Soft helicopter sound at stationary

[Mike Bulpitt]

Hi all. Am new to Lexus,  new to hybrid so basic question. When vehicle is  warmed up and having pulled up at say traffic lights, stationary and on EV there is a strange sound which I thought at first was a helicopter hovering above us but it was coming from the engine department. Is it something to do with the recharging process? It not loud but different from my old Qashqai diesel. Hope someone can help and thanks.

[dutchie01]

it is not loud but sounds a bit like a helicopter hovering above you?

it could be the electric motors you hear they give sort of whining sound but you wont hear them when stationary.

[Mike Bulpitt]

Thanks. Not sure of etiquette as a first timer but thank you anyway. Mike

[NemesisUK]

The only thing I hear when stationary is the a/c fan.

[Mike Bulpitt]

Got it thanks. Think it's  terestial

 sound! Mike

[Mikeyb999]

Try turning the a/c off and see if you can still hear it

[Mike Bulpitt]

Will do and thanks. Mike (also known as Mikeyb!)

[javadude]

Ventilated seat fan?

[Mike Bulpitt]

Thanks for this. Haven't had this on at all-British weather!

[rayaans]

You don't have the active sound control on do you? 

[Mike Bulpitt]

Sorry, should have said I have a Premier-no active sound control but thanks for the thought. Much appreciated.

[Vince Donald]

I've got an IS300h, when stopped like you say, you have a continuous fan which is the ventilation fan blowing the air into your cabin.

You may keep hearing another fan stop and start every few seconds or so, this appears to be the AC 'chiller' unit which would normally run off the ICE but on the hybrid is electrical. 

If you press the AC button to turn it off, you will find that the second sound stops.

 

Vince

[Mike Bulpitt]

Thanks Vince. This sounds promising and makes total sense. Will give it a go when I'm out today. Much appreciated. Mike