It's a song coming every few hours from our garage. Only thing capable of making noise in that part of the garage is our Whirlpool upright freezer (WZF56R16DW00) or our very turned off weekend car (and I already checked with the service dept - no such chiming song is made by this car).

It's a 7 note chime. Like a song.

Totally random times.

Pretty loud. We actually hear it in the house. Though one day I was sitting IN THE CAR and heard it.

Everything in the freezer seems fine. Freezing well. No buzzing, motor noises, extra heat, red lights or beeping, or any sign anything is amiss with the freezer itself.

Any ideas? Thanks in advance.