Smart Themostat - Power Failures

I keep getting power failures on my newly installed ADC T2000. Every couple of days it claims a power failure and then 3-4 hours later, that the power has been restored. I have double checked connections, everything is good. Any idea of what to look for next?

I have double checked connections, everything is good. Any idea of what to look for next?

Make sure to check on both the Tstat and HVAC ends. HVAC service or maintenance workers may jostle the wires and quite often they will not check the C wire (required for power) to ensure it is tight and secure in the HVAC terminals.

It would be good to power down your HVAC, remove the C wire, cut and expose fresh wire, then reattach firmly.

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