Hello all. I have a Ryobi 2700 pressure washer that is only a couple of years old. Used it the summer before last and it worked fine. Now, it starts fine but there is no water from the wand? It is building pressure inside because after running it none of the hose fittings can be unscrewed. After a few minutes with the engine off, if I pull the wand trigger, the hose lurches a little bit as if a small amount of pressure is being released. Prior to running I removed and cleaned the pressure / Unloader valve. All appeared fine. Not sure what's going on. Any ideas?