There are lots of reports of the DC16 only running for a short period and then shutting down. I've seen the recommendation to bypass the Hall Sensor, and also multiple reports that that doesn't always fix the problem. I've tried replacing the battery and that was helpful for a short time, but then the same problem returned.
I suspect the setting for the voltage drop from the battery is set too high. The motor still runs at full speed even though the cut-out comes into play, so I think it was probably a Dyson error on the original circuit board specification. I'm pretty sure that the later hand-helds don't suffer from the same problem, so probably Dyson realised that this was the fault because, for a while, they replaced the entire head unit (but they obviously don't want to keep doing that for everybody).
So, as the body on the later hand-helds is pretty much the same as on the early ones, and the motor seems to be exactly the same, is it possible to replace the early-type circuit board for one from the later version of the hand-helds? If so, does anybody know the model number or part number?
I have called Dyson but they just put you through to a 'Sales' call centre and it's impossible to speak to anybody who is actually familiar with internals of the product. These weren't a cheap item and I don't think it's reasonable when the whole of the unit is perfectly serviceable that Dyson can just say "We don't supply parts for these any more" and you're supposed to accept it. I'd appreciate any comment that anyone is able to make.