Here’s How to Fix A washer that doesn’t fill with enough water
Water Inlet Valve
First remove both hoses completely and check the screens in both ends. Some hoses have screens in both ends, clean these thoroughly.
Then check the screens in the back of the water inlet valve and clean if necessary.
If all is clean make sure ample water is flowing out of the water dispenser area. If the water flow seems low the water inlet solenoids may not be opening the water inlet valve all the way. In that case you will need to replace the water inlet valve. The video will also show you how to check this.
The pressure switch controls the level of water in your washing machine. This does this by a small chamber on the side of the tub, this chamber fills with water which in turns creates pressure in the chamber.
There is a hose connected to this chamber that runs up to the switch. When the right amount of pressure is applied to the switch it stops the water flow.
If the hose becomes clogged up, gets punctured or cracks and leaks the hose will need to be cleaned or replaced.
If the hose looks good and has no holes check the pressure switch by checking it for continuity when blowing on the end of the hose.
This will close the switch and simulate pressure. If you have no continuity when the switch is closed replace the pressure switch, this video will walk you thru replacing and testing.