AC motor replacement
https://astro-wiki.win/index.php/Key_Considerations_for_Air_Conditioner_Installation
When the AC motor in our HVAC system started making a grinding noise, I knew it was time for a replacement. I found a compatible unit with the same frame size and power rating, which made the swap straightforward. After shutting off the power and carefully labeling the wires, the installation took about an hour. The new motor runs much quieter and the vibration is gone, so the repair was definitely worth the effort.