Qolsys Freeze Sensor—Battery Replacement

Find your freeze sensor below to view instructions on how to complete your battery replacement. Due to the versatility of your panel, only commonly paired sensors are shown. If your specific sensor is unlisted, you can search for other sensors here. If you need further assistance, you can text a Support Representative any time at 469.513.8685.

Once you've replaced the batteries, the error on your panel should clear within one hour. If you would like to clear the error manually, click here.

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.