I'm having the same problem...any ideas?

I solved my problem by replacing my alarms; they were over ten years old and were prone to chirp whenever the room temperature where they were located dropped below 50 degrees or whenever there was a power outage.

If your FireX smoke alarms are over 10 years old, it's time to replace them. The alarms are warranted for five years and each alarm has a date of manufacture on the back.

Compatible FireX model numbers are 406, 428, and 41216.

What are compatible Kidde detectors. Firex was bot out by Kidde and Firex no longer exists.

I heard firex g-6 was bought out. What is compatible to replace it?

What kidder smone alarm replaces firex g6 with out changing wiring harness. Is there and adapter to for hard wiring.