Figured it out. The tip of the water valve broke so it wasn't engaging and the broken piece wasn't allowing the pedal to work smoothly. Next step will be finding out if I can get upgraded from that model to a newer one. I've heard there is a silent recall on the Dometic 300 but can't find any solid details on it other than people have contacted Dometic and gotten a replacement model.
Get the serial number off the toilet and call Dometic. This series of toilet is subject to a free replacement due to a faulty seal between the bowl and base that will create a stink you can't get rid of. You may get a free toilet.