Originally Posted by ctrlfreq
The question now is, since an actual failure of either thermostat would kill power to the rack completely, is it really a backup, or just a dead-man's switch
Hmm...I'm not sure the definition of a dead-man's switch. The value of the thermostat can be explained in terms of "expected value" of the outcome, which I followed through in painful detail in another post.
Put succicently: You have one thermostat and it fails in ON position, your snakes die. You are out potentially thousands of dollars, many hours/years of time investment, loss of breeding plans, not to mention any emotional trauma you may endure at the thought of your collection cooking. You have two thermostats and it fails in OFF position, your snakes get a little bit chilly, but are otherwise fine.
JonV
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