Garage doors take a beating. They open and close multiple times a day, exposed to weather, and people tend to ignore them until something breaks. Here's how to handle the common issues.
Door Won\'t Open or Close
Check the obvious stuff first. Is the opener plugged in? Is the circuit breaker tripped? Is the manual lock engaged? If you have a wall switch AND a remote, and neither works, it's probably a power issue. If the remote doesn't work but the wall switch does, the remote battery or the receiver is the problem.
Door Reverses Before Hitting the Floor
The safety sensors at the bottom of the track are probably misaligned or dirty. These are the two photo-eye units, one on each side, about 15cm off the ground. They shoot an invisible beam between them. If the beam is broken, the door thinks something is in the way. Clean the lenses with a soft cloth. Check that both units are pointing at each other. The indicator lights should be solid, not blinking.
Door Only Opens Part Way
The up-limit switch might need adjustment. Or the springs might be worn. If the door is heavy to lift manually, the springs need attention. Don't try to adjust torsion springs yourself unless you have the right tools and experience. These springs are under extreme tension and can cause serious injury.
Noisy Operation
Garage doors get loud when they need lubrication. Use a silicone-based lubricant or white lithium grease on the rollers, hinges, and the trolley on the opener rail. Don't use WD-40 as a lubricant. It's a solvent, not a lasting lubricant. Also check for loose hardware. Bolts and nuts can vibrate loose over time. Tighten everything.
Door Closes Too Hard or Doesn\'t Close All the Way
The down-force setting on the opener needs adjustment. Modern openers have a force adjustment dial or digital setting. The door should close firmly but reverse if it meets resistance. Test with a roll of paper towels. The door should reverse when it touches the roll.
Remote Range Is Terrible
The opener's antenna wire might be damaged or poorly positioned. It's usually a short wire hanging from the motor unit. Make sure it's hanging straight down and not touching any metal. If the range is still bad, the receiver might be going bad, or there might be radio interference from nearby electronics.
Door Is Crooked When Closing
One of the cables might have come off the drum. This is a safety issue. Don't use the door. The cables, drums, and springs work together. If one cable is off, the door is unbalanced and can come crashing down. Call a professional.
Regular Maintenance
Lubricate moving parts twice a year. Test the auto-reverse feature monthly. Check the balance by disconnecting the opener and lifting the door manually. It should stay in place when halfway up. If it doesn't, the springs need adjustment.