To Next PageTo Next PageWhat to do if the Chamberlain LiftMaster Professional 1255LMCR-2 receiving eye indicator light doesn't glow?
If the sending eye indicator light is on, but the receiving eye indicator light is not, you should check the alignment of the sensors and inspect the receiving eye for any open wires.
Why is the Chamberlain Garage Door Opener receiving eye indicator light dim?
If the receiving eye indicator light is dim, try realigning either sensor.
How to fix Chamberlain LiftMaster Professional 1255LMCR-2 Garage Door Opener if the sending eye indicator light does not glow?
If the sending eye indicator light doesn't glow steadily after installation, check the following: 1. Ensure the opener has electric power. 2. Look for shorts in the white or white/black wires, especially at staples or opener connections. 3. Verify correct wiring between the sensors and the opener. 4. Check for any broken wires.
General| Type | Chain Drive |
|---|---|
| Horsepower | 1/2 HP |
| Max Lift Height | 7 ft |
| Remote Control | Yes |
| Warranty | Lifetime motor warranty |
| Voltage | 120V |
| Frequency | 60 Hz |
| Motor Type | AC |
| Battery Backup | No |
| Security+ 2.0 Rolling Code Technology | Yes |
| Works with MyQ | Yes |
| Safety Features | Safety Sensors |
| Security | Rolling Code Technology |
Explains safety symbols and signal words used for hazard identification in the manual.
Critical safety warnings and general guidelines to follow before and during installation.
Guides on determining header bracket location and installing it securely.
Procedures for wiring door controls, installing the light, and mounting safety sensors.
How to set door stop points and regulate opening/closing force for optimal performance.
Crucial tests to ensure the safety reversal and protector systems function correctly to prevent injury.
