Dashboard noise

Ihave a looping noise that comes from my dashboard when I start the car

Can you be more specific?
I don’t know what a “looping noise” sounds like.

True, don’t know the sound “looping” either.
In this media of the written word try multiple descriptions perhaps. It’s hard to describe a noise in words so use many.
Does the sound stop after a while or continue ?
What, if anything, is malfunctioning at the time ?
Where in the dash ? high, low, left, right, middle ?

I’m guessing blend door motor making many attempts to operate, or the sound of water through the heater core.