Your car is stuck in the garage. Or worse, you're stuck outside of it. A garage door that won't open is one of those problems that demands immediate attention — and the fix can range from a $10 sensor realignment to a $400 spring replacement. Here's how to figure out what's wrong before you call.
Emergency? If your vehicle is trapped or you need immediate access, call us at (781) 222-DOOR. We prioritize emergency calls and can usually respond same day across the South Shore.
Problem 1: Broken Torsion Spring
Broken Torsion Spring
How to identify it: The most common cause of a door that suddenly won't open. You'll often hear a loud bang when the spring breaks. Look at the horizontal bar above the door — if you see a gap in the coil, that's your culprit. The opener may run but the door will barely move or won't move at all.
Why it happens: Torsion springs have a rated cycle life — typically 10,000 cycles. Most residential doors open and close 3–5 times daily, which means a spring lasts 5–9 years. Cold New England winters put extra stress on the metal during contraction.
Can you fix it yourself? No. Torsion springs are under extreme tension and are responsible for most serious garage door injuries. This is a professional-only repair. We carry springs for all standard door weights and sizes on our service trucks, so this is typically a same-day fix.
Never attempt to repair a broken torsion spring yourself. A spring under tension contains stored energy equivalent to a powerful projectile. Improper handling has caused severe injuries and fatalities. Always call a professional.
Problem 2: Dead Opener (Motor or Circuit Board)
Opener Not Responding
How to identify it: You press the button and nothing happens — no light, no sound, no movement. Check that the opener is plugged in and the circuit breaker hasn't tripped. Also check whether the disconnect cord (usually a red rope hanging from the opener trolley) has been pulled.
What it might be: Dead remote batteries ($5 to fix yourself), tripped outlet or GFCI ($0), burned-out circuit board in the opener ($80–$180 for the board), or a motor that's reached end of life ($250–$450 to replace the whole unit).
When to replace vs. repair: If the opener is more than 12 years old and the circuit board has failed, replacement often makes more economic sense than repair. A new LiftMaster with WiFi and battery backup offers real functional value over a repaired old unit.
Problem 3: Snapped or Frayed Cable
Broken Lift Cable
How to identify it: The door may move unevenly, sag on one side, or not move at all. Look down the sides of the door for slack or coiled cable lying on the floor. A snapped cable is obvious — you'll see frayed wire at the bottom of the door or piled on the floor.
Why it happens: Cables experience wear at the drum and bottom bracket where they wrap and unwind. Fraying typically begins at the connection points. A broken spring (see Problem 1) can also snap a cable if the door is forced open after the spring fails.
Can you fix it yourself? Technically possible, but cables are usually replaced alongside springs since they're under similar tension and wear together. A tech doing a spring replacement will typically inspect and replace cables at the same time.
Problem 4: Misaligned or Blocked Safety Sensors
Safety Sensor Issue
How to identify it: The door won't close, or closes and immediately reverses. The sending sensor (usually with a yellow or amber light) and the receiving sensor (green light) should both be solid. A blinking or dim light on either sensor indicates misalignment or an obstruction.
Fix it yourself: Look for anything blocking the sensor beam — a spider web, dirt on the lens, or a stray garden hose. Wipe both lenses with a cloth. If they're out of alignment, loosen the wing nut on the sensor bracket, adjust until the green light is solid, and retighten. This is genuinely something most homeowners can do in under 10 minutes.
When to call us: If both sensors look clear and aligned but the door still won't close, the sensor wiring may be damaged or the unit itself may need replacement. We stock all major sensor pairs for same-day repair.
Problem 5: Off-Track Door
Door Off the Track
How to identify it: The door is visibly crooked, the rollers have jumped out of the track, or you can see daylight along one side when it should be fully closed. Attempting to run the opener when the door is off-track can damage the door panels and the opener trolley.
Why it happens: Physical impact (backing into the door), a worn roller that breaks and falls out of the track, or a severely bent track section. Also common when a spring breaks and someone tries to force the door anyway.
Stop using it immediately. An off-track door under tension from a connected opener can cause the door to collapse or buckle. Disconnect the opener and call for service.
Problem 6: Stripped or Worn Rollers
Worn Rollers
How to identify it: The door is loud — grinding, squealing, or rattling as it moves. In severe cases, a broken roller can cause the door to bind or stop mid-travel. Look at the rollers (the wheels inside the track) — worn nylon rollers will have visible cracks or missing nubs on the wheel edge.
What to do: Steel rollers should be lubricated every 6–12 months with a silicone-based spray (avoid WD-40 on garage doors — it attracts dirt). Nylon rollers on a 10+ year old door that are cracked or crumbling should be replaced. A full set of 10 nylon rollers takes about an hour to replace.
Problem 7: Frozen to the Ground
Frozen or Stuck in Winter
How to identify it: More common in Massachusetts than people expect. Ice forms between the door's bottom seal and the concrete floor overnight, bonding them together. The opener runs but the door won't lift, or you hear a straining motor sound.
Fix it yourself: Do not force the opener repeatedly — this will burn out the motor. Instead, break the ice seal manually using a heat gun, warm water (not boiling — thermal shock can crack concrete), or an ice scraper. Then apply a silicone-based lubricant or petroleum jelly to the bottom seal before the next freeze.
If the opener burned out trying: You may have damaged the motor capacitor or trolley. Call us for a diagnostic — we'll let you know if a repair is cost-effective or if replacement makes more sense.
What to Expect From a Service Call
Our standard service call starts at $189. That covers the diagnostic, the tech's time, and most minor adjustments. Parts are additional — but we give you a full written quote before doing any repair work. No surprise charges.
For most of the problems above (broken spring, cable replacement, roller swap), the total repair is completed in the same visit. We stock the most common parts on every truck.
If your door is more than 15 years old and multiple things are failing at once, we'll give you an honest comparison: repair vs. replacement. Sometimes a new door makes more financial sense than repairing an aging one. We won't push you either direction — we'll give you the numbers and let you decide.
Submit a service request or call (781) 222-DOOR. We serve Quincy, Braintree, Weymouth, Milton, Hingham, and surrounding communities. See our verified 5-star reviews from South Shore homeowners. Emergency calls prioritized.