[Notanlines]

I'm with porthole on this. It would seem that in replacing the two hoses one would be able to see where the fault was in the hose. Unless I'm mistaken, there could be only two things happen with a hose. Either air gets sucked into the system or fluid leaks out of the system. If shaking the control box causes it, then it also would seem that air would be allowed into the system rather than fluid leaking out.