Here's one I haven't seen in the forum before.
About once or twice a week for the last month or two we have been awaken between midnight and 1AM with the propane detector chirping like a smoke detector with a low battery, however the propane detector is wired directly to the battery. It's not an alarm, just a chirp. I get up and push the reset and all is well for the rest of the night.
Today I hit it with a duster and hopefully that will end this, but...
My question is: Why is it always in the middle of the night? Why doesn't it chirp during the day? I have found that also to be true of smoke detectors with a low battery. It's always the middle of the night. Is this some kind of law of nature?