Originally Posted by laurie
Case has not been on its side. The res is at the highest point.
The sound is just that of air passing through the pump.
Its a ddc 18w with an xspc top.
Thanks for the help guys. I hope I can figure this out.
If that pump is an in line pump, and it is (or was) making noise, then the baffle inside could have a hole in it..
This can happen.. If the pump uses a rubber baffle inside and it has a hole in it, it can pull air in but not lose any water.. Rare, and the hole usually is very very small..
A good way to check it to put a little back pressure on the system.. Close or crimp the line before it goes into the pump.. Only for a few second to see if the extra pressure shows a leak.. Becareful, if you do this too long you could damage your pump..
If your tech. minded, take your pump apart as much as possible.. Usually you can get to the baffle with little effort.. Inspect the baffle and clean off any build up.. Remember, if there is a hole its really small.. You may have to look real hard and even stretch the baffle a little in order to find it..