Qolsys Freeze Sensor Batteries

Find the image of your freeze sensor below to view instructions on how to complete your battery replacement.

Qolsys QS5515-840 IQ TEMP Temperature Sensor & Qolsys QS5535-840 IQ TEMP Encrypted Temperature Sensor:

Press top tab to remove the cover, then remove and replace 2 CR2032 Lithium batteries.

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