Jim Coleman RO won't stop making water, overflowing tank

[luckyducky]

I have a Jim Coleman stand alone RO system. It won't stop making water. The storage tank is overflowing and constantly discharging out reject line, but the float valve is working properly. Motors aren't running, so i assume a leak, but how do i find out where?

Is it the Furnas pressure switch maybe? I'm not sure how it all works, as I just bought the car wash 3 months ago. But original owner, had me push down the switch and it solved it for one day last month, but no luck anymore.

there's diaphram solenoid below that, but it charges up with screwdriver test when i make motor run.

 

[lag]

I dont know much about JC systems ,but if water is flowing through the system without the pump running ,a solenoid on the water line feeding the unit is stuck open.

 

[MEP001]

lag is right, all it can be is the solenoid, it either has debris in it or the diaphragm is torn.