August Smart Lock Pro 3rd Gen
Exact model ASL-3B
Also identified as: August Smart Lock Pro 3rd Generation, ASL-03, ASL-3, August Pro Gen 3
August ASL-3B Smart Lock Pro third generation retrofits the inside of a compatible single-cylinder deadbolt and adds Bluetooth, Z-Wave Plus, HomeKit, and DoorSense.
- Exact catalog identity
- ASL-3B Smart Lock Pro third generation
- Installation
- replaces only the interior thumbturn on a compatible single-cylinder deadbolt
- Exterior hardware
- existing key cylinder remains available
- Power
- four AA alkaline batteries
- Direct radio
- Bluetooth
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Information checked August 27, 2026. Confirm critical specifications with the manufacturer.
Official resources
Manuals and official support
Replacement parts and accessories
Products for August ASL-3B
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Model details
Additional useful information
Use this Scanual guide to identify August Smart Lock Pro 3rd Gen, follow official setup and reset guidance, and match power, radio, mounting, hub, and regional accessories to model ASL-3B.
August ASL-3B Smart Lock Pro third generation retrofits the inside of a compatible single-cylinder deadbolt and adds Bluetooth, Z-Wave Plus, HomeKit, and DoorSense.
Setup: Confirm the existing single-cylinder deadbolt and tailpiece against August's compatibility guide, install the matching adapter, keep the exterior lock in place, add ASL-3B in August, and calibrate DoorSense.
Reset: Use the August app's Factory Reset under lock settings while authorized as an owner. A reset removes virtual keys, calibration, integrations, and network relationships, so transfer ownership through the app when possible.
Troubleshooting: For jams, operate the deadbolt manually with the lock removed, check adapter seating and mounting-plate alignment, install four fresh AA cells, then recalibrate lock travel and DoorSense.
Compatibility and ecosystem boundary: ASL-3B has Bluetooth, Z-Wave Plus, and HomeKit but not built-in Wi-Fi. Fourth-generation CR123 batteries, smaller mounting parts, and native Wi-Fi instructions do not fit this lock.
Maintenance and accessory matching: Use four matched AA alkaline cells, the correct tailpiece adapter, and an ASL-3-compatible DoorSense. Regional Z-Wave frequency and hub certification must match before adding it to a Z-Wave network.
Published checkpoints: Exact catalog identity: ASL-3B Smart Lock Pro third generation. Installation: replaces only the interior thumbturn on a compatible single-cylinder deadbolt. Exterior hardware: existing key cylinder remains available. Power: four AA alkaline batteries. Direct radio: Bluetooth. Hub radio: Z-Wave Plus for a compatible regional Z-Wave system. Apple ecosystem: HomeKit support on this generation. Remote August access: requires August Connect unless a supported ecosystem hub supplies its own remote path. Door state: included DoorSense magnet requires calibration. Setup: August app selects the correct tailpiece adapter and calibrates lock travel. Reset: factory reset is initiated from the August app with ownership authorization. Boundary: not the fourth-generation Wi-Fi lock and has no built-in Wi-Fi.
- Hub radio: Z-Wave Plus for a compatible regional Z-Wave system
- Apple ecosystem: HomeKit support on this generation
- Remote August access: requires August Connect unless a supported ecosystem hub supplies its own remote path
- Door state: included DoorSense magnet requires calibration
- Setup: August app selects the correct tailpiece adapter and calibrates lock travel
- Reset: factory reset is initiated from the August app with ownership authorization
- Boundary: not the fourth-generation Wi-Fi lock and has no built-in Wi-Fi
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