and then the red led light flashes and it cuts off... I've taken it apart and cleaned it completely and removed the hall-effect device and permanently bridged the device so the unit thinks the filter is fitted, even if it's not... I thought that this would resolve the issue, but it didn't... I ordered a new battery and it will be here in two days.
I was messing with it and discovered that if I cover the brush end with my hand the vacuum works fine, it's only when I remove my hand that it cuts off... has anybody ever seen anything like that? Any ideas? It's like it requires constant pressure to stay on.