Water on wash cycle is good but rinse cycle is low water level

Your wash machine doesn't know that the tub is full. Open up your console and look for a vinyl tube attached to your water level switch. Take the tube off of the switch and blow into the tube to clear out any blockages. Then, put the tube back on and test the wash machine. If the problem persists, then you need to replace your water level pressure switch AND the vinyl tube (just in case it has a small hole in it somewhere along the way).

You can buy the switch, which comes with the tube, here:

Switch W10337780

Good luck!

It can be due to a faulty water level sensor which evidently is a pressure switch. If the diaphragm is damaged it will require a larger water level to achieve the said pressure to shut the inlet valve in all the cycles.

Check to be sure the drain hose is above the tub level.

You will need to replace the water level switch. Here is a link to the kit.
Here is a video to show you how to replace it.

Possible that the water level sensor has failed and so it does not load to the level set by the program. You will need to check the level sensor to clear the water line of air block or dirt or faulty unit.Try to set a higher water level to the program settings and see if the water fills up on rinse, choose an different program

Low water pressure or bad inlet valve, or clogged screens in fill hoses, check flow with hoses disconected these will be the causes! check hot and cold fills than check warm, any differnt all setting work?

The typical cycle is;
fills to selected water level
agitates wash cycle
drains wash water
spins wash cycle
fills to selected water level on rinse cycle
agitates on rinse cycle
drains rinse water
spins final time
end of cycle

this machine has a water level switch for the wash cycle and a switch for the rinse ccycle. remove control panel and take a small screwdriver and rotate the lever on the rinse cycle switch 1 click. (the rinse cycle switch is the one that does not have the knob on it. Unplug the machine before this is done. You will now have a full tub of water for the rinse cycle.

You need to check the pressure switch which is also called the water level switch. There is a small tube attached to it and it may have a blockage or a hole in it. You can find this behind the control panel to the left of the timer.

That is because the water level switch get stuck when water level reaches that particular point.

The water level switch is activated either by a floater sensor or by a membrane sensor that detects water pressure/volume, depending on the model.
On washing machines it is usually a membrane switch, and that is faulty on your machine.