Sound familiar?Peterborough
- The call
- After a cold night the door stays open until the garage warms up. There is frost on the sensor lenses and a ridge of salty slush piled against the brackets where the snow blower was parked.

Some sensor problems keep a schedule. A receiving eye that faces the low sun on winter mornings is flooded with light and loses the beam until the sun moves on, and a lens that frosts overnight in an unheated garage clears itself by noon. The service sorts these out for good: the sensors are swapped side to side so the receiver faces away from the light, or a small shade is fitted, and lenses and brackets are cleaned and reset above the line where slush collects. The door then closes at any hour of the day and in any month.
Sound familiar?Peterborough
Photo-Eye Sensor Alignment or Replacement · Peterborough

Scene 1
The first minutes are spent listening. What does the door do when close is pressed: drop and bounce, stay put, or close only while the wall button is held? Does the opener light blink, and how many times? When did it start, and what changed around then: a car bumped the track, a storm, shelving went up, the garage was reorganised, the first frost arrived? Does it happen at all hours or only on bright mornings? Those answers usually point at one of a handful of causes before a single tool comes out, and they decide whether the technician heads for the brackets, the wire or the head unit first.
Scene 2
Lenses are wiped with a soft cloth and a mild cleaner, never scraped, and the housings are checked for cracks that let in water. Sensors that have been sitting in the strip where slush and salt collect are raised within the permitted height range and their brackets sealed. On a wall where the wire runs exposed, a slim protective channel keeps it clear of bins and bikes. Where mice have been at the wire, the new run is routed higher along the wall and dropped straight down to each sensor. These small measures are what keep a repair from repeating the following winter.
Scene 3
You leave knowing what normal looks like at the floor. Most sensor pairs carry a small indicator on each side, often in different colours for sender and receiver, though some older pairs light only the receiver; the model's own chart tells you what steady and flickering mean. A dark or flickering light on the receiving side means the beam has been lost, usually because a bracket was bumped or something is in the path, and two dark lights mean the pair has lost power along the wire. A glance at those lights before calling anyone tells you most of what the technician would look at first, and often the fix is moving whatever is leaning on the bracket.
What shapes the quoteOtonabee Garage Door Services
FeesSame any hour
Alignment, cleaning and a bracket adjustment are done inside an hour on most doors, including the two tests at the end. Replacing the pair adds a little for wiring and setup. Re-running the wire all the way from the motor to both sensors is the part that stretches a visit, especially where the wire is behind a finished ceiling or the garage is full. Having the floor by the door clear before arrival helps.
It is a built-in stopgap, not a repair. When the sensor circuit is not satisfied, many openers allow a close from the wall control only while the button is held, on the idea that a person standing there can see the doorway. Newer units drop that behaviour altogether and simply hold the door open. Either way the door is telling you the beam has failed, and a sensor visit puts remote closing back.
They do, slowly. The infrared emitter and the receiver dim over many years, lenses craze or cloud from sun and salt, housings crack, and water finds its way in at floor level. A pair that needs re-aligning more and more often, or whose light drifts between steady and flickering with nothing touched, is usually ageing. Because pairs are matched to the opener, an older opener is worth identifying early so the right replacement is on hand.
PeterboroughOntario
Photo-Eye Sensor Alignment or Replacement · Cavan Monaghan, Otonabee-South Monaghan, Ashburnham, Byersville, Claraday, Coldsprings, Collison Heights, Downers Corners, Greenhill, Jackson Heights, Kawartha Heights, Westmount
Every square is one home in a hundred.
On-site assessment
You press the remote, the door drops a few centimetres, then climbs straight back to the top while the opener light blinks.
(249) 494-2181, open 24/7.
On-site assessment preferred · (249) 494-2181, open 24/7