Hello guys,
When i turn on my phantom 4 a quick sequence of full speed fan after stop and about ,maybe 10 second the fan turn on agaîn and never stop.
I ll try the night for the temperature around 10degres And turn on after 2min the fan turn on again and don t stop.

I try another phantom 4 in the shop and doesn t do that.
What about yours?

Thank for your help

I am in the UK with ambient temp around 20-25C at the moment and my fan comes on after P4 start-up and stays on. I have not noticed it go slower or faster at all and the noise from the props disguises any other noise once flying anyway. I think you are OK, but I only have experience of my own P4.