Thanks everyone!!! By process of elimination it was the CO detector in the bedroom. I remembered I had it replaced a couple of years ago-forgot it had batteries
. Three new AA's and we are good to go!
Since the propane detector in the kitchen is hardwired, does it have an "end-of-life" as well? Would you recommend go replace with a hard wired one or a battery operated one?
Thanks!
You guys are awesome!!!!