1. Introduction
This manual provides detailed instructions for the installation, programming, operation, and maintenance of your ASONPAO Universal Garage Door Opener Keypad. Please read these instructions carefully before use to ensure proper functionality and safety.

This image displays the ASONPAO Universal Garage Door Opener Keypad in white, with its flip-up cover open, revealing the numeric keypad and the printed programming instructions on the inner surface of the cover.
2. Compatibility
The ASONPAO Universal Garage Door Opener Keypad is designed for compatibility with LiftMaster, Chamberlain, Sears, and Craftsman garage door openers manufactured from 1993 to the present. Compatibility is determined by the color of the learn button on your garage door opener.
- Compatible Learn Button Colors: Purple, Yellow, Red, Orange, Green.
- Replacement for models: 877MAX, 878MAX, 877LM, 377LM, 977LM, 66LM.
- Important Note: This keypad does not support Dip Switch Garage Door Openers or Craftsman Series 100.

This diagram details the wide compatibility of the ASONPAO keypad, indicating its functionality with LiftMaster, Chamberlain, and Sears Craftsman garage door openers. It specifies compatibility based on the color of the learn button (Yellow, Purple, Red, Orange, Green) and corresponding manufacturing years (2011+, 2005-2014, 1997-2005, 1993-1997). It also explicitly states that the keypad does not support Dip Switch Garage Door Openers or Craftsman Series 100.
3. Setup and Programming
Follow these steps to program your ASONPAO Universal Garage Door Opener Keypad.
3.1. Locate the Learn Button
The learn button is typically located on the back or side panel of your garage door opener motor unit. The color of this button is crucial for programming.
- Green/Red/Orange Learn Button: Press the ENTER button 3 times during programming.
- Purple Learn Button: Press the ENTER button 2 times during programming.
- Yellow Learn Button: Press the ENTER button 1 time during programming.
3.2. Program Initial PIN
- Press and hold the * and # buttons simultaneously until the lights on the keypad stop blinking.
- Enter a 4-digit Personal Identification Number (PIN) of your choice. Then press the # button.
- Press and release the ENTER button the number of times that corresponds with your garage door opener type (based on the learn button color):
- 1 time for Security+ 2.0 (Yellow Learn Button)
- 2 times for 315 MHz Security+ (Purple Learn Button)
- 3 times for 390 MHz Security+ (Red/Orange/Green Learn Button)
- To exit programming mode, press the 0 button.
- Press and release the LEARN button on the garage door opener. The Learn LED will light. You have 30 seconds to complete the next step.
- Enter the 4-digit PIN you programmed, and then press the ENTER button. The garage door opener lights will flash or two clicks will be heard.
- To test, press the PIN, then press the ENTER button. The garage door opener will activate.
Note: To program the Keyless Entry to more than one garage door opener, repeat the steps above using a new PIN for each additional garage door opener.
Important: After programming, if you press the PIN then the ENTER button, the door opener will activate. The keypad will remain for 20 seconds. During this 20 seconds, pressing the ENTER button can be used to stop, start, or reverse the door.

This detailed infographic provides a step-by-step guide for setting up and syncing the ASONPAO keypad. It includes instructions on how to locate the learn button on the garage door opener (with variations for Green/Red/Orange, Purple, and Yellow learn buttons), and a 7-step process to program the initial PIN. The steps involve pressing and holding buttons, entering a 4-digit PIN, pressing the ENTER button a specific number of times based on the opener type, releasing the learn button, and testing the activation.
3.3. Change an Existing PIN
- Enter your current 4-digit PIN.
- Press and hold the # button until the lights on the keypad stop blinking.
- Enter your new 4-digit PIN of your choice and press the # button.
- To test, enter your newly programmed PIN, and then press the ENTER button. The garage door opener will activate.
4. Operating Instructions
4.1. Daily Use
To open or close your garage door, simply enter your programmed 4-digit PIN and then press the ENTER button. The keypad features a built-in night light for convenient use in low-light conditions.
4.2. Temporary PIN Function
The keypad supports a temporary password function, allowing you to grant temporary access to guests without sharing your primary PIN. Refer to the programming instructions for setting up additional PINs.

This image contrasts the keypad's appearance during daytime and nighttime, illustrating its built-in night light for visibility in the dark. It also highlights the 'Temporary PIN function' and its weatherproof design, emphasizing convenience and security for various conditions.
5. Maintenance
5.1. Battery Replacement
The keypad is powered by a 9V battery. When the keypad lights dim or become unresponsive, it is time to replace the battery. To replace the battery:
- Open the keypad's flip-up cover.
- Locate the battery compartment, usually at the top of the keypad unit.
- Remove the old 9V battery.
- Insert a new 9V battery, ensuring correct polarity.
- Close the battery compartment and test the keypad.

This image emphasizes key features of the ASONPAO keypad, including its power source (a 9V battery), durable construction (ABS Alloy Shell), quality assurance (100,000+ Rigorous Tests), and extended support (3 Years ultra-long warranty). It also mentions FCC certification and 24-hour Amazon online tech support.
6. Troubleshooting
- Keypad Not Responding: Check the battery. Replace if necessary.
- Garage Door Not Activating After PIN Entry:
- Ensure the correct 4-digit PIN was entered.
- Verify that the programming steps were followed precisely, especially the number of ENTER button presses corresponding to your opener's learn button color.
- Confirm that your garage door opener is compatible (not a Dip Switch model).
- Repeat the programming steps from Section 3.2.
- Difficulty Identifying Learn Button Color: If the learn button color is ambiguous (e.g., an older orange button might function as purple), try programming with different learn button color settings (e.g., try 2 ENTER presses if 3 presses fail).
7. Specifications
| Feature | Specification |
|---|---|
| Model Name | Garage Door Opener Keypad |
| Item Model Number | 878MAX |
| Compatible Devices | 1993-Current Liftmaster, Chamberlain, Sears, Craftsman Garage Door Openers |
| Connectivity Technology | RF (Radio Frequency) |
| Keyboard Description | Multi Functional |
| Special Feature | Universal for 1993-Current Liftmaster Chamberlain Sears Craftsman Garage Door Opener |
| Color | White |
| Style | Modern |
| Material | Acrylonitrile Butadiene Styrene (ABS) |
| Power Source | 9V Battery (included) |
| Item Weight | 5.6 ounces |
| Package Dimensions | 6.65 x 2.8 x 1.77 inches |
| Remote Range | 164 Feet |
| Code Type | Security+ 2.0 Rolling Code |

This graphic provides detailed specifications for the ASONPAO 878MAX keypad, including its working range (164 feet), working voltage (DC9V), frequency (310/315/390MHz), battery model (9V 6F22), shell material (ABS), product weight (0.33 lbs), warranty (3 years), color (White), and code type (Security+ 2.0 Rolling Code). Dimensions are also shown: 11.8 inches length, 2.51 inches width, and 1.1 inches thickness.
8. Warranty and Support
Your ASONPAO Universal Garage Door Opener Keypad comes with a comprehensive warranty and dedicated customer support.
- Warranty: A 3-year warranty is provided, covering product defects and ensuring quality.
- Technical Support: 24/7 online technical support is available.
- Contact: For any queries or support needs, please contact us through our store homepage's "Ask a question" feature or via the provided support email. We aim to respond within 24 hours.

This image features customer service representatives, highlighting the availability of 24-hour Amazon Online Tech Support. It also mentions the product's 3-year warranty and FCC certification, emphasizing commitment to customer satisfaction and product quality.





