Garage Door Problem Guide
Garage Door Opens but Won’t Close
If the door opens fine but refuses to close — or closes only when you hold the wall button — the safety system is the first suspect.
Quick answer
When a door opens but won’t close, the photo-eye safety sensors are usually the cause: they’re blocked, dirty, misaligned or have a wiring fault, so the opener refuses to close. Less often, the close limit, a remote/lock setting, or a failed logic board is to blame.
Safety first: Don’t bypass the sensors or tape them together. If you must close the door before it’s repaired, hold the wall button and watch the door the entire time, keeping everyone clear.
Likely causes
- Sensors blocked by an object, spider web, leaves or a hanging item.
- Sensors misaligned after being bumped by a car, bike or trash can.
- Wiring damage — staples, chewing or moisture.
- Dirty or wet lenses, especially after rain.
- Sun glare on the receiving sensor.
- Close limit or logic board problems.
Safe checks you can do
- Clear the area between the sensors.
- Wipe both lenses with a dry cloth.
- Check the indicator lights — both should be steady. If one blinks or is off, adjust its bracket until steady.
- Follow the wire from each sensor up to the opener looking for visible damage.
- Try the wall button held down. If the door closes this way, it confirms a sensor issue.
What not to do
- Don’t use the hold-down method as a long-term fix.
- Don’t remove, bypass or tape the sensors.
- Don’t splice wires with tape outdoors; corrosion will return.
Not comfortable checking this yourself?
Call and a technician can diagnose the door safely and explain the repair options.
Signs it needs a technician
- Lights stay off or blink even after cleaning and alignment.
- The wires look damaged or the problem comes and goes.
- The opener light flashes in a pattern.
- The door won’t close even with the wall button held.
Related: sensor repair, opener repair, sensor lights blinking.
Repair Services for This Problem
When a basic check doesn’t solve it, these are the services that usually do.
Frequently Asked Questions
Why will my garage door open but not close?
Usually the photo-eye sensors are blocked or misaligned, so the opener won’t close for safety reasons.
How do I close my garage door if the sensors aren’t working?
On most openers you can press and hold the wall button until the door is closed. Watch it closely and keep everyone clear.
Why does the opener light flash when I try to close?
Many openers flash the light to signal a sensor problem. Check alignment and cleanliness.
Can a spider web block garage door sensors?
Yes. Webs, dust and insects on the lens can interfere with the beam.
Could it be my remote?
If the wall button closes the door normally but the remote doesn’t, see wall button works but remote does not.
Do I need to replace both sensors?
Not always — sometimes a single sensor or a wire is the issue. A technician can test them.
Still Having Trouble
With Your Garage Door?
Call to describe what the door is doing. We serve Augusta, Evans, Martinez, Grovetown, Hephzibah, North Augusta and Aiken.