LiftMaster 041B0873 Safety Sensor Sunblocker Kit – Photo Eye Sun Shields

The LiftMaster 041B0873 Safety Sensor Sunblocker Kit is designed to reduce direct sunlight interference with compatible garage door opener safety reversing sensors.

Strong morning or afternoon sunlight can shine directly into the receiving photo eye and interfere with the infrared safety beam. When this happens, the garage door opener may refuse to close, reverse unexpectedly, or indicate a safety-sensor obstruction even though the doorway is clear.

The 041B0873 sun shields fit around compatible safety sensors to shade the sensor lens while allowing the safety reversing system to continue operating normally.

### Product Features

- Genuine LiftMaster replacement accessory
- Part number 041B0873
- Also known as 41B873
- Helps block direct sunlight from safety sensor lenses
- Reduces nuisance garage door reversals caused by sun glare
- Helps prevent false photo-eye obstruction signals
- Designed for compatible LiftMaster safety reversing sensors
- Compatible with select Chamberlain systems using the same sensor design
- Passive design — no wiring or programming required
- Installs around existing safety sensors
- Does not interfere with normal infrared safety-beam operation
- Safety sensors are not included

### Specifications

- Manufacturer: LiftMaster / Chamberlain
- Part Number: 041B0873
- Previous / Alternate Number: 41B873
- Product Type: Safety Sensor Sunblocker Kit
- Application: Garage Door Safety Reversing Sensors
- Function: Sunlight / Glare Shield
- Power Required: No
- Programming Required: No
- Safety Sensors Included: No

### What Is It Used For?

The 041B0873 is used when direct sunlight interferes with a garage door opener’s photo-eye safety sensors.

A typical symptom occurs when:

- Garage door closes normally at some times of day
- Door refuses to close when sunlight hits the sensor
- Door begins closing and then reverses
- Safety-sensor indicator light becomes unstable in direct sunlight
- Problem occurs mainly in the morning or late afternoon

Installing the sun shields helps shade the sensor lens from direct sunlight while maintaining the required line of sight between the two sensors.

### How It Works

Garage door safety sensors use an infrared beam across the bottom of the door opening.

Direct sunlight hitting the receiving sensor can overwhelm or interfere with that signal.

The Sunblocker Kit creates a shaded area around the sensor lens, helping the receiver maintain a reliable infrared signal from the sending sensor.

No electrical connection or programming is required.

### Compatibility

Designed for compatible LiftMaster and Chamberlain garage door opener safety-sensor systems.

The 041B0873 / 41B873 is commonly associated with LiftMaster photo-eye systems used on residential garage door openers manufactured after 1997.

It may also fit compatible:

- LiftMaster
- Chamberlain
- Select Craftsman openers using compatible Chamberlain-manufactured sensor systems

Always compare the existing safety sensor and mounting configuration before ordering.

### Compatible Safety Sensor Systems

The sun shields are commonly used with compatible sensor systems such as:

- LiftMaster 041A5034 / 41A5034
- LiftMaster 041-0136
- Related compatible LiftMaster / Chamberlain safety reversing sensors

Compatibility should still be confirmed for the exact opener and sensor configuration.

### Important: Does Not Fix Misaligned or Defective Sensors

The Sunblocker Kit is intended specifically for sunlight interference.

It will NOT correct problems caused by:

- Misaligned safety sensors
- Damaged sensor wiring
- Failed photo eyes
- Dirty sensor lenses
- Loose mounting brackets
- Physical obstruction of the safety beam
- Logic-board or opener faults

If the sensor LEDs are unstable regardless of sunlight conditions, diagnose the safety-sensor system before installing a sun shield.

### Safety Sensors Are Not Included

This listing is for the sunblocker / sun shield kit only.

It does NOT include:

- Sending safety sensor
- Receiving safety sensor
- Sensor wiring
- Complete sensor replacement kit
- Garage door opener

If your existing sensors are defective, they must be replaced separately.

### Package Contents

Includes:

- LiftMaster 041B0873 Safety Sensor Sunblocker Kit / Sun Shields

Safety sensors, brackets, wiring, opener, and other accessories are not included unless specifically stated.

### Important Safety Information

The Sunblocker Kit must never be used to bypass, cover, disable, or defeat the garage door opener’s safety reversing sensors.

After installation:

- Confirm both sensor LEDs indicate proper alignment
- Verify the infrared beam remains unobstructed
- Close the garage door
- Interrupt the safety beam while the door is closing
- Confirm that the opener stops and reverses as required

Never operate an automatic garage door opener with disabled or improperly functioning safety sensors.