K3 Dust removal

I´ve just noticed yesterday that the dust removal on my K3 doesn´t seem to happen anymore
I was using my KS-2 & my K3 and the dust removal on the KS-2 is very noticeable, also says dust removal during operation.
My K3 says nothing and there are no clicks....
Has anyone noticed this?
Maybe I should do a reset?
Strange that I only noticed this now after doing the firmware update a few weeks ago...
Any suggestions?

IIRC there are no clicks because the action is ultrasonic?

In any case it's worth checking in the menu that dust removal is actually switched on. Maybe the update switched it off.

Hi John
Definately turned on...
Just can't remember if there ever was a noise...I'm sure there was and a message on screen saying dust removal....
Maybe I'm getting my two cameras confused...don't often use them at same time.

No message just a piezo action and a very quiet chirp sound

Thanks John & Steve.

Just getting paranoid and imagining things...