Photo eyes aligned and cleaned
Brackets are re-set so both eyes look straight at each other, lenses are cleaned, and the reversal is tested with an object in the opening while you watch.
Sensor and Keypad Repair
A door that refuses to close, an opener that reverses in the last few inches, or a keypad that quit in the middle of summer are control faults far more often than dead motors. Chandler Garage Door Experts traces the problem from the photo eyes back through the wiring before anything gets replaced.
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Signs Pointing at the Sensors or Controls
- The door starts down, stops and runs back up
- The opener light blinks over and over and nothing moves
- The door only closes while you hold the wall button down
- The keypad beeps but the door ignores it
- The remote works and the keypad does not, or the reverse
- One photo eye glows a different color from the other
The two photo eyes sit a few inches above the floor at either side of the opening, which is exactly where bikes, trash bins, storage tubs and a stray broom handle knock them out of line. A fraction of an inch is enough. Add the low winter sun coming straight in through an east or west facing opening, and the film of monsoon dust that settles on the lenses, and you have the three most common reasons a door in Chandler will not close.
What the Service Includes
The point is to find the actual break in the chain between the button you press and the motor overhead, rather than swapping parts until something works.
Low-voltage wiring traced
The thin sensor and button wiring runs along the wall and up to the opener on staples. Heat makes old insulation brittle, and a pinched or nicked wire behaves exactly like a failed sensor.
Sun and dust interference ruled out
Direct afternoon sun on a receiving eye and a dusty lens both produce the same symptom as misalignment. Shields, repositioning or simple cleaning often settle it.
Wall button and its terminals
A wall control that has stopped working, or one that works only when held, is checked at the button and at the opener terminals before the logic board is blamed.
Keypads and remotes
Batteries cooked by garage heat, worn keypad membranes and codes lost after a power cut are all common. Units are tested, reprogrammed or replaced with something the opener accepts.
Opener travel and force settings
Limits set too far and force settings turned too low make a healthy door reverse on its own. These are checked and adjusted with the door running.
Repair, Replace or Look at the Door
Most sensor and keypad faults are a repair: a bracket, a length of wire, a keypad or a pair of eyes. Replacement of the whole opener only makes sense when the parts for that model are no longer made, or when the board itself has failed alongside everything else.
It is also worth remembering that a door can cause these symptoms without any control being at fault. A binding track, a worn roller or a spring that no longer carries the weight makes the opener meet resistance and back off exactly as it is designed to, so spring repair and cable and roller repair get ruled out as part of the same visit. Where the motor itself is the problem, the work moves to opener repair, and our opener troubleshooting guide covers what you can safely check first.
If the opener is old enough that boards and remotes are getting hard to find, the repair versus replacement guide is the right place to start. A yearly tune-up includes a sensor and reversal test, and service runs across the East Valley including Tempe. Request a visit and mention the brand on the motor housing if you can read it.
Sensor and Keypad Questions
Why does my garage door close a few inches and then go back up?
The opener has been told something is in the way. Nine times out of ten that is the photo eyes — out of alignment, dirty, or with a damaged wire — and the rest of the time it is a travel or force setting, or a door that is binding on its way down. Chandler Garage Door Experts checks all three rather than guessing. If the door also feels heavy by hand, read the spring repair page first.
Can I just disconnect or bypass the safety sensors?
No. The photo eyes are the safety feature that stops a closing door on a child, a pet or the back of a car, and bypassing them removes that protection entirely. If the door has to be closed before it can be repaired, the safe route is to close it and leave it closed until someone looks at it. See how a visit is arranged.
Why did my garage door keypad stop working?
Usually the battery. A keypad bolted beside an opening that bakes all afternoon goes through batteries quickly, and the contacts corrode. After that come worn keys and codes lost when the power dropped during a monsoon storm. Chandler Garage Door Experts tests the keypad, reprograms it where it can be saved and fits a compatible replacement where it cannot.
What affects the cost of sensor or keypad repair?
Whether it is an alignment, a wiring repair, a new pair of eyes or a new keypad, and whether the opener needs adjusting as well. Because the fault is found before anything is quoted, you approve a specific repair rather than a guess. Browse the rest of the garage door services if more than one thing is going wrong.
Arrange sensor and keypad repair in Chandler
Tell us what the door does when you press the button and whether the opener light blinks, and the visit can be planned around the parts it is likely to need.