Short answer: A door that starts down and rolls right back up is one of the most common calls we get, and the fix is often something you can check yourself in five minutes. Work through these causes in order, from the simplest to the ones that need a technician.
A door that starts down and rolls right back up is one of the most common calls we get, and the fix is often something you can check yourself in five minutes. Work through these causes in order, from the simplest to the ones that need a technician.
Start With the Photo-Eye Sensors, the Number One Reason
If your door starts down and then rolls right back up, or won't close at all while the opener lights blink, start at the two small sensors mounted near the bottom of each track, about six inches off the floor. These photo-eyes shoot an invisible beam across the opening; if anything breaks it, the door is designed to reverse so it can't close on a person, pet, or car. Nine times out of ten the obstruction is harmless: a stray broom, a trash can, a coiled hose, even a patch of low afternoon sun hitting the lens. Clear the path, then wipe both lenses gently with a soft cloth. Next, check alignment. Each sensor has a small LED, and both should glow steady when they see each other. If one blinks or goes dark, nudge it by hand until both are solid; a bumped bracket knocking a sensor out of aim is the single most common cause of this whole complaint.
When It's the Limit and Force Settings, Not the Sensors
If the sensors are clean, aligned, and both LEDs are solid but the door still reverses, the opener's travel and force settings are the next suspect. Every opener has adjustment controls, usually dials or buttons on the motor head, that tell it how far to travel and how much resistance to allow before it assumes it hit an obstruction. If the down-limit is set so the door keeps pushing after it already reached the floor, the opener senses resistance and reverses, thinking it struck something. Cold mornings and a slightly stiff door can tip a borderline setting over the edge. These adjustments are homeowner-accessible and covered in your opener's manual, but they interact with the door's balance, so make small changes. If you find yourself cranking the force way up just to get the door to stay down, that's a red flag that the real problem is mechanical, not electronic.
Mechanical Causes a Pro Checks Last: Rollers, Tracks, and Springs
When the sensors and settings check out, a technician looks at what the door is physically doing. A door that binds partway, from a dry or damaged roller, a track that's slightly out of alignment, or a section that's warped, creates drag that the opener reads as an obstruction, so it reverses. Worn hinges and rollers that simply need lubrication are common and inexpensive to address; a door that has drifted out of balance because a spring is fatiguing is more serious, because the opener is now fighting weight it was never meant to carry. A pro disconnects the opener and moves the door by hand, feeling for the exact spot it sticks, then corrects the mechanical cause before touching any electronic setting. Fixing the drag at its source is what makes the repair last, rather than masking it by dialing up the force and wearing out the opener early.
Frequently Asked Questions
Start With the Photo-Eye Sensors, the Number One Reason?
If your door starts down and then rolls right back up, or won't close at all while the opener lights blink, start at the two small sensors mounted near the bottom of each track, about six inches off the floor. These photo-eyes shoot an invisible beam across the opening; if anything breaks it, the door is designed to reverse so it can't close on a person, pet, or car. Nine times out of ten the obstruction is harmless: a stray broom, a trash can, a coiled hose, even a patch of low afternoon sun hitting the lens. Clear the path, then wipe both lenses gently with a soft cloth. Next, check alignment. Each sensor has a small LED, and both should glow steady when they see each other. If one blinks or goes dark, nudge it by hand until both are solid; a bumped bracket knocking a sensor out of aim is the single most common cause of this whole complaint.
When It's the Limit and Force Settings, Not the Sensors?
If the sensors are clean, aligned, and both LEDs are solid but the door still reverses, the opener's travel and force settings are the next suspect. Every opener has adjustment controls, usually dials or buttons on the motor head, that tell it how far to travel and how much resistance to allow before it assumes it hit an obstruction. If the down-limit is set so the door keeps pushing after it already reached the floor, the opener senses resistance and reverses, thinking it struck something. Cold mornings and a slightly stiff door can tip a borderline setting over the edge. These adjustments are homeowner-accessible and covered in your opener's manual, but they interact with the door's balance, so make small changes. If you find yourself cranking the force way up just to get the door to stay down, that's a red flag that the real problem is mechanical, not electronic.
Mechanical Causes a Pro Checks Last: Rollers, Tracks, and Springs?
When the sensors and settings check out, a technician looks at what the door is physically doing. A door that binds partway, from a dry or damaged roller, a track that's slightly out of alignment, or a section that's warped, creates drag that the opener reads as an obstruction, so it reverses. Worn hinges and rollers that simply need lubrication are common and inexpensive to address; a door that has drifted out of balance because a spring is fatiguing is more serious, because the opener is now fighting weight it was never meant to carry. A pro disconnects the opener and moves the door by hand, feeling for the exact spot it sticks, then corrects the mechanical cause before touching any electronic setting. Fixing the drag at its source is what makes the repair last, rather than masking it by dialing up the force and wearing out the opener early.
How do I get help with this?
Call (408) 906-0446 and describe the situation, your exact location, and what you need. Timing is confirmed on that call rather than promised in advance.
Call for help: (408) 906-0446 — a straight answer and an honest estimate before any work begins.