A garage door is the largest moving part of most homes. It opens and closes thousands of times per year, carries hundreds of pounds of tension, and lives in an Arizona garage where summer temperatures push every component toward its limits. Twenty minutes of yearly maintenance prevents most of the problems we get called out for.
Run this checklist once a year — most homeowners do it in early fall when garage temperatures are tolerable. If anything on the list is outside your comfort level, skip it and have a technician handle it during a tune-up.
Visual Inspection First
Open the garage door fully and stand under it. Look at every component with the door in the up position.
Springs. Torsion springs sit on a shaft above the door. Look for any visible gaps in the coil, rust, or oil weeping at the cone. A gap means the spring has snapped — stop everything and call a professional. Light surface rust is normal; pitted or flaking rust is a replacement signal.
Cables. Two cables run from the bottom corners of the door up to the drums on either end of the spring shaft. Inspect each cable end-to-end for fraying, kinks, or broken strands. A frayed cable is the warning that comes before a cable snap.
Rollers. Rollers ride in the tracks on each side of the door. Spin each one with your hand. They should turn smoothly without wobble or grinding. Cracked plastic wheels, missing bearings, or rollers that do not turn freely are due for replacement.
Hinges. Each panel is connected to the next with hinges. Look for cracked metal, missing bolts, or hinges that have worked loose. Hinges with visible wear marks where they pivot have likely lost their bushings.
Tracks. The vertical and horizontal tracks should be straight and free of dents. A bent track makes the door bind, especially as it transitions from vertical to horizontal travel. Tracks should be tight to the wall and ceiling — a track that has worked loose creates noise and uneven travel.
The Balance Test
This is the single most important test you can run yourself. Disconnect the opener by pulling the manual release cord. Lift the door manually to about waist height and let go.
A properly balanced door will stay roughly where you placed it, drifting only an inch or two. A door that slams down hard has too little spring tension or a broken spring. A door that flies up to the open position has too much tension. Either condition stresses the opener and shortens its life dramatically.
Re-engage the opener by pulling the release cord again and running the opener through one cycle.
Clean and Lubricate
Wipe the tracks with a dry rag to remove dirt, dust, and any built-up grease. Do not lubricate the inside of the tracks — that is a common mistake. The tracks should be clean and dry; the rollers ride them, not slide on them.
Apply white lithium grease (spray or tube) to:
- Each roller’s bearing/stem
- Each hinge pivot
- The torsion spring (light coating along its length)
- The opener’s chain, screw, or trolley track
Do not use WD-40. It is a degreaser, not a lubricant, and it will strip protective grease off components. Do not use motor oil — it attracts dust and gums up.
Test the Safety Reverse
Federal code requires every automatic opener to reverse when it contacts an obstruction. Test it twice a year minimum.
Place a 2×4 flat on the floor under the door. Press the close button. The door should contact the wood, stop, and immediately reverse. If it does not — or if it crushes the wood and keeps going — the close-force setting is too high or the reverse mechanism has failed. Adjust per your opener’s manual or have a technician handle it.
Test the photo-eye sensors too. Start the door closing, then wave a broom handle through the beam at the bottom of the tracks. The door should stop and reverse immediately. If it does not, clean the sensor lenses and check that both indicator lights are solid.
See our opener troubleshooting guide if either safety test fails.
Tighten and Inspect Hardware
A garage door cycles through enough vibration that hardware works loose over time. Walk around the door and snug up:
- Hinge bolts (do not overtighten — strip-out is easy on the panel side)
- Track bracket bolts
- Roller stem nuts
- Lag bolts on the opener mounting bracket and the spring anchor bracket
If you find a bolt that turns indefinitely without snugging, the threads are stripped and the bolt needs to be replaced before it backs out entirely.
Replace the Bottom Seal
Look at the rubber or vinyl seal along the bottom of the closed door. Cracks, gaps, missing chunks, or visible daylight underneath all signal it is time to replace. In Arizona, plan on swapping the bottom seal every three to five years.
Replacement seals are inexpensive and slide into the retainer at the bottom of the door. Pull the old one out, lubricate the retainer with a little soapy water, and slide the new one in. Total time: about 30 minutes.
Door Surface and Hardware
Wash the door with a mild soap and water. Inspect for dents, panel separation, or paint fade. Touch up any chips or scratches with manufacturer-supplied paint or a matched enamel — exposed steel rusts even in our dry climate, especially around irrigation overspray.
Check the photo-eye brackets at the bottom of the tracks. They are easy to bump with car bumpers, lawn equipment, or kids’ bikes. Bent brackets misalign the sensors and cause intermittent reverse problems.
Schedule Pro Service for Anything You Skipped
If the checklist surfaced anything you do not want to handle yourself — spring concerns, automation issues, frayed cables, anything alarming — schedule a tune-up. A technician can run through the entire system in about an hour and catch issues that are not obvious from the outside. See our garage door repair page for what a service visit includes.
Run this checklist once a year and your door will outlast the warranty by a wide margin. Skip it for too long and you will eventually meet us under emergency-call circumstances.