We have a 2018 Vengeance. Occasionally the water will not run in the toilet when activating the foot pedal. We have discovered that we can get the water to start again after letting water run in the bathroom sink for a few seconds. Don't know if there is something plugging the water line or if an air leak is causing it. This is frustrating, however, the temporary fix is relatively easy. The problem is occurring more frequently and we believe our temporary fix will eventually fail to work. What is causing this and how can we repair it.
If you have water pressure elsewhere but not at the toilet flush, then you probably have something in the water line leading up to the toilet connection. Release all pressure from the water lines then open it up and see what you can find. Good luck.