QUICK ANSWER
If your door starts to close and then goes back up, the safety sensors are the most likely cause. Wipe the lenses and make sure both sensors point at each other. If the lights still blink, the sensors or wiring need service.
Safety sensors sit near the floor on each side of the door. Federal safety rules have required them on openers made since 1993. If the beam between them is blocked or out of line, the door will not close.
Common sensor problems
Sun can blind a sensor in the afternoon. A bumped bracket, a loose wire, or dirt on the lens can also stop the door. Never disconnect the sensors to make the door close. If the sensors are fine, see garage door won’t close or opener repair.
WHY ORANGE COUNTY CHOOSES ROYALTY
- The name your neighbors recommend. Homeowners across Orange County call Royalty first, and they send their friends.
- The price before the work. A free estimate and a clear price. You pay once the door works and you are happy.
- Local shops close to you. Royalty has shops in Mission Viejo, Dana Point, and Westminster.
Helpful details to share when you call
- Note whether the door reverses immediately or near the floor.
- Describe any blinking lights or app warning.
- Mention any recent work or impact near the sensor brackets.
What can cause the problem?
An interrupted or shifted sensor path
An obstruction or a moved sensor bracket can interrupt the safety system. Note visible warning lights without bypassing the sensors.
Wiring or a separate travel fault
A connection issue can affect the sensors, while door resistance or travel problems may also cause reversal. Similar symptoms do not always share a cause.
HOW ROYALTY HANDLES IT
At Royalty Garage Door Repair, we realign or replace the sensors, repair the wiring, and test that the door stops and reverses when something is in the way.
Request a free estimateQuestions about safety sensor repair
Can I bypass the sensors until the visit?
No. Do not defeat the safety system to make the door operate. Keep the opening clear and discuss the situation with Royalty, particularly if the garage is left unsecured.
Does a blinking light prove the sensor is broken?
A warning may indicate an interrupted path, alignment, wiring, or another model-specific issue. The light is diagnostic information, not a reason on its own to buy a replacement sensor.
