Originally Posted by Ron6519
If none of these is a CO detector, just disconnect one at a time until you find the offending one.
How old are these detectors? Dates on the back. If 10 years, replace them.
Some of them are more than 10yrs old, and I am preparing to order new ones, however I have this question that maybe you, or someone else here can answer:
The system has the old (discontinued) Firex PAD type (model 120-890) units, so I have been replacing them with Kidde PE 120, which is (according to all that I have read online) the only model that can be interconnected with the old Firex ones.
If I replace all of the old Firex units, am I still restricted to the Kidde PE 120, or can I then use other Kidde models, such as the dual sensor PI 2010?
If so, that would make the most sense, since I think I would rather have the dual sensor protection.
While removing each detector to clean and inspect it, I found one that had a stuck reset button, so I left that one out until I get a new one.
Thanks for your help