Liftmaster K101B0159-3, CALL BUTTON, SILVER
The LiftMaster K101B0159-3 is a silver call button actuator used in select LiftMaster/Sentex telephone entry system button assemblies, most commonly associated with EL25 parts listings. The actuator is the front-facing piece that receives the visitor press and transfers that movement to the internal switch or call button board. When the actuator is cracked, worn, loose, faded, or sticking, the system may feel unreliable even if the internal electronics are still working. Replacing the actuator can restore the correct button feel and appearance when the underlying switch board and wiring are still serviceable. This part must be matched by finish, button style, and installed entry-system assembly. It should not be confused with the call button circuit board, keypad buttons, or full faceplate/display components.
Compatible With
Common supported applications
- Select LiftMaster EL25 telephone entry system call button assemblies
- LiftMaster / Sentex telephone entry systems using the matching silver or nickel call button actuator
- Entry-system repair applications where the parts breakdown calls for K101B0159-3
Related call button assembly references
- 041A0159 - related silver call button actuator reference in some listings
- 101A159 / 101A159-1 - related actuator references
- 41B995 - related call button board, not the same as the actuator
- 177A0166 - related call button spring, not the same as the actuator
- 158A0094 - related call button e-ring, not the same as the actuator
Features & Specifications
| Manufacturer | LiftMaster / Chamberlain Group |
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| Product Type | Call button actuator |
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| Part Number | K101B0159-3 |
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| Application | Visitor call button repair for select telephone entry systems |
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| Common System Family | EL25 telephone entry parts |
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| Material / Finish | Silver / nickel style finish depending on production reference |
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| Included Components | Button actuator only unless current listing states otherwise |
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| Notes | Does not replace the call button board or keypad electronics |
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Also Known As / Related Part Numbers
- K101B0159-3
- 101B0159-3
- 101B159-3
- 101A159-1
- 041A0159 related silver actuator reference
- LiftMaster call button actuator silver
- LiftMaster call button actuator nickel
Technician Note
If a visitor call button is not working, do not assume the actuator is the only failed part. Check whether the actuator is physically sticking and whether the internal button board, spring, e-ring, wiring, and programming are still functioning.
Before Ordering
- Confirm the entry system uses the matching EL25-style call button assembly.
- Compare the finish and actuator shape to the existing button.
- Determine whether the problem is cosmetic, mechanical, or electrical.
- Do not order the actuator when the failed part is the call button board.
- Inspect related spring and retaining hardware if the old button is loose or does not return properly.
Important Ordering Warnings
This is the external call button actuator, not the internal switch board. A non-working call function may require additional diagnosis of the board, wiring, relay, phone line, or programming.
Professional Advisory
Gate operator covers, brackets, actuator parts, battery trays, and access-control button parts should be installed with the equipment power safely disconnected and the gate secured from movement. For high-voltage wiring, damaged moving gate hardware, or unsafe operation, use a qualified gate technician rather than bypassing safety devices or forcing the operator to run.
Product Q&A
What system is K101B0159-3 commonly used with?
It is commonly associated with LiftMaster/Sentex EL25 telephone entry system call button assemblies.
Is this the same as the call button board?
No. This is the actuator button piece. The call button board is a separate electronic component.
What related numbers should I compare?
Related references include 101B0159-3, 101B159-3, 101A159-1, and some 041A0159 silver actuator listings.
Will this fix a call button that does not dial?
Only if the problem is mechanical at the actuator. Dialing problems can also involve the switch board, wiring, phone service, or programming.
Does finish matter?
Yes. Match the original button finish and style so the actuator fits and looks correct on the entry-system faceplate.
