After replacing the inlet valve assembly on a lg top loader washing machine, the machine now fills up with water and does not stop. How can this be fixed?

it needs the inlet valves replaced

Water valve on washer bad

If the noise is only when this function of filling, and if you are only using one of the two fill valves, may be due to the magnets of the inlet valves of the water, which are activated in filling and are disabled when you start the program. that noise is normal unless it is very strong and is the preamble to the damage of the two valves.

water inlet valve is bad
and stuck in open position faulting
replace with new water valve.

If the water stops when you stop the cycle, then the pressure sensor is at fault. If you need to turn the water supply off to stop it, then the water inlet valve is at fault.

Assuming the water is coming in even when unit is unplugged from wall. You should to replace the water inlet valves where the hoses connect to the machine. You need to unplug the power and remove the top, disconnect the hoses unhook the wire harness plugs, unscrew the hose valve hex nut and remove valve. Install the new one in reverse order.

Water Inlet Valve Replacement Procedure
Cold water inlet valve assembly: Part # 5221ER1003A
Hot water inlet valve: Part # 5220FR2006H

1. Safety first. Unplug the machine.
2. Close the water supply valve.
3. Remove the cold water fill hose and drain the residual water into a pan or bucket.
4. Remove the two screws on the back of the top panel securing it to the cabinet.
5. Slide the top panel to the back of the machine and lift it off the cabinet.
6. Disconnect the wiring harness connectors from the valves. Mark the connectors to make sure you reconnect them to the right valve.
7. Unscrew the valve assembly from the cabinet and pull it out.
   
8. Loosen the hose clamps and remove the hoses from valve assembly.
9. Connect the hoses to the new valve assembly. Reinstall the valve assembly and the top panel in reverse of the steps above.
10. Reconnect the fill hose and open the water supply valve.
    

Hi. the pressure sensors in the water valve assembly appear to be damaged. you will need to replace the inlet water valve assembly in this case asap.

This is solenoid failuer. (basic water valve failure this case)

Just found this whilst looking for known issues with my machine as the cold water won't stop when filling.


http://safemanuals.com/user-guide-instructions-owner-manual/LG/WF-T753A-_E

You either have a defective pressure switch or water inlet valve. Start to fill the machine with warm water so that both solenoids on the water inlet valve (hot and cold) are activated. After about 30-60 seconds, push the timer knob in to stop water flow. If the water continues to flow, replace the water inlet valve. If this is the case, it may take a few times of starting and stopping water flow to allow solenoid to heat up and become symptomatic. If water flow stops abruptly each time knob is pushed in, you most likely have a defective pressure switch (water level switch).