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CHANGE BATTERIES
The CHANGE BATTERIES warning indicates two stages of battery power shortage.
When the batteries are weak, the CHANGE BATTERIES warning flashes until three
new AA alkaline batteries are installed. If the batteries become too weak for normal
operation, the thermostat enters the second battery power shortage mode.
When no battery power is left, the BATTERIES USED UP warning flashes on the
display and the system turns off. The system remains off until new batteries are
installed. The thermostat resumes normal operation after new batteries are installed.
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