Remove the middle magnetic faceplate from the vent

Remove the battery pack by lightly pressing on the middle tab towards the battery packThe battery pack may begin to lift out after doing soBe careful not to press the reset button next to the serial number sticker

Fully remove the battery pack and remove the old batteries

Insert the new batteries, taking care to match up the polarity properly as labeled on one side

Reinsert the battery pack following the arrows on the side of pack

Press the battery pack in until the middle tab clicks into placeAgain, be careful not to press the reset button next to the serial number stickerIf the vent was previously installed, you should see the LED flash once only and no calibration will occurIf the vent was previously reset (intentionally or accidentally), the vent will calibrate (open and close quickly) and result in a flashing LED.

If you have accidentally reset your vent, you can follow these steps to reconnect (click here)

Return the magnetic faceplate to the device