Few things are more frustrating than heading out on a cold Ontario morning and finding your garage door refuses to close. Winter is peak season for garage door problems, and the good news is that most causes are common and fixable. Here are the seven most likely reasons your garage door will not close in winter, and what to do about each.
1. Dirty or misaligned safety sensors
The photo-eye sensors near the bottom of each track stop the door from closing on an obstruction. Road salt, slush, and condensation, or a slight bump, can dirty or misalign them. If your door starts to close then reverses and the opener light blinks, suspect the sensors: wipe the lenses gently and make sure both point at each other (the indicator lights should glow solid).
2. Hardened or thickened lubricant
Grease on the rollers, hinges, and springs thickens in the cold, adding resistance the opener reads as an obstruction. Apply a fresh garage-door-specific silicone or lithium lubricant (never WD-40) to keep parts moving in freezing temperatures.
3. The door is frozen to the ground
Melting snow can refreeze under the bottom weather seal, gluing the door to the concrete. Never force it with the opener, which can strain the motor or bend a panel. Break the ice seal gently and replace a cracked bottom seal.
4. Contracted metal and misaligned tracks
Metal contracts in the cold, which can worsen slightly bent tracks or loose hardware. If the door binds or shudders at the same spot every time, the tracks likely need adjustment.
5. Worn or stiff rollers
Cold weather exposes worn rollers that drag in the track. Replacing them restores smooth, quiet travel.
6. Close-force or limit settings
Openers have force and travel-limit settings. Cold-weather resistance can trip an over-sensitive close-force setting, causing the door to reverse before it seals. These settings sometimes need a seasonal adjustment.
7. A broken spring
Springs are most likely to snap in cold weather, when the metal is brittle and under load. If the door is very heavy, hangs crooked, or you heard a loud bang, a broken spring is the likely culprit, and that is a job for a professional. Learn more on our garage door spring repair page.
Why the door is frozen to the floor, and what not to do
Meltwater runs down the door, pools on the concrete under the bottom seal, and freezes overnight. In the morning the rubber seal is bonded to the slab. The opener pulls, the seal holds, and one of two things gives: the bottom section tears at the retainer, or the cables jump off the drums. Both are far more expensive than the seal. Never hold the button down against a frozen door. Cut the power, pull the release, and try to break the ice bond by hand with a gentle rocking motion. If it will not move, warm water along the seal or a heat gun on low will release it. Then dry the concrete before closing the door again.
Cold-weather faults that look like something else
Grease and oil thicken in the cold. An opener that reverses on the way down in January but was fine in October is often just a stiff door: thickened lubricant in the hinges and rollers makes the door bind, and the opener reads the resistance as an obstruction. Re-lubricating with a proper garage door lubricant that stays fluid in the cold fixes it. Photo-eye sensors also misbehave in winter: frost on the lens, or a sensor bracket shifted by a shovel, breaks the beam. Wipe the lenses and check the indicator lights before assuming a fault.
Getting ahead of it in the fall
October is the month to prepare. Replace a bottom seal that shows daylight, because a good seal sheds water instead of trapping it. Lubricate every moving part with a cold-rated lubricant. Check the balance, since a door that is already heavy on the springs will fail in the first cold snap. Clear the low spot in the driveway where water pools under the door, or lay a threshold ramp so the seal lands on rubber rather than on ice. Most of the emergency calls we run in January started as a small problem that was visible in October.
Still stuck? Get same-day help in Burlington & the GTA
If your door will not close and you cannot spot the cause, do not force it. Pro Entry Garage Doors offers same-day and 24/7 emergency repair across Burlington and the Greater Toronto Area, with upfront pricing and a free service call on any repair. Call 416-666-6745 or request service online.