Sound familiar?Markland Woods
- The call
- Since shelving went up along the garage wall, the door will not close and both sensor lights are dead. A screw or staple may have gone through the thin wire that runs from the opener to the sensors.
In plain words
Two small sensors face each other across the doorway: one sends an infrared beam, the other receives it. While the beam lands on the receiver, the opener will close the door; the moment anything interrupts it, the door stops and returns to open. Every sensor call comes down to why the receiver has lost the beam: an object, a bent bracket, a dirty or frosted lens, sun in the receiving eye, a broken wire or a tired sensor. The technician works through those in order, fixes the one that applies, and shows you the steady indicator lights that mean the pair is talking again.
Photo-Eye Sensor Alignment or Replacement · Markland Woods
How the visit goes
Scene 1
Making sure it is the sensors and not the door
A door that reverses on the way down has two possible reasons, and only one of them lives at the floor. If the door touches something, including a bottom seal frozen to the slab, a travel limit set slightly long or a stiff door in cold weather, the force setting sends it back up. That looks like a sensor fault from the driveway but calls for a different fix. The technician checks whether the door reverses before it moves or after it meets resistance, watches the sensor lights during the cycle, and tries the door with the beam deliberately shaded. The answer decides whether the work stays with the sensors or moves to the settings.
Scene 2
Proving it with the two tests
No sensor job is finished on a steady light alone. The door is closed from the wall control and from a remote, and while it is on its way down an object is passed through the beam; the door must stop and return to fully open. Then a 2x4 is laid flat on the floor under the centre of the door and the door is closed onto it; it must reverse on contact. Both are repeated, the opener's diagnostic light is confirmed clear, and any app or hub reporting a sensor code is refreshed. The customer watches the tests so the normal behaviour is seen, not described.
Scene 3
Two lights to glance at
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.
In the van
- Receiving-eye sun shade
- Wing nuts and carriage bolts
- Wire connectors
- Multimeter
- Protective wire channel
What shapes the quoteApplewood Hills Garage Door Co.
- Access to the doorway and the head unit
- A clear strip along the floor and a reachable head unit make for a direct job. Shelving, vehicles or stored goods that must be moved to reach the sensors, wire or terminals add time.
- Corrosion reaching the head unit
- Where salt and water have travelled up the wire to the terminals, or the sensor terminals on the board are damaged, the repair extends beyond the pair and that is set out separately.
- Force and travel adjustment alongside
- If the reversing turns out to involve a travel limit set long or a force setting made in summer, adjusting and re-testing those settings is included as a small extra step.
FeesSame any hour
What people ask us
How long does a sensor visit take?
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.
Do both sensors get replaced together?
Yes. The sending and receiving sensors are made and sold as a matched pair for a given opener family, and the head unit expects both to be from the same generation. Fitting a pair also means both lenses, both indicators and both mounting points are fresh at the same time, so the alignment holds and the next check is simpler. A single sensor from an unrelated kit is where mystery faults come from.
How high off the floor should the sensors sit?
Low. The industry checklist expects the beam no more than roughly 15 cm (6 in) up from the floor, so that a small child, a pet or a bicycle wheel breaks it. Both sensors are set at the same measured height and level with each other, since a difference of a couple of centimetres is enough to lose the beam. Within that rule the technician can raise them a little to keep them out of the strip where slush collects.
Openers & Access
- Chain-Drive Opener RepairThe door closes, touches the floor, then climbs straight back up as if it hit something.
- Belt-Drive Opener RepairThere is a new squeal from the front of the rail, up near the header, on every cycle.
- Garage Door Opener ReplacementDuring the ice storm the power was off for two days.
- Garage Door Remote and Keypad ProgrammingAfter the move, the previous owner's remotes are somewhere in another city and the keypad on the outside wall wants a code nobody…
- Smart Garage Controller SetupThe house came with a controller already screwed to the garage ceiling and a sensor on the door, but the app insists the device…
Markland Woodsinformation
PeelOntario
Photo-Eye Sensor Alignment or Replacement · Mississauga, Applewood Hills, Orchard Heights, Applewood Heights
- Town
- Markland Woods, Peel
- In business
- 24 years
- Hours
- Open 24/7
- Nights, weekends and holidays, same fees
- Phone
- (289) 805-3301
- Visits
- On-site assessment preferred. Request a visit or call.
2021 census: what it means at the door
Every square is one home in a hundred.
- 38 in 100 homes · mixed ages
- 37 in 100 homes · mostly attached
- About 38% of homes in Mississauga were built in 1980 or earlier, according to the 2021 Census.In a mixed neighbourhood, some garages are detached with plenty of side room and others are tucked under a bedroom with little headroom, so opener and spring choices vary from house to house. Measuring at the door, rather than assuming, is how the right hardware is chosen.
- Single-detached houses make up about 37% of homes in Mississauga (2021 Census).Condo and townhouse garages are frequently used for storage as much as parking, with the door opened many times a day, and the shared walls mean vibration travels. A well-balanced door, tight hardware and a quiet opener are the upgrades residents notice most.
On-site assessment
Request a visit.
Since shelving went up along the garage wall, the door will not close and both sensor lights are dead.
(289) 805-3301, open 24/7.