I have a nighthawk carbon monoxide detector model kn-cop-dp date of mfg november 29,1999 it reads err with a beep every 30-40 seconds what should i do

February 2021 0 9 Report

I have a nighthawk carbon monoxide detector model kn-cop-dp date of mfg november 29,1999 it reads err with a beep every 30-40 seconds what should i do

Home Security - Kidde - Nighthawk Plug-in Carbon Monoxide And Gas Alarm