What it usually means, the likely causes in order, what to safely try first, what a pro charges in Canada, and when to stop and call one.
This guide covers the common cases. Describe your exact problem and get a personalized diagnosis — free to start, with a DIY vs. call-a-pro verdict and a real cost estimate.
A garage door that will not open or close at all usually has one of a short list of causes: a safety sensor that is blocked or misaligned, a power or opener problem, a door that has been manually disengaged, or a broken spring that prevents lifting altogether. The door is the largest moving object in most homes, and its weight is the reason for the caution running through this guide. The checks below are deliberately limited to observation, sensor and power checks, and confirming what does and does not respond, because the line between diagnosing a garage door and fighting one is crossed very easily and the door always wins.
A door stuck closed is usually an inconvenience unless a vehicle you need is inside or the garage is your main entry, in which case it becomes a same-day problem. A door stuck open, or one that will not stay closed, is a security and weather issue and should be treated promptly: secure the home entry from the garage, and if the door cannot be closed at all, call the same day. A door that moves partway, reverses without reason, or hangs unevenly should be left alone until inspected, since continued operation tends to convert a single fault into several.
The small photo-eye sensors near the floor on each side must see each other clearly or the opener will refuse to close the door, or reverse it as it starts down. A knocked sensor, a cobweb, a leaf, or sunlight glare on the lens produces exactly this refusal, and it is the most common and cheapest cause on this entire list.
The springs, not the opener motor, do most of the lifting. When a spring breaks, the door becomes extremely heavy, the opener strains, hums, or gives up, and the door may rise a few centimetres and stop. A visible gap in a coil spring above the door or a loud bang heard from the garage are the usual announcements.
A tripped breaker or GFCI, a dead remote battery, a wall control failure, or an opener motor or logic fault can all leave a healthy door unmoving. The pattern helps: if the wall control works but the remote does not, the problem is the remote; if nothing responds and no lights show on the opener, start with power.
The red-handled emergency release disconnects the door from the opener for manual use, and it sometimes gets pulled accidentally, leaving the opener cycling with no movement. A manual slide lock engaged on the door has the opposite effect, holding the door shut against the opener. Stored items leaning into the track or a bent track section can also stop travel outright.
| Job size | Typical estimate (CAD) |
|---|---|
| Simple fix — the straightforward version of this repair | $120–$350 |
| Major job — complex, hidden, or replacement-level work | $350–$800 |
Estimates only, calibrated to Greater Toronto Area trade rates and adjusted by region on this site — not a quote. Your exact price depends on the cause, parts, and access. A personalized diagnosis narrows this range using your specific symptom.
Homeowner scope here is genuinely small and that is the honest position: clearing and aligning sensors, checking power, replacing a remote battery, removing a floor obstruction, and noting the symptom pattern. Everything involving springs, cables, tracks under load, or a door that must be lifted belongs to a garage door professional, because the weight and spring tension leave no margin for learning on the job. Opener replacement and motor faults are also professional work for most households, partly for the electrical side and partly because the door must be balanced correctly for any opener to work safely.
That is the safety system doing its job, or believing it must. The photo-eye sensors near the floor are blocked, dirty, misaligned, or blinded by direct sunlight on one lens, so the opener treats the path as obstructed and reverses. Clean the lenses, clear the line between them, and check their indicator lights for steady alignment. If the sensors show aligned and clear and it still reverses, stop using it and have the system inspected.
That bang is very commonly a spring breaking, often heard through the house like something heavy falling. Afterwards the opener cannot lift the door because the spring was doing most of that work, so the door strains, rises slightly, or does not move. Do not keep trying the opener, do not try to lift the door yourself, and do not touch the spring. This is a professional repair, and the door should stay closed and unused until it is done.
Only if the springs are intact, the door is balanced, and you use the emergency release as the manufacturer describes, and even then a full-size door is heavy and awkward for one person. If there is any sign of a broken spring, a frayed cable, or the door hanging crooked, the answer is no: a door without its springs working is far heavier than most people expect and can drop. When in doubt, wait for the professional; a trapped car is an inconvenience, an injured back is worse.
Start with the remote battery, then try the remote standing close to the opener to remove range and interference from the picture. If a fresh battery and close range change nothing, the remote itself or its programming is the likely fault, and reprogramming it using the opener manual is reasonable homeowner work. The door, opener motor, and sensors are all proven healthy by the working wall control, so this fault is confined to the remote path.
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