I've had it replaced twice! I've replaced the tubes, valves and diaphragms. Both of the replacements gave me the same exact issue! After a few days of use it loses suction and the diaphragm gets stuck in the vacuum position and won't inflate back up. I pop the top off and back on for a second of suction, and it gets stuck again. Ugh! I know it is affecting my supply and I'm at my wits end.
I'm gonna call ameda again this morning, they're gonna want to replace it again, but I kinda just want my money back and buy a medela instead. Or rent a hospital grade pump for the next 4 months (that will be 12 months).