THP weird sound when AC is on, help needed!!!

[BBZG]

HI,
anyone had problem like in video?
Howling sound on battery side above gearbox when AC is on, when off no sound.
THP175 engine.

Link to video:
https://vimeo.com/441604911

<iframe src="https://player.vimeo.com/video/441604911" width="640" height="564" frameborder="0" allow="autoplay; fullscreen" allowfullscreen></iframe>

[DS3-NL]

Hey BBZG ,

The noise what you hear could be from your additional water pump, its located under the oil filter housing. If you remove the engine plate beneath the engine bay you can check it yourself by laying your hand on the pump and feel if it vibrates or not could be a pump which is close to be failing