Many of the newer high speed, high efficiency, compressors have a high pitch sound to them. They tend to quiet somewhat after a couple weeks of running. So if the tech says it's normal and will quiet down with run time that is a correct statement.
It could also be a tubing vibration that the tech should be able to isolate.

Thanks, Jakvis.

The Viking repairman came today. We isolated the noise to the compressor, but he says the high-pitched humming is a normal noise for a compressor. I asked him why I've never heard any other fridge make that noise before, he didn't seem to have an answer. My friend has the identical model. I'm going to her house this week, and I can see if she has the same noise, but I'm pretty positive she doesn't.

I told him I'd wait a couple of weeks and see if I can live with it, or see if it gets better like you suggest. If it doesn't, the only way I'm going to be satisfied is if they replace the compressor. I hope it doesn't involve a big process to convince Viking to replace it.

Thanks again!

You can check out your friends refrigerator but remember that different kitchens have different accoustics and the sound levels will be different.
As I said, Give it a couple weeks to break in and it will get quieter.
I really don't recommend replacing the compressor unless it's a last resort.

Some compressors nowadays are of a different mechanical design than in the past ... thus difference noise profiles.

Okay, thanks Javis and Dadoes.

I'll definitely wait it out for at least 2-4 weeks.

I'm figuring you don't recommend being too quick to replace the compressor because that can lead to other problems?

Thanks again.

Replacing a compressor is "major surgery," not something to be done lightly.

lol, gotcha :)

Replacing the compressor is like doing a heart transplant Try to avoid it.

Holy mackerel. Point taken ;-)

I have a much older Viking fridge. Also noisy since the beginning. I might consider a buy-back and go with Liebherr which would be silent.

Hi Rococo,

Do you have the high-pitched sound?

I'm not familiar with the buy-back. How does that work?

Thanks!

Mine is like a low buzz and appears to be the fan. But it's always been noisy -- we can hear the fridge from upstairs. Best to email me. Jane

Buy back only occurs when you can convince a manufacturer that you have an unrepairable lemon - it's not something they're anxious to do - they'd much rather try to repair your item.

Did this end up resolving with your refrigerator Madeline616? We just had our viking fridge installed this week and have a similar noise that is driving me crazy so far!