Diagnosis
The vacuum is overheating and entering thermal cutoff. The blinking blue charger light confirms an over-temperature event. The primary cause is a clogged filter restricting airflow.
How to Fix It
One: Immediately power off the vacuum. Two: Remove the filter located at the top of the cyclone assembly. Three: Wash the filter under cold water until the water runs clear. Four: Squeeze out water—do not twist—and let it air dry for 24 hours, minimum. Reassemble.
If That Didn't Work
A secondary blockage may exist downstream of the filter. Check the post-filter mesh inside the top of the vacuum body for dust accumulation. Wipe it clean with a dry cloth.
Heads Up
Do not use the vacuum without the filter installed. This will void the warranty and can cause permanent damage to the internal cyclones.