On a house built in the low-to-mid 1990s, the tell isn't usually a snapped spring - it's the door getting heavier to lift by hand, one corner sagging half an inch lower than the other, or the opener straining and reversing partway up. That's the spring losing tension gradually as the door approaches 30 years old, which is where a lot of Covington's stock sits right now.
You'll also see track wear that shows up as a door that rattles going up but runs quiet coming down, or rollers that have flattened on one side. None of that is an emergency by itself. It's a door telling you it's on borrowed time, and on a door this age, replacing the spring alone often just moves the failure point to the next worn part - the opener, the cable, or the track - within a year or two.