They stopped making things that last when they realised we stopped buying them when we had one that kept working.
Maddening isn't it? We have a freezer- we've had it 35 + yrs now, and bought it used so we don't know its actual age. It has never needed servicing.
When it dies it is doubtful we'd ever find another with its longevity.
We ended up having to order a replacement tube for our vent. Thank you for all the suggestions. :D