Use My Leviton and the instructions for the exact control generation.
This procedure applies to DW15S hardwired switches and DW15P plug-in controls in the linked first-generation manuals. Their manuals list 2.4 GHz and 5 GHz WiFi with WPA/WPA2 security; do not apply a universal 2.4-GHz-only rule or assume every newer Leviton model uses the same pairing sequence.
- Install/update My Leviton, sign in and select Add Device. Confirm a strong WiFi signal at the control and follow the app’s instructions.
- Look for the flashing green enrollment indicator. For DW15S, holding the top paddle for seven seconds until amber, then releasing, starts enrollment mode.
- If connection fails, check the selected network/password, signal and internet connection, then record whether failure occurred at device discovery, WiFi joining or account/cloud enrollment.
- Use factory reset only when needed: on these models, hold the appropriate paddle/button through amber until it rapidly flashes red/amber at about 14 seconds, then release. This resets the device; plan to enroll and configure it again.
Use the DW15P button rather than a wall-switch paddle. Bluetooth, Z-Wave, HomeKit and later-generation controls need their own instructions. After setup, verify schedules and automatic shutoff settings before relying on a heating-control application.
Sources: DW15S installation instructions and DW15P manual.