I noticed when I went outside this morning that my pump was not on. I tried switching it on using the maintenance overide button by the pump and rather than starting right up it made a loud BUZZ. Some might argue it is more of a hum, but it's a pretty loud hum or buzz. Is it possible the impeller is stuck on something and there may be a chance I can take it apart and fix it? Or, is this the buzz of death - time to replace. It's over 10 years old, but I'm out of $$$. If the latter, based on the picture, can anyone give me a ballpark guesstimate of what replacing it might cost?