Door starts closing, then reverses
The door begins to close and immediately goes back up, often with the opener light flashing. That's the opener telling you the safety beam is broken or unreadable — the classic garage door sensor symptom.
Garage Door Sensor Repair & Replacement in Calgary
If the door reverses, blinks, or only closes while you hold the wall button, the photo eyes or wiring are likely at fault. We diagnose alignment and wiring properly so you don't pay for an opener you don't need.
- Licensed & Insured
- Upfront flat pricing
- Warranty on Parts & Labor
- $0 Service Call
- No hidden fees. No surprise charges.
- Best price guarantee (We Price Match)
Call us now for a free estimate
Is it the garage door sensors?
Signs Your Garage Door Safety Sensors Are the Problem
Garage door sensor faults have a very particular set of symptoms. If any of these sound familiar, the photo eyes — not the opener — are the likely story.
Only closes while you hold the button
When the opener can't see a healthy garage door sensor signal, it requires constant pressure on the wall button to close — a built-in safety override. If your door suddenly demands this, the garage door sensors need attention.
Garage door sensor lights blinking or dark
Each photo eye has an indicator light — typically amber on the sender and green on the receiver. A blinking or unlit receiver means the beam is misaligned, blocked or the wiring has failed.
Fine some days, impossible others
Garage door sensors knocked a few millimetres out of alignment — by a broom, a bike, a snow shovel — work intermittently as vibration and sunlight shift the signal. Intermittent reversal is almost always alignment or wiring, not a dying opener.
Flat, upfront pricing
Garage Door Sensor Repair & Replacement — What's Included
Garage Door Sensor Repair or Replacement
- Full sender, receiver and wiring diagnosis
- Precision alignment of both photo eyes
- Matched replacement pair if units have failed
- Safety-reversal test with the door in motion
- No diagnostic, dispatch or weekend fees
The final price is confirmed on-site before any work begins, once we've diagnosed whether you need a realignment, a wiring repair or new garage door sensors. There are no add-ons once the tech arrives — the price you approve is the price on the invoice, day or evening, weekday or weekend.
Every other repair we offer works the same way — a firm, written price confirmed on-site before the tech lifts a wrench.
From call to a safe door
How a Fenix Garage Door Sensor Service Goes
01
Call and describe the behaviour
Tell us what the door does — reversing, blinking lights, hold-to-close — and whether anything has bumped the garage door sensors lately.
02
Same-day tech dispatched
A stocked truck heads out, usually within a couple of hours. We text on the way and on arrival.
03
Signal path tested end to end
We check both photo eyes, their alignment, and the wiring back to the opener head with a meter, isolating the exact point of failure.
04
Aligned, repaired or replaced
Whatever the fault — alignment, a wire, or a dead garage door sensor — it's fixed on the spot and the garage door sensors are secured so they stay aligned.
05
Safety reversal verified
We test the reversal with an object in the beam and confirm the door refuses to close on it — the only result that matters before we leave.
Why call a pro
A Small Fix, Diagnosed Honestly
Garage door sensor problems are among the most misdiagnosed in the trade — too many end with a sold opener nobody needed. Here's how we handle them.
We test the whole signal path
Sender, receiver, alignment, wiring back to the opener head — we check each link with a meter, not a guess. Most garage door sensor calls end with a realignment or a wiring repair, and we show you exactly which it was.
Safety restored, never bypassed
The photo eyes exist to stop the door closing on a child, a pet or a car. We never bypass or disable them — we restore them to full, tested operation, because a door without working garage door sensors is a genuine hazard.
Replacement only when needed
Photo eyes do eventually fail — moisture, age and impact take their toll. When a unit is genuinely dead we fit a matched pair compatible with your opener, aligned and tested, rather than selling you an opener.
Same-day, stocked trucks
Our trucks carry the common garage door sensor pairs and wiring, so most calls are resolved in a single visit. Calls before noon are almost always handled the same day.
Common questions
Garage Door Sensor Repair & Replacement FAQ
Can you bypass the garage door sensors?
No — and we'd advise against anyone who offers to. Garage door safety sensors prevent the door from closing on people, pets and objects. We restore correct alignment, wiring and operation rather than bypassing a system that exists to protect your household.
Why does my door reverse when there's nothing under it?
Usually the photo eyes are misaligned, dirty or catching direct sunlight, or the wiring to them has a fault. The opener reads any of these as a blocked beam and reverses as designed. We test the whole signal path to find the exact cause.
Is it the garage door sensors or the opener?
Garage door sensor faults have distinct symptoms — flashing opener light, hold-to-close behaviour, blinking garage door sensor lights. Opener faults look different. We diagnose before recommending anything, so you never pay for an opener when a garage door sensor realignment was the answer.
How much does garage door sensor repair cost in Calgary?
It depends on whether the fix is an alignment, a wiring repair or a replacement pair, which we confirm on-site before any work begins. There is no diagnostic or dispatch fee.
How long does the repair take?
Most garage door sensor calls — realignment or a wiring repair — are resolved in well under an hour. A garage door sensor replacement adds only a few minutes, since our trucks carry the common pairs.
Is there an extra charge for evenings or weekends?
No. The quote is the quote — Saturday night or Tuesday afternoon, no emergency surcharge, no weekend fee, no holiday rate. We're available 7 days a week, 7am to 10pm.
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What customers say
Customer Reviews
Door stuck? Spring snapped?