LiftMaster 877LM Wireless Keyless Entry Keypad
The LiftMaster 877LM is a wireless keyless entry keypad used with compatible Security+ 2.0 garage door openers. It allows the door to be opened or closed with a personal four-digit PIN.
This keypad is a good fit when the opener is already a Security+ 2.0 unit and the customer wants keypad access without running wires.
Compatibility and Application Notes
The 877LM is commonly associated with LiftMaster, Chamberlain, and Craftsman Security+ 2.0 garage door openers using yellow learn-button technology.
It should not be treated as the same part as an 877MAX universal keypad. For older opener generations, use the opener model and learn button color to choose the correct keypad.
Commonly Associated With
- Select LiftMaster Security+ 2.0 garage door openers with yellow learn buttons
- Select Chamberlain and Craftsman Security+ 2.0 openers using compatible yellow learn-button technology
- Commonly associated with myQ-enabled residential openers using Security+ 2.0 radio technology
Features & Specifications
| Feature / Specification | Details |
|---|
| Manufacturer | LiftMaster |
| Product Type | Wireless keyless entry keypad |
| Part Number | 877LM |
| Application | PIN-code garage door access |
| Security Technology | Security+ 2.0 |
| Learn Button Color | Yellow learn button applications |
| Compatible Operator Type | Select Security+ 2.0 residential garage door openers |
| Notes | Not a universal MAX keypad; verify yellow learn button and operator model |
Also Known As / Related Part Numbers
- G877LMMC
- 877MAX
- 878MAX
- 878MAXMC
- G940EV-P2
Technician Note
The most common ordering mistake is confusing 877LM with 877MAX. If the opener has a purple, red/orange, or green learn button, the 877LM is usually not the correct direction.
Before Ordering
- Confirm the opener has Security+ 2.0 technology.
- Look for a yellow learn button and compatible antenna/wiring style.
- Check the opener model number on the motor head label.
- Do not use 877LM as a universal replacement for older keypad models without verification.
- Make sure the door safety sensors are installed and operating correctly.
Professional Advisory
If the keypad programs but the door will not close, do not bypass safety sensors. Diagnose photo eyes, travel settings, door balance, and opener condition before continued operation.
Product Questions & Answers
What openers does the LiftMaster 877LM work with?
The 877LM is intended for select Security+ 2.0 garage door openers, commonly identified by a yellow learn button.
Is the 877LM a universal keypad?
No. The 877LM should not be treated as a universal keypad. Use 877MAX or 878MAX style compatibility when a broader learn-button range is needed.
Can I use the 877LM on a purple learn button opener?
Generally no. Purple learn button openers are Security+ 315 MHz applications, not standard 877LM Security+ 2.0 applications.
Does the 877LM need a remote to program?
No. Programming is normally done through the opener learn button and keypad sequence.
Why does the keypad light up but not open the door?
The keypad may be programmed to the wrong technology, the opener memory may need clearing and reprogramming, or the opener may have a safety or travel issue.
