My DC04 appears to run normally most of the time and at slow speed
occasionally. It's not due to blocked filters. It also tends to cut out
completely if I run it for too long. Any ideas what is wrong?
Typical symptoms of an intermittent shorted motor winding.
This is almost always caused by overheating due to blocked
filter or other air path blockage, possibly in the past.
Another less likely possibility is a failed motor bearing.
Which filters have you checked?
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