INSTALL TWO AA ALKALINE
BATTERIES AS SHOWN
AM 
TU
LEAVE
Fan Auto On | System Cool Off Heat | |||||||
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FAN SWITCH
SYSTEM
SWITCH
M5782
If the batteries are not replaced sometime during the flashing bAt Lo, the indicator eventually stops flashing. bAt Lo stays on without flashing, indicating the thermostat and heating/cooling system stopped working and the batteries are almost completely dead.
After the batteries are completely dead, the bAt Lo indicator disappears, leaving a com- pletely blank display.
To remove, press down on left ends of batteries. If the new batteries are installed within 20 to 30 seconds of removing the old ones, the thermostat does not have to be reprogrammed. If the display is blank, the batteries are dead or incorrectly installed, the thermostat has to be reprogrammed. See Programming Your Thermostat section for instructions.
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