July 10, 20223 yr comment_27700 Hi, We have two BRK 670 MBX smoke alarms connected together in our hallway and landing; one up one down. We've been in the house for 8 months and the alarms were manufactured in 2016, so are 6 years through their 10 year life. I recently replaced the batteries and reset both alarms. But still, the downstairs alarms beeps 3 times every 25 minutes, followed quickly by one beep of the upstairs alarm. (Weather conditions are warmer than usual today, but it only started at 9pm.) Help appreciated, thank you Report
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