Robertshaw RS8210 Operation Manual page 7

Caution:
When the battery icon
immediately to avoid damage to your HVAC system. Freezing or
overheating could occur
Battery Door Information
Press the lower portion of
the thermostat to open the
easy access battery door.
THERMOSTAT QUICK REFERENCE
appears, replace the alkaline AAA batteries
Install two
AAA Alkaline
batteries
into battery
compartment.
Be sure to
match positive (+) ends of batteries with positive (+)
battery terminals in the battery compartment.
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