You haven't said why you are convinced it's half open? so what everyone is therefore saying is we can't remember the angle it sits in the relaxed position so look up the port or feel up there and check if it's fully down. But looking at those other photos does suggest yours is stuck! Best to be 100% certain. If it is stuck take the actuating arm off and check the PV rotates freely if that's ok it must be the centrifugal end. Apparently sometimes balls get jammed.
|