My two CO detectors are showing malfunction on panel. I replaced batteries now it shows tampered with. How do I fix ?
Tamper is a status indicating that the sensor housing is not closed, on the CO detector it means it is not fully twisted on its base.
If the sensors are remounted on their base this status should resolve. If it does not resolve:
Remove the sensor from its mounting base and remove the battery. Double check the correct battery polarity. Wait a full 60 seconds before reinserting the battery. Then reattach the sensor to its mounting base.
Does the tamper resolve?