Pump started screeching - repair or replace?

[aquarium]

Mine squeals for a couple minutes when really cold, freezing or below, but then quiets down. Been doing that for years.
Al

Thanks,

This has just started with a little cold weather (for central Texas) so I think now I'll give it some time and see what happens.

[Poconos]

Yeah...give it time and as long as it shuts up don't sweat it. A friend has maybe the same pump that has been making a loud noise all season...started last season. My brain says it should have died long ago as no bearing or seal should make that much noise and last. However...other than the obnoxious noise it's still going strong. In late Fall and early Spring before I de-winterize I use an old Jacuzzi pump jury rigged to get the jump on circulation and also use it to pump stream water any time I need high volume flow for filling or whatever.
Al