hvac

So, my wife (and I do so love her) jam packed the freezer of our top-freezer Kenmore fridge/freezer again, blocking the vents, and caused an ice jam which took out the motor that circulates air in the freezer. I've replaced the motor and tested it.. everything works.. but in the process I had...

Any HVAC experts here? The 24” x 16” steel air return grille on my HVAC system makes a high-pitched tuning fork kind of noise. I’ve always tried to ignore it but it’s getting really annoying. It’s absolutely 100% the grille, not the system. Googling suggests it could be insufficient return...