Winter Garage Door Checklist for Mankato Homes: 8 Checks Before the Cold Hits
Quick answer: Before the cold hits, (1) test the door’s balance, (2) lubricate hinges, roller bearings and springs with silicone spray or white lithium grease, (3) check the bottom seal, (4) never force a door that’s frozen to the floor, (5) run the reversal and sensor tests, (6) look for a gap in the spring or frayed cables, (7) test the battery backup, and (8) never warm up the car in the garage.
Mankato’s average January low is about 6°F, and in late January 2019 the city hit 30 below zero. That cold is hard on garage doors: springs snap, grease thickens and seals freeze to the floor. These 8 checks take about 30 minutes in October or November. Most need no tools.
1. Test the door’s balance
Close the door, then pull the opener’s release cord so you can move the door by hand. Lift it about 3–4 feet and let go. A balanced door stays put. If it drops or shoots up, the springs need attention, so call a technician. Pull the cord only when the door is fully closed, and stop if the door feels very heavy.
2. Lubricate the right parts, with the right product
Use a silicone-based spray or white lithium grease on the metal hinges, roller bearings and springs. Skip WD-40 and oil-based products. Don’t grease the tracks (wipe them clean instead), and leave nylon rollers dry. Twice a year is enough for most homes.
3. Check the bottom seal
Look for cracks or gaps in the rubber seal along the bottom of the door. A worn seal lets in snow and meltwater, which then freezes the door to the floor. Keep the floor under the door clear of slush.
4. If the door is frozen to the floor, don’t force it
Running the opener against a frozen seal can strip the opener’s gear or tear the seal. Free it first with a plastic scraper or warm (not boiling) water, then dry the spot.
5. Run the two monthly safety tests
- Reversal test: lay a 2×4 flat in the door’s path and close the door. It should reverse when it touches the board.
- Sensor test: start closing the door and wave something through the beam between the two sensors near the floor. The door should reverse.
If either test fails, stop using the opener until it is fixed. Openers made before 1993 may not have sensors at all. More on garage door opener repair.
6. Look and listen, but don’t touch
With the door closed, look at the spring above the door. A gap in the coil means it has broken. Look for frayed lift cables at the bottom corners. Listen for grinding or squealing. Never loosen or adjust springs, cables or brackets yourself: they are under extreme tension. See spring repair and cable repair.
7. Test the battery backup, if you have one
Unplug the opener and try the remote or wall button. If the door doesn’t move, the backup battery may need replacing. More in our power outage guide.
8. Never warm up the car in the garage
The CDC warns: never run a car inside a garage attached to a house, even with the garage door open. Carbon monoxide builds up fast and can seep into the home.
When to call a pro
Call (507) 901-1400 if the balance test fails, a spring has a gap, a cable is frayed, or the door won’t reverse. Calls are answered 24/7. Ask for a price range on the phone before anyone drives out; our repair cost guide shows typical prices.
Winter garage door questions
Why do garage door springs break more in winter?
Spring steel gets more brittle in the cold, according to garage door maker Clopay, and a worn spring often fails on the first cold run of the morning.
What lubricant should I use on my garage door in winter?
A silicone-based spray or white lithium grease on hinges, roller bearings and springs. Not WD-40, not the tracks, not nylon rollers.
Is it safe to warm up my car in the garage with the door open?
No. The CDC says never run a car in an attached garage, even with the door open.
Sources: Clopay, Chamberlain (LiftMaster), U.S. Consumer Product Safety Commission, DASMA, CDC, NOAA climate normals, Mankato Free Press. Last reviewed: October 2026.
