Published 2026-04-22 · Madison Garage Door
Garage Door Opener Not Working: A 12-Point Diagnosis (Save the Service Call)
Quick answer: Run these 12 checks in order before you call anyone. About half of the "garage door opener not working" calls we get in the Madison area turn out to be five-minute DIY fixes: a tripped GFCI, a dead remote battery, a leaf stuck on a photo-eye lens. The checklist below walks you through power, remote, sensor, and mechanical issues. If you reach the end and the door still won't budge, you've narrowed it down enough that our diagnostic visit (around $89, waived with same-visit repair) will be quick.
Before we get to the list, one ground rule. Don't pull anything apart, don't loosen any springs, and don't put a screwdriver into the wall console. The point of this checklist is to identify problems you can solve with your hands and a fresh 9-volt, or at least to tell us exactly what's broken before our van pulls into your driveway. Every check below takes under two minutes.
Group A: Power-side checks (the embarrassing ones)
Roughly a third of "my opener is dead" calls we run between Madison and Sun Prairie end here. Nobody wants to hear it, but a tripped breaker is the most common cause of a totally silent opener. Start at the wall and work toward the motor.
Check 1: Does the outlet have power? Plug a phone charger or a lamp into the ceiling outlet the opener is using. If it doesn't power up, you have a tripped breaker, a tripped GFCI, or a dead outlet. Don't skip this one. We've billed for the trip more than once after a homeowner forgot they'd reset the panel after a thunderstorm and missed the garage circuit.
Check 2: Is the opener itself plugged in? Sounds insulting until you remember that holiday lights, paint sprayers, and shop vacs all need that ceiling outlet, and the cord gets unplugged and forgotten. Look up at the motor head. Confirm the plug is fully seated. Some older Liftmasters have a hardwired pigtail that loosens over time; if yours wiggles, push it back in firmly.
Check 3: Has the GFCI tripped? Wisconsin code has required GFCI protection on garage outlets since the 1980s, and a lot of attached garages in Middleton and Fitchburg run the opener through a GFCI in the garage itself or upstream in a bathroom or exterior outlet. Hit reset on every GFCI you can find. A summer storm with a nearby strike will pop these and leave the rest of the house running fine.
Check 4: Is the lockout switch on the wall console engaged? Most modern wall consoles have a vacation mode or lockout button that disables remote signals. It's a tiny slider or a long-press button. If a kid was playing with the console or your house cleaner brushed it, the remote will do nothing while the wall button still works. Toggle it off and try the remote again.
Group B: Remote and signal checks
If you've confirmed the opener has power and the wall button works but the remote doesn't, the problem is somewhere between the remote and the motor antenna. These four checks isolate it fast.
Check 5: Is the remote battery fresh? A remote with a weak battery often still shows an LED when you press the button but doesn't have enough signal strength to reach the opener. Swap in a fresh CR2032 or 9-volt (depending on your model) before assuming anything more serious. We see this in maybe one out of every six remote-related calls.
Check 6: Are you within 30 feet, line of sight? Standard 315 MHz and 390 MHz openers are rated for about 100 feet in open air but a lot less through walls, cars, and metal. Stand directly under the opener and press the remote. If it works there but not from your driveway, the issue is range, not the opener. Move on to check 7.
Check 7: Is the garage full of metal shelving or appliances blocking signal? A new fridge in the garage, a steel tool chest, or a row of metal storage racks can cut remote range in half. We had a customer in Verona last winter who couldn't figure out why his remote stopped working until we realized he'd just installed a metal pegboard wall right next to the opener antenna. Reposition the antenna wire (the thin one hanging down from the motor) so it dangles freely, away from metal.
Check 8: Has the rolling code desynced after a power outage? Liftmaster, Chamberlain, and most modern openers use rolling-code security, where the remote and the receiver advance through a synchronized sequence with each press. A brownout or surge can knock them out of sync. Hold the LEARN button on the motor head until the indicator light turns on, then press the remote button within 30 seconds. That re-pairs them. Madison's grid takes a beating during July storms, and we get a flurry of these calls every August.
Group C: Safety sensor (photo-eye) checks
If the opener tries to close and then reverses, or refuses to close while the open command still works, the photo-eye sensors are the prime suspect. Federal law has required these on every opener since 1993, and they account for roughly 40% of the "opener not working" calls we run in spring and fall.
Check 9: Are both photo-eye LEDs lit green? Look at the two small sensors mounted about six inches above the floor on either side of the door. One has a steady green light (receiver), the other has a steady amber or red (sender). If one is dark or blinking, the sensor itself is bad, the wire is cut, or alignment is off. A dark LED on the receiver side almost always means alignment, not a dead unit.
Check 10: Is the lens blocked? Wipe both lenses with a soft cloth. Leaves, cobwebs, snow drift from a January Madison thaw-refreeze cycle, and even bright low-angle sun shining directly into the receiver can fake out the sensor. Sunshine is a sneaky one. If your door refuses to close only on sunny winter afternoons, the receiver lens is getting blasted with direct light. A small piece of cardboard taped above the lens as a sun shade is a real fix that we recommend often.
Check 11: Is alignment within 2 to 3 degrees? Each bracket has a wing nut that lets the sensor pivot. Loosen it, rock the sensor up and down until the LED goes steady green, then tighten. Do both sides. This is the single most common fix on the entire list, especially after someone bumps a sensor with the snow blower.
Group D: Mechanical and door-side checks
Check 12: Is the door jammed? Pull the red emergency release rope hanging from the trolley. With the opener disengaged, try to lift the door by hand. If it won't move, you have a frozen bottom seal (very common in Madison winters when the seal welds to the concrete after a thaw-freeze cycle), an off-track door, or broken springs. A frozen seal you can usually free by kicking the bottom edge gently or pouring warm water along the threshold. An off-track door or a broken spring is a stop-now-and-call situation. Do not run the opener against a stuck door, or you'll burn out the motor capacitor and turn a $0 fix into a $180 to $440 repair.
What each check tells you about the underlying fault
Here's how to read the results. If checks 1 through 4 didn't find the problem, the opener has power. If checks 5 through 8 didn't find it, your remote is communicating. If checks 9 through 11 didn't find it, your safety sensors are happy. And if check 12 says the door lifts smoothly by hand but the motor still won't engage, you're looking at an internal opener fault: usually a stripped main gear, a failed capacitor, or a dead logic board.
Internal opener faults are where the service call earns its keep. A stripped gear sounds like a motor running with no door movement, around $90 to $160 to fix. A failed capacitor sounds like a hum without start, around $140 to $220 for a board swap that includes the capacitor. A dead logic board is total silence with confirmed power, also in the $140 to $220 range. If your unit is over 15 years old, we'll often quote a belt-drive replacement at around $480 to $780 instead, because chasing parts on an old chain-drive usually means another repair within a year.
Brand-specific quirks worth knowing
Some of the most frustrating "opener not working" cases aren't actually broken hardware. They're software glitches that look like hardware failures.
Liftmaster with MyQ wifi: After a firmware update last fall, a batch of MyQ-enabled Liftmaster units started ignoring the wall button if the wifi module lost connection to the router. The fix is to unplug the opener for 60 seconds, then re-add it in the MyQ app. We had three Middleton calls about this in a single week before we figured out the pattern.
Chamberlain rolling-code resync: Chamberlain's resync procedure is slightly different from Liftmaster's even though the companies share parts. The LEARN button is in a different spot on the motor head, and on some models you have to press it twice. Check your model's manual or the sticker on the side of the motor.
Genie Aladdin Connect: Genie's smart module has a known bug where the door status shows "closed" in the app even when it's open, after the device reboots. This isn't dangerous, but it can fool you into thinking the door isn't responding when it actually is. Force-close the Aladdin app and reopen it.
For Sommer and Linear openers, both of which are less common in Wisconsin but show up in higher-end Madison neighborhoods like Maple Bluff, the resync process is in the manual under "transmitter learning." These brands are reliable but the documentation is harder to find online.
When DIY ends and the service call starts
If you've run all 12 checks and the door still won't move, that's when our diagnostic visit pays off. The $89 covers a full inspection: spring tension test, cable check, roller condition, sensor circuit test with a multimeter, and a logic board read where we can pull error codes from the unit's memory. We'll quote the fix on the spot, and if you approve the repair the diagnostic fee comes off the bill.
Three symptoms mean stop, don't touch it, call now. First, a snapped torsion spring, which sounds like a gunshot from inside the garage and leaves a visible gap in the coiled spring above the door. Don't try to lift the door manually if a spring snapped, because the cables will be unloaded and the door is dead weight. Second, a cable off the drum, which looks like a slack wire dangling from the side of the door. Third, any door that's visibly tilted in the tracks, which means it jumped a roller and could fall.
Real Madison opener calls we got last month
Middleton MyQ firmware lockout: Homeowner called saying the opener "stopped responding" two days after a power outage. We arrived, confirmed the wall button worked but the app and remotes didn't, unplugged the unit for one minute, and re-paired the MyQ module. Total time on site: 18 minutes. Diagnostic of $89, no parts, no follow-up. She paid the diagnostic and said it was worth it just to know she didn't need a new opener.
Sun Prairie 22-year-old Genie sprocket: Customer's opener was making a grinding noise and the chain was slack. We pulled the cover and found the main drive sprocket had stripped its teeth, a classic end-of-life failure on a unit that age. We replaced the sprocket and the chain for around $140 in parts and labor. The opener should be good for another five or six years before the motor itself gives up.
Fitchburg condensation-fried board: Brand new Liftmaster, installed by another company eight months earlier, totally dead. We pulled the logic board and saw green corrosion on the contacts: humidity from the attached garage had seeped into the housing. Board swap was around $180, and we recommended a small dehumidifier in the garage for the summer months. The original install hadn't sealed the housing properly, which is something we always check on new installs.
Why Wisconsin garages eat opener boards
If you've owned more than one opener in a Madison-area home, you've probably noticed they don't last as long as the manufacturer claims. The 15-year warranty is real, but only in dry, climate-controlled garages. Wisconsin throws three things at openers that the engineers in California don't really account for.
First, humidity in attached garages. When you park a wet car in a 35-degree garage after a snowy commute home, the moisture condenses on every cold surface inside, including the opener's logic board. Do that 40 times a winter for 10 years and the contacts corrode. Second, the cold-condensation cycle. The opener housing warms up when the motor runs and cools when it sits, which pumps moist air in and out through any gap in the cover. Third, summer power blips. Madison's grid handles thunderstorm season pretty well, but the brownouts and micro-surges that go with it are murder on capacitors. A surge protector designed for the opener circuit (around $30 at any hardware store) extends life noticeably.
None of this means you need a new opener every five years. It does mean that if your unit is past 12 years old and acting flaky, sometimes the smartest move is a belt-drive replacement rather than chasing the next failure. We'll tell you straight which way the math goes when we come out.
Frequently asked
If the opener light works but the door doesn't move, what does that mean?
Light circuits and motor circuits are wired separately, so a working bulb tells you the unit has power but nothing about the motor. Nine times out of ten when we see that on a Madison call, the culprit is the safety photo-eyes: blocked, misaligned, or one of the lenses has lost its green LED. Check both sensor lights first. If they look fine, the next suspect is a stripped main drive gear (common on 15-year-old units), which usually costs around $90 to $160 to replace.
Why does my remote work outside but not inside the car?
Car windshields with metallic sun-blocking film act like a Faraday cage and can knock 80% of the signal range off a standard remote. Try opening the door from outside the car at 10 feet away. If that works, you have a windshield issue, not an opener issue. The fix is usually a visor remote with the antenna positioned at the top of the windshield, or pairing with the in-car HomeLink module.
Can I bypass the safety sensors temporarily?
We don't recommend it. The photo-eyes are required by federal law on every opener sold after 1993, and disabling them removes the only thing that stops the door from closing on a child, pet, or car bumper. If the sensors are bad, hold the wall-button down continuously to force-close the door once (most openers allow this), then call us. A new pair of photo-eyes runs around $60 to $120 installed, which is cheap insurance.
How do I tell if it's the opener or the door that's the problem?
Pull the red emergency release rope and lift the door by hand. A healthy door should feel like it weighs about 8 to 12 pounds across the whole travel, balanced at the halfway point. If it slams down or fights you on the way up, the springs are the issue and the opener is just the messenger. If it lifts smoothly by hand but the motor still won't run it, the problem is in the opener itself.
What's the diagnostic fee if you can't fix it on the visit?
Diagnostic is around $89, and we waive it when you approve the repair on the same visit. If we can't fix it that day (rare, but happens with discontinued boards or parts we'd need to order), the $89 still applies and we credit it toward the follow-up repair. You won't pay diagnostic twice for the same issue.
Do you stock parts for old openers (15+ years)?
Yes for the common ones. We carry gears, sprockets, and capacitors for Liftmaster, Chamberlain, and Genie units going back to the early 2000s. For really old Sears Craftsman or off-brand units where the logic board is no longer manufactured, we'll usually recommend a belt-drive replacement in the $480 to $780 range rather than chasing a board that may fail again.