This no-BS glossary cuts through jargon so Hollis homeowners can spot problems fast, ask the right questions, and avoid overpaying. Bookmark it—knowing these terms can save you hundreds on repairs and keep your garage door running smooth year-round in Hollis’ freeze-thaw climate.
Garage doors fail in predictable ways, but the lingo shouldn’t. Below are the 14 most common garage door repair terms we explain in plain English so you can diagnose issues, compare quotes, and talk to techs without getting snowed. Need a pro after reading? Call us today for a free estimate in Hollis or any town we serve. Serving Brookline, Nashua, and Hudson daily.
- Torsion spring
- A tightly wound metal coil mounted above the garage door that counterbalances the door’s weight, letting it open and close smoothly. When one breaks, the door can slam shut or refuse to move—common in Hollis winters when metal fatigues faster. Replacing torsion springs requires special tools and know-how; DIY attempts are dangerous and often violate local codes.
- Extension spring
- Long, stretched springs mounted on either side of the door track that extend and contract to lift the door. They’re cheaper than torsion springs but wear out faster, especially on older doors common in Hollis neighborhoods built before 2000. A snapped extension spring can turn your door into a projectile—always replace both springs at once.
- Track
- The metal rails (horizontal and vertical) that guide the door up and down. Bent or misaligned tracks are a top cause of off-track doors in Hollis, often from winter ice or a clumsy opener hit. Visible gaps or wobbling when the door moves signal track trouble—don’t ignore it.
- Roller
- Small wheels (plastic or steel) that ride inside the track and carry the door’s weight. Worn or cracked rollers make grinding noises and can derail the door, especially after years of use on Hollis’ gritty roads. Replace rollers in sets, not one at a time, to prevent uneven wear.
- Opener
- The electric motor that powers your garage door open and close. Modern openers come with smart features, but Hollis homeowners still rely on basic chain-drive models for reliability. If your opener jerks or hesitates, it’s usually worn gears or a misaligned travel module—both fixable without a full replacement.
- Photo-eye sensor
- Safety beams mounted near the bottom of the door frame that detect obstructions and stop the door from closing. If they’re dirty, misaligned, or blocked by snow in Hollis winters, your door may reverse unexpectedly or refuse to close. Test them monthly by waving an object in the beam’s path.
- Limit switch
- A tiny switch inside the opener that tells the motor when to stop opening or closing the door. If it’s set too tight, the door slams shut; too loose, and it won’t seal properly. Adjusting limit switches is a precision job—get it wrong and you’ll need professional help fast.
- Weatherstripping
- The rubber or vinyl seal along the door edges that blocks drafts, pests, and moisture. Hollis’ freeze-thaw cycles shred weatherstripping fast, leading to ice dams and higher heating bills. Replace it every 2–3 years or when you see daylight around the door edges.
- R-value (insulation)
- A number measuring how well garage door panels resist heat flow. Hollis homeowners with attached garages should aim for R-12 or higher to keep the space above freezing in winter. Insulated doors also dampen noise—handy if your garage doubles as a workshop or playroom.
- Cable drum
- The grooved wheel at the end of the torsion spring shaft that winds and unwinds the lift cables. If the cable drum is cracked or the cable jumps off, the door can drop suddenly. Always pair cable drum inspections with spring replacements to avoid catastrophic failure.
- Bottom seal
- The thick rubber strip attached to the door’s bottom edge that seals against the driveway. A worn bottom seal lets water, snowmelt, and critters into your garage—common in Hollis where slush pools near garage doors. Replace it when you see cracks or gaps wider than a credit card.
- Travel module
- The electronic brain inside the opener that controls speed, force, and travel distance. If your door stops midway or reverses for no reason, the travel module may need recalibration or replacement. Hollis’ humidity swings can corrode the module’s contacts—keep it dry and clean.
- Trolley
- The part that connects the opener to the door, sliding along the rail to move the door up and down. A stuck or noisy trolley usually means worn gears or misalignment—often fixed by adjusting the opener or replacing the trolley arm.
- Manual release
- A red-pull rope or handle inside the garage that disconnects the door from the opener, letting you open or close it by hand during power outages or opener failures. Always test yours twice a year—if it’s stiff or broken, you’re stranded when the power goes out in a Hollis nor’easter.
Frequently Asked Questions
How much does it cost to replace a torsion spring in Hollis compared to an extension spring?
Torsion spring replacements in Hollis run $220–$350 installed (parts + labor), while extension springs cost $120–$200. The price gap comes from safety: torsion systems are under high tension and require special tools. We always replace both springs at once to prevent uneven wear—saving you repeat service calls in our freeze-thaw climate.
How long does a typical garage door repair take for a Hollis homeowner?
Most Hollis garage door repairs wrap in 1–2 hours if parts are on hand. Off-track doors, sensor misalignments, or weatherstripping jobs take 30–60 minutes. Bigger jobs like opener replacements or full spring sets can stretch to 2–3 hours. We schedule same-day service in Hollis and nearby towns like Milford when possible.
Should I repair or replace my Hollis garage door after 15 years of use?
After 15 years, most Hollis garage doors show their age: sagging panels, worn springs, and drafty seals. If repair costs exceed 50% of a new door’s price, replacement is smarter. New insulated doors pay for themselves in energy savings—especially in Hollis’ cold winters. Compare your options before deciding.
Have a garage door repair question? Corey & Marcus Garage Door's Repairs LLC is licensed, insured, and gives Hollis homeowners a free written estimate.