Clear the doorway
Remove anything blocking the beam between the two sensors near the floor.
Garage door sensor problem causing reversal or no close?
Safety sensors stop the door closing on a person or object. If they are blocked, dirty, misaligned or damaged, the door reverses or will not close. Call 833-877-1717. RepairNowUSA connects the request. An independent garage door technician does the repair.
Am I in the right place?Yes for a door that reverses, will not close, or blinking sensor lights.
Is this urgent?Urgent if the property cannot be secured.
What do I do next?Do the checks below, then call 833-877-1717.
Still will not close: garage door won’t close.
RepairNowUSA editorial review · Last substantively reviewed October 14, 2026 · Review standards
Safe checks
Clean the lenses
Wipe dust, cobwebs and dirt from both sensor lenses.
Check the lights
Most sensors have indicator lights. A blinking or off light often means misalignment or a wiring problem.
Springs and cables are dangerous
Garage door springs and cables hold enormous tension and can cause serious injury. Never adjust, loosen or remove springs, cables or bottom brackets yourself. Only pull the emergency release when the door is fully closed: releasing a raised door with a broken spring can make it fall. Keep children and pets away from a damaged door.
Common causes
Misaligned sensors
Bumped sensors stop pointing at each other, so the door reverses or will not close.
Dirty lenses
Dirt and webs block the beam.
Sunlight interference
Direct sun into a sensor lens can make it think the beam is blocked.
Damaged wiring
Wires cut, chewed or stapled through can stop the sensors working.
What to have ready when you call
- Property ZIP code and whether it is a home or business
- What happens: reverses, will not close or opener lights blink
- Sensor light status, if you can see it
- Whether the sensors were bumped or wires damaged
- Whether the door is stuck open
How garage door sensor repair usually works
- Check alignment. Sensors are realigned so the beam connects.
- Check wiring. Wires and connections are tested and repaired.
- Replace failed sensors. Faulty sensors are replaced with compatible ones.
- Safety test. The auto-reverse is tested with an object in the doorway.
Federal safety rules have required garage door openers to have entrapment protection, such as photo-eye sensors, since 1993. Sensors should never be bypassed.
What happens when you call RepairNowUSA
- Describe what is happening in plain words and give the property ZIP code. You do not need to know which trade to ask for.
- RepairNowUSA checks for a participating independent provider who handles garage door repair in that area.
- If one is available, you are connected. The provider confirms timing, access, scope and price with you before any work.
- The provider, not RepairNowUSA, diagnoses and performs the repair.
RepairNowUSA is a referral and connection service. Provider availability and response times vary by location, time and demand, and are not guaranteed. Before you approve work, ask what was found, the price, the timing and what is not included.
Call 833-877-1717Garage door sensor problem causing reversal or no close questions
Why does my garage door go back up?
The sensors are blocked, dirty or misaligned, or the close-force setting needs adjustment.
Can I bypass the sensors?
No. Sensors are a required safety feature that prevents the door from closing on people, pets and objects.
Can I close the door if the sensors fail?
Many openers let you hold the wall button to close the door. Watch the door the whole time and get the sensors fixed.
Can I call at night or on a weekend?
Yes. You can call 833-877-1717 at any time, including nights, weekends and holidays. Whether an independent provider can come out right away depends on your ZIP code, the time and provider capacity, so availability is not guaranteed.