How Local Conditions Play In
Phoenix sits in a severe heat band, and that changes how a garage door ages compared with almost anywhere else. Steel panels expand and contract every day, torsion springs cycle through more thermal stress than the same spring would see in a mild climate, and the nylon rollers on a lot of 2000s-era doors turn brittle and crack years before they'd fail somewhere cooler. Opener logic boards mounted in an unconditioned garage take real damage too - heat is harder on electronics here than moisture is in most other places. If your door was installed when the house was built sometime between 1979 and 2007, the hardware has already logged a couple of decades of Phoenix summers, and that matters more than the calendar age suggests. This is also why we see springs go on doors that otherwise look fine: the spring doesn't care about the paint, it cares about cycle count and heat, and both have been working against it here for twenty-plus years.
The Common Mistake
The mistake we see most is homeowners treating the whole door as a single unit when only one part of it failed. A door built in the early 2000s that won't open is usually an opener problem, not a door problem - the gears in a chain-drive unit wear out well before the door panels do, especially with the extra heat load on the motor housing. Swap the opener, and the door itself, with its panels and track from the original build, is fine for years yet. The reverse mistake happens too: people replace an opener two or three times on a door whose torsion spring or bottom bracket is actually what's failing, because the door still seemed to move when they pushed it by hand. The specific part that failed on a 1979-2007 door - spring, opener, rollers - tells you what to fix. Replacing the whole system because one component quit is usually the more expensive path, and on a door from this era it's not always the right one.
