Summer in the Valley is less a season than a siege. In the summer of 2023, Phoenix went 31 straight days with highs of 110 degrees or more, and on July 19 of that year the overnight low only fell to 97, a new record for the city. When nights stay that warm, an attached garage never gets a chance to cool off, so the door, opener and seals stay hot around the clock.
That relentless heat, the grit carried in by monsoon storms and the city's hard tap water explain most of the repairs homeowners here run into. This guide covers what to watch for, what is safe to handle yourself, and when a door needs a professional.
When the garage never cools down
In milder climates a garage sheds its heat overnight. Here, a closed garage behind a west-facing door can stay hot day and night for much of the summer, so opener electronics, plastic gears and lubricants get no recovery time. Constant heat speeds up wear on all of them.
Old grease thins, drips off the rollers and then dries into a sticky film that catches dust. Vinyl and rubber seals dry out and harden, and rollers wear faster once grit works into them. If your door has started to shudder or groan on the way up, a tune-up that replaces worn rollers and resets the opener's force and travel settings often smooths it out again.
An insulated door is often the biggest single upgrade for a hot garage, especially when a bedroom or kitchen shares a wall with it. Do any hands-on checks early in the morning, because a garage on a summer afternoon can get hot enough to bring on heat exhaustion.
Sprinklers, hard water and the bottom panel
Phoenix tap water is hard, carrying calcium and magnesium picked up from the soils its source water flows through. When a sprinkler head or drip line wets the door, the water evaporates fast and leaves chalky white spots behind. Repeated soaking also keeps the bottom edge damp, and wherever the finish is scratched or chipped, a steel door can start to rust from the lowest section up.
Aim heads away from the door and frame, and clean fresh spots with a soft cloth and a mild cleaner your door's manufacturer approves before they harden. A bottom section that is already rusting through can often be swapped on its own if the same door model is still in production.
Keeping bark scorpions on the other side of the door
Arizona bark scorpions can climb rough surfaces such as stucco and block walls, and they need a gap of only about a sixteenth of an inch to get inside. Of all the openings in a house, the garage door is normally the biggest, so its weatherstripping earns attention.
Check three places: the bottom seal where the door meets the floor, the stop molding along the sides and top of the frame, and the lower corners, where gaps open first as rubber shrinks. Replace a bottom seal that is flattened or has slipped out of its retainer, and consider a threshold seal if the slab is uneven.
Snowbirds, Sun City and doors that sit idle
Sun City and Sun City West are retirement communities popular with snowbirds, and many seasonal homes elsewhere in the Valley also sit empty through the hottest months. A door that does not move for months can come back with stiff rollers, a dead remote battery or a bottom seal baked onto the concrete.
A few minutes of preparation before you leave helps:
- Close the door fully and engage the lock button or vacation mode on the wall control, if yours has one.
- Unplug the opener if no one will be using or checking the garage, which also shields it from storm-related power surges.
- Take remotes out of any car you leave behind and keep spare batteries indoors.
- If a neighbor or house watcher looks in on the home, ask them to run the door now and then and report any new noise.
Areas around the Valley with recent work
Service calls have taken a technician to homes in the communities and ZIP codes below. Other addresses in the Valley can often be reached as well, so ask about yours when you get in touch.
- West Valley: Goodyear (85338, 85395), Avondale (85323), Buckeye (85396)
- Northwest Valley: Peoria (85381, 85383), Surprise (85374), Sun City (85373), Sun City West (85375)
- East Valley: Mesa (85203, 85206), Chandler (85286), Tempe (85283)
- Scottsdale and beyond: Scottsdale (85255, 85260), Rio Verde (85263)
- North and south: Phoenix (85086), Maricopa (85138)
Planning service around the desert calendar
The cooler months are the comfortable time to replace a door or opener, and a spring inspection before the heat builds catches tired rollers and openers that are already straining. Monsoon season can bring dust storms and power outages, so make sure everyone at home knows where the opener's manual release is. It should be pulled only with the door closed, because a door with a weak or broken spring can drop fast once it is disconnected.
Springs deserve their own warning. Torsion springs hold enough tension to cause serious injury, and the lift cables they connect to are just as dangerous under that load. If you hear a loud bang in the garage or spot a gap in a coil, stop using the door and call for help rather than trying to adjust, loosen or release anything yourself.
Last updated by the American Garage Door Team.