Liftmaster EL1SS Access Control Parts
LiftMaster EL1SS Replacement Parts
Genuine LiftMaster replacement parts for the EL1SS telephone entry system — the single-line stainless steel entry unit with keypad, speaker and call button. Use the exploded diagram above to find the key number for the part you need, then click any part number in the tables below.
Two part numbers differ from the printed guide. The speaker ships as K002B1598-1, and the bypass board is stocked under its Sentex number SN1600341-K. Both are the correct current parts for the EL1SS.
Two lock kits, different jobs. K002B0799-4 is the lock and key kit for the EL1SS enclosure; K002B0799-3 is the cam and lock kit, also used on the CAPXL.
The EL1SS is a telephone entry system, not a gate operator. It signals a separate operator to open — if the gate itself is not moving, the fault is more likely at the operator than here.
Common EL1SS Faults
| Symptom | Usual cause | Parts to check |
|---|---|---|
| Unit dead, no display or tone | Transformer or main board | K002B0821-1 transformer, K001D7121-1 main board |
| Keys unresponsive or intermittent | Keypad worn or membrane failed | K002B1597-1 keypad |
| No audio, or visitor cannot be heard | Speaker | K002B1598-1 speaker |
| Call button does nothing | Call button assembly | K101C0232-1 call button |
| Gate will not open on entry code | Main board relay, or the operator itself | K001D7121-1 main board — check the operator first |
| Need to open the gate with phone line down | Bypass board not fitted or failed | SN1600341-K bypass board |
| Lock seized or keys lost | Lock and key kit | K002B0799-4 lock and key kit |
Entry System Repair & Service Parts
| Ref | Part # | Description |
|---|---|---|
| 1 | K001D7121-1 | Main Board, EL1SS |
| 2 | K002B1597-1 | Keypad, EL1SS |
| 3 | K002B1598 | Speaker, EL1SS — supplied as K002B1598-1 |
| 4 | K002B0799-4 | Lock and Key Kit, EL1SS |
| 5 | K101C0232-1 | Call Button, EL1SS |
Parts Not Shown in Diagram
| Ref | Part # | Description |
|---|---|---|
| — | KSN1600341B | Bypass Board, EL1SS — stocked as SN1600341-K |
| — | K002B0821-1 | Transformer, EL1SS |
| — | K002B0799-3 | Cam and Lock Kit |