Garage Door Opener Safety Sensors
Replacement garage door sensors (safety reversing sensors, also called photo eyes) for LiftMaster, Chamberlain, Craftsman, Genie, Linear, Sommer, Marantec, Hormann, Allstar and Wayne Dalton openers, plus commercial photo eyes. The two sensors sit about 6 inches above the floor on each side of the door. One sends an invisible beam to the other, and if anything breaks the beam while the door is closing, the opener stops and reverses.
Door won’t close or the opener lights blink? Check the sensor lights first. Usually the sensors are just misaligned, dirty or have a loose wire, and nothing needs replacing. The guide below the products shows what each light colour means and how to align them. If a sensor is cracked or stays dark with good wiring, replace it with the sensor kit made for your opener brand: for example the LiftMaster 041-0136 fits LiftMaster, Chamberlain and Craftsman openers made since 1997.
Step by step for every brand: how to fix garage door sensors (light colors, alignment, wiring test). Opener won't run at all? Garage door won't open.
Also here: sensor brackets and sensor guards that protect the eyes from cars, bikes and brooms.
Garage Door Sensor Guards (Pair): Safety Sensor Protector CoversSKU: SENSORGUARDS$34.95 As low as $31.46Sensor Guards are protective covers for garage door safety…
LiftMaster 041-0136 Safety Sensor Kit (Photo Eyes) for LiftMaster and Chamberlain OpenersSKU: 041-0136$38.21 As low as $34.39The genuine LiftMaster 041-0136 is the replacement safety…
Marantec M8-705 Photo Eye Safety Sensor Kit 97246SKU: 97246$54.01 As low as $48.61Genuine Marantec M8-705 photo eye safety sensor kit (part…
LiftMaster 041-0155-000 Safety Sensor Brackets (Pair) for LiftMaster & ChamberlainSKU: 041-0155-000$18.37 As low as $16.53Genuine LiftMaster 041-0155-000 safety sensor bracket kit:…
Allstar 108994 All-Clear Photo Eye Safety Sensor Kit for Allstar & Allister OpenersSKU: 108994$77.94 As low as $68.59Genuine Allstar 108994 All-Clear photo eye kit for Allstar,…
Linear HAE00087 Safety Beam Sensors, Sender and Receiver (Replaces HAE00002)SKU: HAE00087$41.69 As low as $37.52Genuine Linear HAE00087 safety beam set: the sender and…
Hormann EL201 Safety Beam Photo Eyes (Replaces EL101)SKU: EL201$43.12 As low as $38.81Genuine Hörmann EL201 safety beam set — the…
Sommer 7012V001 Safety Sensor Kit (Photo Eyes) with Brackets and 32 ft WiresSKU: 7012V001$49.28 As low as $44.35Genuine Sommer 7012V001 safety sensor kit (photo eyes) for…
LiftMaster CPS-OPEN4 Monitored NEMA 4X Photo Eyes, 45 Ft RangeSKU: CPS-OPEN4$74.12 As low as $66.71Genuine LiftMaster CPS-OPEN4 monitored photo eyes for…
LiftMaster 041A5281-1 Safety Sensor Extension Bracket Kit (Wall Mount)SKU: 41A5281-1$17.99 As low as $16.19Genuine LiftMaster 041A5281-1 safety sensor extension…
LiftMaster CPS-RPEN4 Monitored Retro-Reflective Photo Eye, NEMA 4X, 50 ft RangeSKU: CPS-RPEN4$132.71 As low as $119.44LiftMaster CPS-RPEN4 monitored retro-reflective photo eye…
LiftMaster CPS-U Commercial Photo Eyes, Monitored, 30 ft Range, Indoor (NEMA 1)SKU: CPS-U$107.43 As low as $96.69Genuine LiftMaster CPS-U monitored photo eyes for…
LiftMaster CPICARD Commercial Protector Interface Card (CPI Module, 41K4629)SKU: CPICARD$75.74 As low as $68.17Genuine LiftMaster CPICARD (CPI module, 041K4629). It lets…
LiftMaster 41A6569 Safety Sensor Bracket Kit for 41A4373A Sensors (Brackets Only)SKU: 41A6569$25.37 As low as $22.83Genuine LiftMaster 41A6569 safety sensor bracket kit for…
LiftMaster G21-2LM 2-Strand Bell Wire, Black and White, 22 Gauge, 500 ft RollSKU: G21-2LM$47.85 As low as $43.07Genuine LiftMaster G21-2LM bell wire: a 500 ft roll of 22…
LiftMaster CPS3 Photo Eyes with CPS3 Option Card for Logic 2 and 3 Commercial OperatorsSKU: CPS3$219.58 As low as $197.62Genuine LiftMaster CPS3 Commercial Protector System: photo…
Genie 34879A.S Safe-T-Beam Sensor Bracket (Sold Individually)SKU: 34879A.S$4.33 As low as $3.90Genuine Genie 34879A.S replacement mounting bracket for one…
Digi-Code CR2149 Universal Garage Door Safety Sensors (Photo Eyes) for Most Opener BrandsSKU: CR2149$43.57 As low as $39.21The Digi-Code CR2149 is a universal garage door safety…
Marantec 86141 Wire Holder Kit, 3 Pieces, for Marantec Opener RailsSKU: 86141$8.47 As low as $7.62Genuine Marantec 86141 wire holder kit (3 pieces). Holds…
LiftMaster CPS-UN4 Commercial Photo Eyes, NEMA 4 Monitored, 45 ft RangeSKU: CPS-UN4$213.64 As low as $192.28LiftMaster CPS-UN4 Commercial Protector System: monitored…
What the sensor lights mean
| Sensor lights | What it means |
|---|---|
| LiftMaster / Chamberlain / Craftsman: amber and green both steady | Normal. Amber = sending sensor, green = receiving sensor. |
| Green LED blinking | Misaligned or something is blocking the beam. |
| Amber on, green off | Wiring problem at the receiving sensor. |
| Both off | Wiring problem at the sending sensor, or no power to the opener. |
| Genie Safe-T-Beam: red and green both steady | Normal. Red = sending, green = receiving. |
| Red blinks 2 times | Misaligned or blocked. |
| Red blinks 3 times | Interference, often direct sunlight. |
LiftMaster openers also flash a code: the LEARN button flashes 4 times every 10 seconds, or the up arrow flashes 4 times and the down arrow 6 times, when the sensors are blocked or misaligned.
How to align garage door sensors
- Clear anything in the beam and wipe both lenses.
- Loosen the wing nut on the receiving sensor (green LED).
- Point the two lenses straight at each other until the green LED glows steady, then tighten the wing nut.
- Test: close the door with a 2x4 laid flat in the doorway. The door must reverse when it touches it.
Mount the beam no higher than 6 inches above the floor. If sunlight hits the receiving sensor, swap the two sensors to opposite sides of the door or add a sun shield.
Replacement sensors by brand
| Opener brand | Sensors and parts |
|---|---|
| LiftMaster / Chamberlain / Craftsman | 041-0136 sensor kit, brackets, extension brackets, sun shield |
| Genie | GSTB-BX Safe-T-Beam kit, Series II extension kit |
| Linear / Sommer / Marantec | HAE00087, Sommer 7012V001, Marantec 97246 |
| Hormann / Allstar / Wayne Dalton | EL201, Allstar 108994, 252118 |
| Commercial operators | LiftMaster CPS-U and more monitored photo eyes |
Protect sensors from bikes and bins with Sensor Guards. Need new wire? See opener wire. Questions? Call 877-379-4947.
More help: full garage door sensor guide · door won't open · reset the opener.
