I have changed the battery in my sensor but as I was changing it, the inside panel slipped, it didn't land on the floor as I managed to catch it. However I am now getting tamper open, I cannot seem to get rid of this message and I don't know the installer code, has anyone got any ideas? Thanks
Im assuming cover not catching tamper switch, take cover off and check. Might've been a spacer on the cover to press switch when cover is fitted, that couldve fell off