If the door grinds or chatters on the way up but the opener sounds fine, that's almost always a roller problem, not a motor problem. A door that hesitates at the same spot on every cycle usually means a roller has flattened and is catching on the same section of track each time. Scraping metal-on-metal, especially right after a cold snap, points to a bearing that's seized rather than just worn - cold tightens tolerances and makes a marginal roller fail outright. With median household income in this area running well above the regional figure, we see more owners catch this early and call before the door jumps track entirely, which is the cheaper outcome every time. If your door is dead quiet one day and grinding the next, don't wait on it.