Opener Not Working, Sorted From Fastest Fix Down
Start with what the opener DOES tell you: totally dead points at power, remote-only failure points at batteries or pairing, motor-runs-door-stays points at a pulled release cord, and refusing-to-close points at the sensors. The tree below runs cheapest-first — most opener complaints resolve in the first four branches without a part or a visit.
// THE NUMBERS UP FRONT
The tree, cheapest branch first
Each branch takes minutes and requires nothing sharper than a stepladder. Stop at the first branch that fixes it; the order is the strategy.
Prove the outlet
Lamp into the opener’s ceiling outlet. Dead lamp: reset every GFCI in the garage (plus suspiciously-related bathroom/exterior ones) and check the breaker. Live lamp with a dead opener — no lights, no click, no response — moves you down the tree with power eliminated.
Check what still works
Try wall button, then a remote, then the keypad. The pattern is the diagnosis: everything dead = power or board; wall-only = radio side (lock mode, batteries, antenna); remote-only = console wiring; nothing-but-hums = capacitor or jam. Thirty seconds here aims every minute that follows.
Kill the lock mode
If remotes died together while the wall button lives, hunt the LOCK/vacation toggle on the console — long-press or slider by model. It exists to deaden radio control when you travel, and it gets engaged by lean, toddler and accident constantly. This is the most embarrassing branch and one of the most visited.
Look at the trolley
Motor runs, chain moves, door ignores it: the release cord was pulled — the carriage is coasting past the door’s attachment. Reset the latch (pull the cord once more, or toward the door on lever styles) and press the wall button; the trolley clicks over the arm and re-engages itself.
Read the sensor LEDs
Opens fine but will not close, or closes only while holding the wall button: that is the photo-eye lockout doing its job. Both sensor LEDs steady = eyes healthy, look at travel limits; any blinking or dark LED = the alignment guide’s procedure, ten minutes, free.
Power-cycle and relearn
Unplug the unit for sixty seconds and restore. Boards wedge like any computer; post-outage units relearn travel on the next cycles. Watch one full slow cycle before judging — deliberate crawling immediately after restore is recovery, not failure.
Pull the release and weigh the door
Door down, cord pulled, lift by hand. Light and smooth: the door is innocent and the opener is genuinely the patient — book the opener visit. Heavy, crooked or grinding: STOP. That is counterbalance failure wearing an opener costume, the door stays closed, and the spring/cable service page is the correct call.
Match the symptom to the part
What survives all seven branches sorts cleanly: hum-click-quit = capacitor; runs-with-grinding + door stationary = stripped drive gear; total silence on a proven outlet = board or transformer; remote-range collapse on an old unit = radio aging. All are visit-sized; the FAQ above prices which are worth it by unit age.
Symptom → most likely cause → your move
The tree above, compressed for the person standing in the garage with a phone.
| Symptom | Most likely | Move |
|---|---|---|
| Totally dead, no lights | GFCI/breaker, then board | lamp test → resets → power-cycle |
| Wall works, remotes dead | lock mode; then batteries/antenna | console toggle → coin cells |
| Remotes work, wall dead | console or its two-wire run | wire-touch test → console swap |
| Hums, clicks, quits | capacitor — or a jammed/heavy door | release-cord weight test first |
| Runs but door ignores it | release cord was pulled | re-latch → wall button |
| Opens, refuses to close | photo eyes, then travel limits | LED read → alignment guide |
| Grinding, door barely moves | stripped nylon drive gear | stop cycling; gear-kit visit |
| Works from 3 feet only | battery → antenna → RF interference | swap, straighten, de-LED |
Why the order of the tree is the whole trick
Every branch above is ordered by two ruthless criteria: how often it is the answer, and how cheap it is to test. The outlet branch leads not because it is clever but because shared garage circuits trip constantly and the test costs a lamp and ten seconds. The what-still-works branch follows because openers fail in signatures — radio side, wired side, power side, mechanical side — and one round of button-pressing splits the whole diagnostic space before a single tool comes out. Run the tree out of order and you can spend an afternoon disassembling a unit whose GFCI needed one button.
The tree also encodes the safety geometry of the machine. The opener is deliberately the WEAK partner in the system — a fractional-horsepower motor steering a door the springs actually lift — so any symptom involving weight, crookedness or corner noises is routed immediately out of opener-land to the counterbalance pages. That routing is not caution theatre: an opener straining against a broken spring will burn out its own gear and motor trying, converting one repair into two. The release-cord weight test near the tree’s end is the single most valuable habit on this page, because it cleanly separates the machine that moves the door from the system that carries it — and it is exactly the first thing a good technician does on arrival.
The four parts that actually fail, and what each costs to name
Decades of service data concentrate opener failures into four organs — recognize the signature and the visit prices itself.
The starting capacitor
Hum-click-quit on AC units. An inexpensive cylinder swapped in minutes by any service tech — the classic case of a $20 part reviving a “dead” opener, and the first suspect on any unit that still lights and clicks.
The nylon drive gear
Motor runs enthusiastically, door ignores it, white shavings dust the motor head’s interior: the sacrificial gear stripped — often BECAUSE a heavy door overworked it. Gear kits are routine visits; the balance check afterward is the part that prevents the sequel.
The logic board
Erratic behaviour, dead radio side, phantom operation after storms. Boards price meaningfully, which is why their failure on a unit past ten years usually reads as a replacement quote rather than a repair one.
The safety-sensor circuit
The highest-volume category and the cheapest: eyes, their wiring, their aim. Covered end-to-end by the alignment guide — and the reason that guide exists as this tree’s most-visited exit.
What the phone call should sound like when the tree ends at a visit
The tree’s real product is a better first sentence. “The opener hums for a second and quits; the door lifts light and level on the release; outlet tested live” books a capacitor-length visit with the right parts on the truck. “It grinds and the door does not move; there are white plastic shavings in the head” books a gear kit. “Four blinks after every close attempt; sensor LEDs both steady” books a wiring hunt. Each sentence is thirty seconds of this page’s branches compressed into dispatch-grade information — and each one shortens the visit it books.
The same call should surface the two facts that reshape quotes: the unit’s age (the ten-year line decides repair-versus-replace before the truck rolls) and anything the weight test found, because a heavy or crooked door reroutes the entire appointment from opener work to counterbalance work. Shops price honesty gladly — what costs money is the exploratory visit that starts from “it just stopped working” and has to rediscover everything a homeowner already observed.
Opener troubleshooting rules
Repair, replace, or just re-latch: the money view
Most of this page costs nothing — the first six branches are habits and button-presses, and the release-cord latch is the single most common “repair” in the opener world. When a part IS the answer, the price bands stay friendly on younger units: capacitors, gear kits, sensor pairs and consoles are all modest line items on a standard service visit, detailed with real wage math on the opener cost page. The door keeps working manually throughout, which is why almost nothing here justifies emergency rates.
The decade line is where the math bends. Logic boards and motors on aging units price against whole replacements that arrive with rolling-code security, battery backup, quieter drives and a fresh warranty — and parts support for old units sunsets on the manufacturer’s schedule, not yours. A unit past ten years earning its second real repair has usually earned its retirement instead; the belt-vs-chain comparison and the cost page carry that decision from here.
Opener not working — the questions that matter
The wall button works but no remote does — what died?
Almost never the opener. One remote failing is its coin cell; every remote failing at once points at the receiver side — most commonly the LOCK or vacation mode engaged on the wall console (a long-press or slider toggles it, and it deadens all radio control by design while the wall button keeps working). The other candidates: an antenna wire tucked up against the motor head instead of hanging free, or — rarest — a wiped pairing memory after a power surge, cured by re-running the Learn sequence from the programming guide.
Every remote works but the wall button is dead — same answer?
Inverted fault, inverted suspects. The wall console is wired, not radio, so its failures are physical: a broken conductor in the two-wire run (staple through insulation is the classic), corroded terminals at either end, or a failed console — they are simple switches with electronics on modern units and they do die. Diagnostic shortcut: kill power, disconnect the two wires at the console and touch them together briefly; if the opener clicks or runs on restore, the wiring is fine and the console itself is the part. Consoles are inexpensive; the wire hunt is the labour.
The opener hums for a second, clicks, and gives up — is it dead?
The hum says the motor has power and wants to run; the give-up says something physical will not let it. Two main stories: a failed starting capacitor (the hum-click-quit signature on AC units — an inexpensive, commonly stocked part a service visit swaps quickly) or a mechanical jam the motor cannot overcome, which on a door with a broken spring is the OPENER PROTECTING ITSELF from lifting dead weight. Before booking, pull the release and lift the door by hand: heavy means springs, and the opener was never the patient.
It worked this morning and now nothing — with no storm, no event?
Check the least dramatic thing first: the outlet. Openers share garage circuits with freezers, chargers and shop tools, and a tripped GFCI upstream kills the ceiling outlet invisibly — press RESET on every GFCI face in the garage (and sometimes a bathroom or exterior one on the same run), then check the breaker panel. Plug a lamp into the opener’s outlet to prove it either way. This branch closes more “dead opener” tickets than every other branch combined, which is why it sits first in the tree.
The remote range has shrunk to a few feet — antenna or interference?
Both are real; the order of testing is battery, antenna, interference. A fading coin cell shrinks range gradually and is a two-minute swap. The antenna is the thin wire hanging from the motor head — it should dangle free and straight, not be coiled, taped up or pinned behind the rail. If both check out, suspect new RF neighbours: LED bulb drivers (especially cheap ones IN the opener’s own lamp sockets) are notorious wideband emitters — test by removing the bulbs entirely for a day. Persistent unexplained shrinkage on an old fixed-code unit is one more argument for its scheduled retirement.
After a power outage the opener runs but behaves strangely — why?
Two normal recovery behaviours masquerade as faults. Many units relearn travel on their first cycles after losing power — expect a slow, deliberate full cycle or two before judging anything. Battery-backup units may run dim-lit and slower until the battery recharges, and some annunciate (beeping, flashing) while on battery or while the backup battery is failing its self-test — a backup battery at end of life is a cheap, user-replaceable part, and California installs since 2019 have one by statute. Give the unit two powered cycles and a charge day before escalating.
Which opener failures are actually worth repairing?
Price the part class against the unit’s age. Cheap and always worth it on a unit under ten years: capacitors, gear kits (the nylon drive gear’s shredded-teeth failure is famous), sensor pairs, wall consoles, backup batteries. Priced against replacement on older units: logic boards and motors — by the time boards fail, parts support is often sunsetting and a new unit buys current safety hardware, rolling-code security and a warranty. The opener cost page carries the full repair-vs-replace table; the honest inflection sits near the ten-year line.
When is a not-working opener an emergency versus a nuisance?
The opener alone is almost never the emergency — the release cord converts any opener failure into a manually operable door, and the outage guide covers living that way comfortably. The emergencies wear an opener costume: a door that got dramatically heavy on the release (spring failure), a door hanging crooked (cable off the drum), grinding from the corners under load. Those are counterbalance events, the door should stay closed and unused, and the routed line on the service pages is the correct next call — not more opener troubleshooting.
Could the problem be my garage’s power quality rather than the opener?
Occasionally, and worth one glance in outage-prone or generator-equipped homes. Openers tolerate normal utility variation, but brownouts mid-cycle can wedge boards (the sixty-second unplug cures it), cheap generators produce power some electronics refuse, and a shared circuit sagging under a compressor start can brown the opener at the worst moment. If failures correlate with the shop vac, the EV charger or storm-season grid wobbles, the pattern is your diagnosis — and the fix is circuit hygiene, not opener parts.
Why does my opener work in summer and struggle in winter?
Cold amplifies every marginal condition at once: grease thickens, steel contracts, seals stiffen and batteries sag — so a door that was borderline in October fails honestly in January. The winter-specific checklist: lubricate with a cold-rated product, watch for the force-margin symptoms (straining, partial travel), and note that backup batteries and keypad cells both weaken in the cold. A unit that needs its force limits raised every December is reporting friction, and the friction — not the dial — is the repair.
The opener light blinks a pattern — how do I read it?
The blink-code is the unit confessing. Most brands encode faults as flash counts on the motor-head lamp or a dedicated diagnostic LED — commonly distinguishing sensor faults, sensor WIRING faults, and travel/force anomalies as separate counts. The label inside the light lens or the manual decodes your model’s dialect. Copy the count before power-cycling (cycling can clear the display but not the cause) — walking into a service call with “four flashes, twice, after every attempted close” converts a diagnostic hour into a parts visit.
My door reverses at the exact same spot every time — which branch is that?
A repeatable reversal point is geometry talking, not electronics. Something at that position adds resistance — a flattened roller, a track dent, a dry hinge binding as panels articulate, or (at floor level) a travel limit set past the slab. The force system reads the resistance spike as an obstruction and reverses, honestly. Watch the door at the trouble spot while it moves: a visible shudder or a roller lifting out of its groove marks the station. Same-spot reversals are track-and-roller territory; random-spot reversals are force-margin territory.
Is it safe to keep using a partially working opener while I wait for parts?
Grade it by what still verifies. If the door passes the beam-break and 2×4 reversal tests, a cosmetic fault (dead lamp, one lost remote) changes nothing about safe use. If the ENTRAPMENT tests fail — or the unit needs force cranked, held buttons or sensor bypasses to move — park it: release the trolley, run the door manually, and let the opener wait for its visit powered off. The convenience of a compromised automatic close is never worth what the safety layers exist to prevent, and manual mode costs a household almost nothing for a few days.