I just check thermostats in the morning and at night and have them double-thermostatted just in case and that has saved my tail once already.
I put the one closest to the outlet just a couple degrees higher as a failsafe for overheating, the one plugged in between that and the actual heat source set normally. If I didn't keep my house heat high enough that they would be 100% fine if they shut off for a day or two, I might have some kind of backup figured out for too cold, but it just doesn't get cool enough here. A room space heater set to a bit below cool-side temps as a backup might be good for people in cooler climates.
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