takitezsdc Posted June 11, 2007 Share Posted June 11, 2007 I have two thermostats, that are hardwired for power. My question is.........how come the unit still uses the battery and why do they only last 2 -3 months at most? I have the backlight turned off so I dont see how it can be draining much power. AND it really sucks when the battery goes out at 11:00PM at night and it gets 87 degrees in my home!! I find my self going out to Wallmart (at 11:30pm ) to buy a new battery? lol Help?Thanks Link to comment Share on other sites More sharing options...
slemay Posted June 12, 2007 Share Posted June 12, 2007 Make sure the switch, inside the thermostat, is set correctly! If they are correctly hardwired - the battery is ONLY used when power is lost - you can test that your unit is correctly wired by REMOVING the battery all together - it should still work. If it doesn't - then either the switch isn't set correctly or it isn't wired correctly. Link to comment Share on other sites More sharing options...
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