Hacienda Heights homes run newer than a lot of what we see on the rest of this side of the valley. The median build year here is 1968, a few years past the 1964 median for the wider service area, which means more of these garages came with the early steel sectional doors instead of the older one-piece swing-up panels. That's good news in one way: the tracks are usually standard width, so parts aren't as hard to source. But 1968 construction still means original torsion springs are long past their rated cycle count if nobody's touched them, and a lot of openers from that era's later retrofits are chain-drive units that have outlived three or four remotes. We see broken springs on doors that still look fine otherwise, because the spring fails quietly while the door, track, and panels keep working. If your door's gotten noisy and heavy to lift by hand, that's usually the spring, not the opener.