Honeywell 5816—Tamper Error
A tamper error occurs when the panel is reading that the sensor’s cover is not attached properly. To address the tamper error on your Honeywell 5816 door/window sensor, follow the instructions below.
1. Press the end latch to remove the cover.
2. Take note of the tamper button, which must be pressed by the cover to resolve the error. Return the cover to the sensor, starting with the side opposite the latch, pressing closed until the latch snaps into place.