A maintenance visit isn't a repair, so in most cases the door stays usable the whole time we're there - we're lubricating, adjusting, and inspecting, not pulling the door off its track. If the visit turns up a spring or cable that's close to failing, we'll say so on the spot, and that becomes a separate repair conversation rather than something we start mid-visit without talking it through first.
We don't have a fixed response window to publish for Haltom City specifically, since the truck comes from North Richland Hills, four miles away, rather than a branch in town. What we can say is that a maintenance visit is scheduled as its own appointment, not squeezed in after an emergency call, so you're not waiting behind someone else's broken spring.