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Sure, but we've had that level of automation for decades. My Honeywell programmable thermostat has time/day scheduling with several phases per day, and differe
by thrownaway2424 11y ago
Sure, but we've had that level of automation for decades. My Honeywell programmable thermostat has time/day scheduling with several phases per day, and different phases for the weekend. It runs off a 9V battery and I can't tell you how long the battery lasts but I _can_ tell you that it's at least 15 years.
- greenyoda 11y agoIt would be pretty rare for a 9V battery to last for 15 years of continuous operation. In my thermostat, which has features similar to yours, the battery is just for backup in case the power goes out, and the thermostat normally runs off the 24V power from the furnace circuit (it works fine if you remove the battery). It's possible that your thermostat works the same way and your battery has been dead for many years.
- thrownaway2424 11y agoThat could be, but even if the battery is dead or leaking the thing trucks along and works fine.