Garage Doors · Service

Opener repair — and when the opener is not the problem

Motor runs but nothing moves. Door starts down then reverses. Remote works from three feet and no further. Each of those points at a different part, and one of them is not the opener at all.

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In short

What is garage door opener repair?

A garage door opener is a small motor, a drive mechanism, a control board and a safety circuit — and each fails with its own signature. A motor that runs while the door stays still is usually a stripped gear or a disengaged trolley. A door that starts down and reverses is usually the photo eyes or a force setting. A remote that only works up close is usually the receiver or battery. The single most useful diagnostic is whether the door moves easily by hand: if it does not, the opener is innocent.

Triggers

Signs you need garage door opener repair

The motor hums or runs its full cycle but the door does not move
The door starts to close, stops, and goes back up — sometimes with the opener light flashing
One of the two sensor LEDs near the floor is off, flickering, or a different colour than the other
The remote works only within a few feet of the opener, or works from inside the garage but not the driveway
The opener runs noisily, rattles, or makes a grinding sound the door does not make when moved by hand
The door opens fine but will not close, or closes fine but will not open
The wall button works and no remote does — or the reverse

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The job

How garage door opener repair actually works

Separate the opener from the door

With the door closed, the emergency release is pulled and the door lifted by hand. If it moves easily and holds near waist height, the mechanical side is healthy and the fault is genuinely in the opener. If it is heavy, the visit becomes a counterbalance job instead.

Watch for: Skipping this and replacing an opener because it "could not lift the door". A new opener fitted to an unbalanced door fails in exactly the same way, and by then you have paid for a unit you did not need.
Read the fault the unit is already telling you

Most openers signal faults through the LED on the motor head or the wall control — flash counts, colours, or a code. Combined with when in the travel the failure occurs, this narrows the cause quickly.

Watch for: A technician who does not look at the diagnostic LED. It is the manufacturer's own fault code and it is free information.
Check the safety circuit

The photo eyes are checked for alignment, lens contamination, low sun shining directly into the receiver, damaged wiring at the staples, and loose bracket mounts. A door that will only close if you hold the wall button down is the classic signature of a safety-circuit fault.

Watch for: Sensors being bypassed or jumpered to make a door close. That disables the mechanism that stops the door on a child or a pet, and no legitimate technician will do it.
Drive mechanism and gear inspection

The chain, belt or screw drive is checked for slack, wear and correct trolley engagement, and the gear set inside the motor head is inspected. A running motor with a still door is most often a stripped drive gear or a trolley that never re-engaged after a manual release.

Watch for: A gear kit quoted without the head being opened. It is a common and repairable failure, but nobody knows it is that one without looking.
Travel limits and force settings

Limits tell the opener where fully open and fully closed are; force settings tell it how much resistance is normal. Both drift, and both get mis-set after any other repair. They are re-calibrated to the door as it is now.

Watch for: Force settings wound up to overcome a mechanical problem. It makes the symptom disappear and makes the door more dangerous, because it will now push harder through an obstruction.
Re-test both safety functions

The photo-eye test — breaking the beam as the door closes — and the contact-reversal test with an obstruction on the floor. Both must pass before the job is signed off.

Watch for: Only the photo-eye being tested. They are two independent systems and either can fail alone.

Money

What does garage door opener repair cost?

Opener repair is priced by the part: a sensor pair, a remote or receiver, a gear kit, or a logic board. Board and gear repairs on an older unit can approach the price of a new opener, which is the point at which replacement deserves a look. See the garage door cost guide.

See the full garage door opener repair cost guide — by material, size and region →

Straight answer

When garage door opener repair is the wrong call

Everyone else ranking for this is paid when you say yes. Here's when you shouldn't.

The door will not lift by hand with the opener released. The opener is fine and the counterbalance is not. Go to spring replacement before anyone sells you a motor.
The unit is old enough that parts have to be hunted down. Once a board or gear kit is discontinued or costs a large fraction of a new opener, repairing it is buying time rather than a fix. Get a new opener priced alongside.
Your opener has no photo eyes at all. Units predating the safety-sensor requirement are not repairable into compliance in any meaningful sense. That is a replacement conversation, and it is the one case where we would push you towards it.
Only the remote is dead. Batteries, re-pairing and interference from new LED lighting near the receiver cover most of these. If the wall button runs the door, nothing on the opener is broken.
The noise is coming from the door, not the head. Move the door by hand with the opener disconnected. Grinding that persists is rollers, hinges or track — that is track repair.
You are chasing quiet. If the goal is to stop waking the room above the garage, repairing a chain drive rarely gets you there. Nylon rollers plus a belt-drive unit is the change that works, and that is a replacement decision rather than a repair one.

Straight answer

Can I do this myself?

Never bypass, jumper or tape over the photo eyes to make a door close. They are the mechanism that stops the door on a child, a pet or a bumper, and disabling them turns an annoying fault into a genuinely dangerous door. If the door will only close on a held-down wall button, that is the safety circuit doing its job and telling you something is wrong.

Reasonable to DIY

Wiping the sensor lenses and re-aiming the brackets until both LEDs are steady
Checking nothing is parked, stacked or hanging in the beam path
Replacing remote and keypad batteries and re-pairing them to the opener
Re-engaging the trolley after a manual release by running the opener once with the door closed
Tightening the lag screws on the ceiling brackets and the rail supports
Swapping a nearby LED bulb for a different one if the remote range dropped when you changed the bulb — LED interference is real and commonly missed

Call a licensed pro

Opening the motor head for gear, sprocket or capacitor work
Logic board diagnosis or replacement
Travel limit and force calibration, which sets how hard the door pushes
Any hard-wired sensor or wall-control wiring fault inside walls or ceilings
Anything that turns out to be the door rather than the opener — springs, cables, tracks

Before you sign

What to check when hiring for garage door opener repair

Did you check the door balance by hand before diagnosing the opener?

It is the test that decides whether you need an opener repair at all. Openers get replaced every day for spring problems.
What is the diagnostic code on the unit telling you?

The manufacturer built a fault indicator into it. A technician who used it will be able to say which one showed and what it means.
What does this repair cost against a new opener fitted?

The comparison you need, stated in one sentence. On an older unit, a board plus a gear kit plus labour can get close, and you should see both numbers.
Is the replacement part new, refurbished or aftermarket?

All three exist for common openers and they carry different lifespans and warranties. It should be your choice, not a default.
Will you re-calibrate the travel limits and force settings afterwards?

Any drive or sensor repair changes what the opener sees. Leaving old settings in place is how a repaired door starts reversing at the floor.
Are you fitting new safety sensors or reusing the existing pair?

Sensors are inexpensive and are the most weather- and impact-exposed part of the system. On an intermittent fault, replacing the pair often ends the problem for good.
Will you demonstrate the obstruction reversal test before you go?

Separate from the photo eyes, and the one you can watch. A door that does not bounce back off a length of timber is not finished.

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Local pros

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Related work

Often done at the same time

Garage Door Opener Installation

When repair stops making sense

Garage Door Repair

If the door itself is the problem

Garage Door Track Repair

Noise that persists by hand

Garage Door Maintenance

Annual service and safety testing

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FAQ

Garage Door Opener Repair — questions people ask

Still have a question? Talk to our team →

The motor runs but the door does not move. What is wrong?

Two usual causes. Either the trolley never re-engaged after somebody pulled the emergency release — running the opener once with the door closed normally re-latches it — or the drive gear inside the motor head has stripped, which is a common wear failure and often produces plastic shavings inside the housing. The first costs nothing; the second is a gear kit and labour, and is worth comparing against a new unit on an older opener.

My garage door starts to close then reverses. How do I fix it?

Start with the photo eyes: clean both lenses, confirm nothing is in the beam, and check that both LEDs are steady rather than flickering. Misalignment from a knocked bracket is the single commonest cause. If the sensors are clean and aligned, the next candidates are the down-force setting, the travel limit being set past the floor, or debris in the track channel. Never hold the wall button down as a workaround — that is the safety circuit being overridden.

Why does my garage remote only work up close?

Usually a weak battery or radio interference. LED bulbs are the modern culprit — fitting one near the opener head can flood the receiver frequency and cut remote range dramatically, and the timing of the change is the giveaway. Other candidates are a damaged antenna wire hanging from the motor head, or a failing receiver. Test the keypad and a second remote to work out whether the problem is the transmitter or the opener.

Is it worth repairing an old garage door opener?

Repair when the fault is a discrete part on a unit that is otherwise sound — sensors, a remote, a gear kit, a capacitor. Lean towards replacement when the logic board has gone on an older unit, when parts are becoming hard to source, when the drive is worn as well as the electronics, or when the opener predates safety sensors entirely. Ask for both numbers in the same visit and decide with them side by side.

Can I replace the safety sensors myself?

Cleaning and realigning them, yes — that resolves a large share of sensor faults and costs nothing. Replacing them means working with the low-voltage wiring back to the motor head, which is manageable for some people but is also where intermittent faults hide, because the original wiring is usually stapled along a wall and the damage is at a staple you cannot see. If a clean and realign does not hold, get it looked at rather than fitting a second pair onto the same bad wire.

My opener works from the wall button but not the remote. Which part failed?

That pattern points at the radio side rather than the motor: transmitter battery, lost pairing, a damaged antenna, interference, or a failed receiver. Work through it in that order, because the first two are free. If a fresh battery and a re-pair do not bring it back, and a second remote fails the same way, the receiver in the opener is the likely fault.