How does optical & PIR motion detector works? In depth explanation needed?
smothering. basically if a fire has no oxygen it goes out. you can dump sand or dirt on it, or pat it out with a towel or blanket if it's a very small fire. or, yanno, if it's a person who's on fire, do that whole stop, drop, and roll thing.
Try pushing the test button for 3 seconds after replacing the battery some detectors need to be reset after the battery has been replaced and this is how to do it if you do not reset it the beeping will continue as you say.
I am assuming the leaks have been fixed. If the area is dry prime with Kilz, up to four coats. the final coat may match the ceiling color, if not you need white ceiling paint, blend it into the old paint.
Fire needs three things to continue burning - fuel, oxygen and heat. Remove any of these and you put the fire out. For example - Cut off its oxygen (smother it in a blanket) Cut off its fuel (back burning)
