Can one of these units independently control two garage doors? The manual doesn't mention that at all.

Yes. I have a 2014 GMC Acadia, a 2006 GMC Envoy, and two Liftmaster 8355W garage door openers. One bridge is all I needed. Just keep repeating the programming instructions until all the buttons are completed. I only had to program each vehicle button once and then all four buttons worked.

Does anyone know what the "indicator light" is on the repeater? When plugged into the AC socket, it flashes rapidlly in a random pattern.

Yeah, I was confused as well, that yellow LED on the wall unit (repeater) is not constantly on, but pulses in somewhat random fashion, was thinking the unit is dead, but that is how it is I guess. I plugged it in the ceiling outlet to shorten the distance to the garage door opener...

I have a new Homelink Repeater. Why does the LED constantly flash and transmit causing same LED flashing on motorhead when it should be 100% idle?

Repeater is the link from car to door opener, they communicate constantly. Codes are always changing so someone doesn't steal your opener code.

Does this have to be in a specific location within the garage?

I’m not sure if that’s a requirement, but I have mine plugged into the same outlet as the garage door opener and it works great. It would definitely be a safer bet to plug it in closer rather than not.

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855lm Homelink Repeater Kit

Product ID: 31624534

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Details

Brand
LiftMaster
Special Feature
Advanced
Color
Black
Included Components
Instruction
Item Weight
0.08 Pounds

📶Advanced Signal Processing

🔄Multi-Opener Compatibility

🚗Seamless Vehicle Integration

Description

🚀 Upgrade your garage game with seamless smart signal power!

MULTI DEVICE MASTERY - Program multiple garage door openers effortlessly with one repeater kit.
COMPACT LIGHTWEIGHT - Sleek 6x4x1.5 inch design weighing just 1.28 ounces fits anywhere discreetly.
FUTURE PROOF SECURITY - Leverages advanced signal processing to keep your garage access secure and reliable.
PLUG PLAY SIMPLICITY - Includes a learning remote and repeater for quick, hassle-free setup.
UNIVERSAL SIGNAL UPGRADE - Transforms incompatible HomeLink signals into Security+ 2.0 for flawless garage access.

The LiftMaster 855lm Homelink Repeater Kit converts non-compatible HomeLink signals into Security+ 2.0, enabling seamless integration with multiple garage door openers. Compact and lightweight, it includes a repeater and a learning remote for easy programming, ensuring advanced, secure, and reliable remote garage access for vehicles equipped with HomeLink.

Specifications

Manufacturer	Sentex/Chamberlain Brands
Part Number	855lm
Item Weight	1.28 ounces
Product Dimensions	6 x 4 x 1.5 inches
Item model number	855lm
Batteries	1 Unknown batteries required.
Is Discontinued By Manufacturer	No
Color	Black
Item Package Quantity	1
Special Features	Advanced Signal Processing, Remote Management
Included Components	Instruction manual
Batteries Included?	No
Batteries Required?	No
Battery Cell Type	Lithium Manganese Dioxide

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