If your garage door opener isn't working, start with the simple stuff: the wall switch, the remote batteries, and the safety sensors near the floor on each side of the door. Most opener problems trace back to one of those three, a stuck limit switch, or a worn drive gear, not a dead motor. Work through them in order before assuming you need a new unit.
Opener runs but the door doesn't move
If the motor hums or runs but the door stays put, the most common cause is a stripped drive gear inside the opener housing, a plastic gear that wears down over years of use and eventually spins freely without turning the trolley. This is a cheap part but requires opening the unit to replace. A snapped or slipped drive belt or chain causes the same symptom on belt- and chain-drive openers. Either fix is usually a same-visit repair for a technician, not a full opener replacement.
Opener doesn't respond at all
Check the wall switch first by pressing it directly; if that does nothing, the issue may be the opener's power supply rather than the remote. Confirm the unit is plugged in and the breaker hasn't tripped, garage circuits share breakers with other outlets more often than homeowners expect. If the wall switch works but the remote doesn't, try fresh batteries and a manual resync following your opener's brand-specific instructions before assuming the remote itself is bad.
Door reverses immediately after closing
This almost always points to the safety sensors, the small photo-eye units mounted a few inches off the floor on each side of the track. If they're misaligned, dirty, or one has a blinking light instead of solid, the opener reads that as an obstruction and reverses the door as designed. Monsoon dust settling on the sensor lenses between July and September is a common seasonal cause here; wiping both lenses with a soft cloth and rechecking alignment solves it more often than people expect before they call for service.
Opener is noisy or slow
A chain-drive opener that's suddenly louder than usual often just needs lubrication on the rail and chain, using a garage-door-specific lubricant rather than general oil, which can attract more dust. A belt-drive opener that's gotten noisy may have a worn belt reaching end of life, typically a 10 to 15 year part depending on use. If the door has also gotten slower to open, check whether the travel and force settings drifted, most openers have adjustment screws or a settings menu for both.
Garage door opener repair cost vs. replacement
Opener repair usually runs $100 to $300 for common fixes like a drive gear, sensor realignment, or a logic board issue, parts and labor included. Full opener replacement typically runs $300 to $600 installed for a standard chain or belt-drive unit, more for a quieter belt-drive or a smart opener with camera and app connectivity. If your opener is more than 10 to 12 years old and needs a repair beyond a sensor or remote issue, replacement often makes more sense than sinking money into a unit near the end of its expected life. These are national estimates; get two quotes before deciding either way.
An opener repair is also a reasonable moment to check the rest of the door. If the opener is straining because the door itself is heavy to lift by hand, that's often a spring problem rather than an opener problem, and no opener repair will fix it. See our garage door spring replacement cost guide if the door feels heavy when moved manually with the opener disconnected.
When it's not the opener at all
A door that won't move even when you pull the manual release cord and try to lift it by hand usually points to a spring, cable, or track problem, not the opener. Don't keep hitting the wall switch or remote if the door doesn't budge manually either; that can burn out a motor trying to force a mechanically stuck door. Our guide to garage door won't open covers the full diagnostic path when the opener isn't the clear cause, and our garage door off track guide covers what to check if the door is visibly crooked in the track.
Licensing note
Garage door repair isn't uniformly a licensed trade category in Arizona the way HVAC is. Licensing requirements vary by scope of work and dollar amount. Look up any contractor at azroc.gov's license lookup before hiring, and ask directly whether your specific job falls under a licensed category.
Common questions
How much does it cost to repair a garage door opener?
Expect roughly $100 to $300 for common opener repairs like a drive gear, sensor realignment, or logic board issue, parts and labor included. Full opener replacement runs $300 to $600 installed for a standard unit. Get two quotes, since pricing varies by contractor and by opener brand.
Are garage door openers worth repairing?
Usually, yes, if the opener is under 10 to 12 years old and the problem is a drive gear, sensor, or logic board rather than a burned-out motor. Repair typically costs a fraction of replacement. Once an opener is older or needs a second major repair, replacement often makes more financial sense.
What are common garage door opener issues?
Misaligned or dirty safety sensors are one of the most frequent causes, since even a small obstruction reading causes the opener to refuse to close or reverse immediately. A worn drive gear is the most common cause when the motor runs but the door doesn't move at all.
What is the average labor cost to replace a garage door opener?
Labor typically runs $150 to $300 of the total $300 to $600 installed price for a standard chain or belt-drive unit, with the rest going to the opener itself. Smart openers with camera or app connectivity cost more for the unit but usually take a similar amount of labor to install.
Find a local technician
We list rated contractors across the Valley, including Chandler, Gilbert, and Phoenix. Use the quote form below to compare a couple of technicians before booking a repair.