Hmmmm. I love puzzles. You prolly know or have tried.
My first GUESS is water running off and flowing over roof etc. and takes a while..bla bla
2nd guess..something is storing the water to run out slowly.... reason for noise
Possible idea to narrow problem... raise/lower front of unit to allow to change direction of flow of water to see what sound is left.
2017 Puma 297RLSS
2005 Ram 2500 4X4 diesel SMOKER!!
I love puns, irony and tasteless jokes...
born in Texas.... live in Arkansas