Boston homeowners who do this 30-minute inspection every fall consistently avoid the emergency calls that hit their neighbors every January. Here's the complete checklist — exactly what our technicians do on a paid maintenance visit, condensed into a DIY-friendly format.
Visual Inspection (5 minutes)
- Check all panels for dents, cracks, rust spots, or warping — pay special attention to the bottom two panels which take the most weathering
- Inspect the bottom weather seal — replace if cracked, torn, or flattened to less than half its original thickness
- Look for fraying, kinking, or rust on both lift cables along their entire length from the drum to the bottom bracket
- Check the spring or springs for visible rust along the coils, gaps between coil turns, or deformation — any of these means a spring is approaching the end of its life
- Verify the tracks are straight with no visible bends, and check that all mounting brackets are tight against the wall with no gaps or loose bolts
Lubrication (10 minutes)
Use a silicone-based or white lithium spray lubricant. Never use WD-40 — it is a solvent and degreaser, not a lubricant. WD-40 actually strips existing lubrication, attracts dirt, and accelerates wear on metal components. The right product costs $6 at any hardware store and lasts an entire year of annual service. Apply to each of the following:
- All rollers along the door — except nylon rollers, which are self-lubricating and don't need it
- All hinges along the door panels, on both sides of each hinge pin
- The torsion spring — a light coat along the coils helps prevent rust during wet Boston winters
- Both lift cables — a light coat along their full length
- The opener's drive mechanism — chain, belt, or screw depending on your model (check your owner's manual for the correct product, as some belt-drive openers specifically prohibit lubricant on the belt)
Safety Tests (10 minutes)
- Balance test — Disconnect the opener by pulling the red emergency release cord. Lift the door manually to approximately waist height and let go. A properly balanced door will stay in place. If it falls toward the ground or shoots upward on its own, the springs are out of balance and need professional adjustment. Never skip this test — an out-of-balance door puts excessive strain on the opener motor year-round.
- Auto-reverse test — Place a 2x4 flat on the ground directly under the door in its path. Close the door using the opener. The door should reverse immediately and fully when it contacts the board. If it pushes on the board or reverses slowly or partially, adjust the force settings on the opener or call for service — this is a safety-critical function.
- Photo-eye test — While the door is closing, wave your hand or foot through the sensor beam between the two photo-eye units. The door should stop and reverse immediately. If it doesn't, clean both sensor lenses, check alignment, and test again. If it still fails, call for service before using the door.
What to Replace Yourself
- Bottom weather seal — available at any hardware store for $15–$30. It slides out of a channel along the bottom of the door and the new one slides in. A flathead screwdriver and 20 minutes is all it takes.
- Roller pins — standard nylon rollers are straightforward to swap one at a time with a pair of pliers. Replace one at a time, never removing an entire side at once.
- Remote batteries — always use fresh alkaline batteries, not rechargeable. Rechargeable batteries have lower peak voltage that can cause erratic remote behavior even when "fully charged."
What to Always Call a Pro For
Springs and cables under tension. No exceptions, ever. Torsion springs store enormous mechanical energy — enough to cause severe, life-altering injuries when they fail under load or are improperly handled. Lift cables are directly connected to those springs and carry the same risk. This is the one category in garage door maintenance where DIY is genuinely dangerous, not just inadvisable. Every other item on this checklist is safe for a homeowner to handle. Springs and cables are not.