Alarm.com Smart Thermostat HD (ADC-T40K-HD)
Quick facts
| Device Image | ![]() |
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| Manufacturer | Alarm.com |
| Power Requirements |
24 VAC with C-Wire |
| Alarm.com Auto Mode | Yes. Requires both heat and cool stages. |
| Local Thermostat Schedules |
Yes. Only when not enrolled to a Z-Wave network. |
| Z-Wave Security 2 (S2) | Yes |
| Z-Wave SmartStart | Yes |
| Z-Wave Enrollment |
If the Z-Wave controller is not SmartStart or S2-compatible, this device can be enrolled in the traditional way as an S0 device.
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| Factory Reset |
To reset using the Display:
To reset without using the Display:If you are unable to use the Display, you may also reset the device to factory settings from the Thermostat. Note: It is recommended to delete the Smart Thermostat HD from the Z-Wave network before performing this reset.
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Installation guides
User guides
How-to troubleshooting guides
Frequently asked questions
Videos
General information
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