When i connect the Spark with usb cable on PC  and Assistant 2 is running, the internal cooling fan does not work. In a short time the temperature becomes very high. I turn it off and than i turn it on again but the Spark switch off automatically . I think the temperature probe switches it off.
I must wait five minutes for turn it on again.

Does the fan run when you are not connected to the pc?
If not then you have to send it back.
A shut down during flight wouldn’t be great.

The fun run when the spark is not connect to pc.In P4 the fan work every time.

Zerohack Posted at 2017-7-11 07:56
The fun run when the spark is not connect to pc.In P4 the fan work every time.

The fan of my spark runs also when not connected to the pc.
Really strange.