LiftMaster 8155 electric garage door operator

This LiftMaster Professional Series garage door opener offered by Door Doctor is the ideal choice for dependable performance. Its durable 1/2 HP motor combined with an industrial-strength belt drive provide smooth, steady performance year after year. 

All LiftMaster Openers and Operators should be professionally installed.



  • Confidently know what’s going on at home with MyQ® Technology. It lets you monitor and control your Garage Door Opener and home lighting from anywhere (when paired with the Internet Gateway).
  • Receive email or text alerts so you always know the status of your garage door and home lighting.
  • Download the MyQ® mobile app for free. No annual activation fee required.


  • Rely on durable and powerful performance with our P3 Motors™, which are specifically built for use in Garage Door Openers.
  • Appreciate years of reliable, maintenance-free service from our powerful yet ultra-quiet, AC motor Belt Drive System.
  • Consume up to 75% less power in standby mode.
  • Have peace of mind with our four-year motor, ten-year belt and one-year parts warranties.
Safety and security
  • Safeguard your household with Security+ 2.0™- with every click, a new code is sent to the Garage Door Opener, so the door opens only for you.
  • Stay out of harms way with audio and visual warnings when the garage door is about to close.
  • Prevent the door from closing if anything interrupts the safety beam that crosses the garage door opening.
  • Lock down your garage door against a forced opening with PosiLock®.
Included accessories

1-Button Remote Control (891LM)

Allows you to control a single
garage door opener, gate operator
or MyQ Light Accessory. With
Security+ 2.0™, you are assured of a
new code with every use.

Multi-Function Control Panel (882LM)

Allows you to program remote
controls, keypads and MyQ Light
Accessories from the control
panel. Includes lockout remote
controls for added security.

Optional accessories

Internet Gateway (828LM)

Connect your MyQ-Enabled
Garage Door Opener and
Accessories to the Internet with
this device and the free MyQ app.

Ceiling Mount (195LM)

Give your garage the style it’s
been missing by hiding the wires
and cords with this sleek ceiling
mount. Works in most standard

Remote Light Control (825LM)

Allows you to control any lamp
with your garage door opener
remote control or smartphone
via the Internet Gateway and
the free MyQ app.

Door and Gate Monitor (829LM)

Enables you to monitor and close
up to four garage doors or gates
from any room in your house.