Water Filter Noise

New fridge only have had a couple of mnths. I am awaiting a door hinge and have not yet connected the water until the hinge problem is solved. I have the ice maker in the "off" position, yet I am getting a noise from what sounds like it is coming from the water filter in the top right hand side. I hear the compressor and no complaints, but the noise in the water filter sounds like something is pulsating or straining. Is it safe to have the fridge running without water connected?

I have gone the kitchenaid website & listened to the "normal" noises and mine is not there. It is intermittent.

Thanks;