Heat Sensor

1
one

Twist the cover counter clockwise and remove it.

2
two

Locate the battery.

3
three

Gently remove the battery from its connections.

4
four

Note the battery terminals (+, -).

5
five

Place a new battery in the device (CR123A).

6
six

Place the cover back on the base.

7
seven

Twist clockwise until you hear a click.