will the HVAC system really shut down if the batteries go dead?
2073490
The unit requires power in order to control the HVAC system. Page 57 in the manual: Review Battery Tips 1. Replace the batteries as soon as LO Batt flashes in the display. The LO Battery indicator flashes in the display one month before the batteries run down completely. 2. Always use fresh AA alkaline batteries. Non-alka- line batteries do not last as long and can leak, causing thermostat damage. 3. Although the thermostat has a Low Battery indica- tor, replace the batteries once a year to prevent the thermostat and heating/cooling system from shut- ting down due to lack of battery power. 4. As a precaution, replace the batteries when leaving your home for more than a month to prevent your heating/cooling system from shutting down if the batteries run down completely.
2073491
Yes, but only if you don't connect the COM common wire to provide power to the unit if the batteries die. If at all possible, make sure to connect that wire so the furnace won't go dead when you need it most. It may mean running another wire from the furnace to the thermostat. But it's worth it in the long run.
918764
it shuts off completely. I have mine set as low as it goes and keeps things very comfortable. It turns on automatically to keep the temp constant.
167152
It is supposed to auto shutoff after a specific time of inactivity. If it is running batteries down everyday, it has an errorand should probably be sent back
1838964
Yes it completely shuts off when battery is charged, and restarts if battery discharges below a set point.
488085
As all have said,it depends upon the load. More than long enough to close things out and shut it all down. The best features are the program that will shut it down for you if you walk away with other programs running and files open, and the fact that the batteries also serve as a power conditioner. As well as suppressing surges, it will also supply extra power when your service is under voltage, extending the life of your equipment.
83497
The batteries do get warm as you might expect when recharging quickly. Its fan does shut off after a while and it appears to do what it should I would buy another 1 or 2 no problem.
1846373
Im in MA. I store my batteries in an unheated garage for several years since ive bought it....no issues thus far. But i agree that they are so small....so if you are worried, just bring them into the house when it gets really cold.
1729603
Hello I believe you may unhook the batteries any time, as the same happens when the battery is full, it automatically shuts down, Thanks John
1729604
HelloI believe you may unhook the batteries any time, as the same happens when the battery is full, it automatically shuts down,ThanksJohn
276163
Although that would be true, as it's common sense that if the battery dies during a watering cycle, there is no power to close the valve. However, there is a battery light indicator. I ran mine an entire growing season last year on one set of batteries. I think you're worrying to much. Just change the battery when it says they are getting low.
896312
Jim I have this thermostat with a battery installed and it does sustain through power failures.
138841
Ashley,You would have to keep air circulating around the inverter or it will get hot and shut down.Joe
34727
David Wardle answered your question correctly. If you exceed these limits however the unit will shut down and the battery won't charge. It will not burn up the unit.
2243844
I have charged dead batteries with it. I would say it depends on what caused the batteries to die. Individual batteries may well be beyond recovery of any charging means. Let me say that if the batteries are recoverable, this system will desulfinate them to maximum normal remaining life
640649
If it see any trouble it will kill all power. Love mine! I'm sure it has saved me money from bad power.
1110432
It's battery powered, it will not source the 24V from an HVAC. That said, it lets you know when the batteries are going low, I seem to get around 5yrs+ on a pair of AAs.
896311
Yes the thermostat's batteries retain the its settings during power outages. These batteries run down in about 1 day unless external power is applied however. The power from the thermostat wiring must be supplemented from an external source. I ran an additional cable from the furnace for this purpose and the thermostat now operates an monitors temperature in my vacation house. I also have a "NEST" thermostat ($250 @ LOWES) as well which has more features and is able to run solely on the 2 existing thermostat wires in the wall.