There is a dripping noise coming from the vent in the ceiling, but no drip has been detected. It comes and goes. We are still using air conditioning in Louisiana. Could it be the result of cycling with the ac unit?
Ceiling – What could be causing a dripping noise in the ceiling
ceilingnoise
Best Answer
It could also be water entering the condensation drain line. In many systems there's an air gap at this point, and if this is at the main trunk line, the sound can be transmitted all along the trunk.
I had this exact same thing happen.. I ended up tying a string around the outlet into the drain so that water had a path to the drain that didn't involve a super-loud PLOP! :)