Tacx Flow Smart started making noise when spinning up.

Same here. See vid. Sounds like something stuck in fan but cant find it :/

my trainer: https://vimeo.com/548806432

someone else's trainer: https://vimeo.com/462315264

could this be the bearings? 

someone on youtube suggested screwing on the little metal part that the wheels connects to

see here (last faq / image with the holes - it says to put powerful glue there) - anyone did that? support.garmin.com/.../

I opened the casing, could not find what is causing this...  my neighbor is very unhappy with this noise

Also note the strategic cooling fan bolted on with duct tape ;) the poor thing overheats on long climbs in zwift with high watt / low rpm

any hints would be appreciated, I really cant afford a neo2t 

I have the same issue. Put thousands of miles on the turbo over lockdown and it’s now measuring around 85db. I’m anticipating complaints from neighbours 

Check the resistance unit casing which is in two parts with tabs holding them together, the halves can become misaligned if knocked or handled and only a slight misalignment will cause a loud noise then the unit turns

I raised a case with support - they are offering me a resistance unit (motor) replacement at ~80% of the new price (the trainer is outside warranty at 3,5 years). Not happy, but still better than any of the alternatives

lets see how this plays out