Shut power to machine before performing any repairs
First you will want to check the screens in the hoses that lead to the washer.

Move hoses over a sink and turn on water supply to see if pressure is normal. Shut off water supply valve. Remove the hose from the supply valve. Look inside each end you will see a screen in one or both ends. These screens can collect sediment in your water. Rinse the screen to remove the sediment. Now if they were not clogged up look at the screens inside the end of the water inlet valve.

These can be carefully remove with pliers. Rinse these screens. To check the water inlet valve, you will need to get access to it. This procedure varies by manufacturer. From removing the top of the machine to removing the back panel.
Once you have access to the water inlet valve you will notice 2 coils with wires plugged into them.

Remove the connectors. Connect a multimeter to one coil at a time. Set your multimeter to ohms at the 1x scale. You should have a reading usually between 500-1500 ohms. If you have no reading at all you will need to replace the water inlet valve assembly. This is easy to do now that you have accessed the valve. It is usually held in by 2 screws. Remove these screws.

There will be a one or two hoses connected to the water inlet valve secured by a clamp. Remove these clamps and twist and remove the hoses. Next connect the hoses the the new valve and tighten the clamps. Place water inlet valve into position aligning the screw holes. Put in 2 screws and tighten. Put access back together. Connect 2 hoses to washer. Turn on water supply and check for leaks. Plug washer into outlet. Try washer. This repair and troubleshooting for a faulty water inlet valve. If you have slow or no water entering your washing machine,washer over fills, washer underfills, washer times out , this may be the repair guide you need. Many times, the washer will show an error code or fault code showing slow or no water entering the machine. Fault codes can appear as fh, f1, f2, f3, f4, f5, f6, f7, f8, f9. It would be similar for the following manufactures and many others. Admiral, Amana, Asko, Bosch, Caloric, Dacor, Estate, Frigidaire, Fisher Paykel, Gemini, General Electric, Gibson, Hamilton, HotPoint, Jenn Air, Kelvinator, Kenmore, Kitchen Aid, LG, Magic Chef, Maytag, Miele, RCA, Roper, Samsung, Sears, Tappan, Thermador, White-Westinghouse, Whirlpool