Over the past few weeks, the water circulation has been fine (or at least unchanged) yet the noise output (particularly, the tone/quality) is pretty bad. Before, you could tell it was running if you in the room that overlooks the equipment; now, you can almost hear it from the other side of the house (a good 35-40 feet away).
Short of posting a video so that you can hear it, what should I look/listen for? How do I tell if it's just the motor (vs. the pump being fine)? And, what's the worst case scenario if I continue to operate as is for another few weeks - motor burns out and has to be replaced? Any concern about the rest of the equipment/plumbing?
Thanks for the initial thoughts.