First, test general ability to receive commands. Send 3 or 4 setpoint changes from the Alarm.com app or website. Allow a couple minutes in between each. Do these take effect at the thermostat?
We recommend learning in thermostats when they are powered from AC, not just battery. This will ensure the thermostats operate as repeaters in your network, and do not operate in FLIRS mode, causing them to go into power save mode which can affect range and reliability.
Try power cycling the Alarm panel, wait five minutes, then turn off the thermostat schedule in Alarm.com. Wait five more minutes, then turn the schedule back on. Test to see if this was effective.
Finally, check to make sure internal schedules are not enabled which can interfere with Alarm.com schedules. The install or user guide for the thermostat should tell you if the schedule can have an internal schedule or not. Here are a few well-known examples:
CT-30: If internal schedules are enabled, the thermostat will show the time in the upper left corner. If the CT-30 is in COOL or HEAT mode, press the MODE button the right side of the thermostat until it reads OFF. Then, put the thermostat into Simple Mode (internal schedules off) by holding the PROG button for at least 12 seconds.
CT-100: This thermostat does not have internal schedules.
TBZ48A/Linear NTZB48: If the thermostat shows “away” beneath the temperature, internal schedules are enabled. Turn this off by holding the MODE button for at least ten seconds. “Away” will disappear.
TZEMT400: To see if internal schedules are enabled, press and hold the middle two buttons simultaneously until “Installer Settings” is displayed, then scroll to “System Settings” and press select. If “Sched Enable” says “Y”, press the - button until it says “N”, then press “done” to save changes.
Alarm.com Smart Thermostat: This thermostat does not have internal schedules.