Here is the parts breakdown
Replacement parts for FRG GLTF2940ES2 | AppliancePartsPros.com

Here is a tech sheet
ftp://ftp.electrolux-na.com/Pr..._PDF/Webster/1345417.pdf
Shows proper fill level.

Strange that an error code does not come up.
Sounds like the unit is not getting not the amount of water in needs in a specified time and is timing out.
Though I would have thought this would give an error code.

Since it is easy to check I would do the water supply.
Undo the hose at the tap and run into a pail to see if you have good flow. Many new homes hose burst protection and these can mess up and shut off the water.

Check the hose end, some hoses have a screen filter built into the sealing washer.

Reconnect the hose, undo it from the machine and run into a pail. Just in case you have a collapsed hose.

Check the screen filter built into the input side of the machine's inlet valve.
If dirty clean it. Do not remove it as it is there to keep crud out of the valve, which would hold it open and cause a flood.

Check the wiring harness between the two boards.
Especially the crimping of the pins also look for any indication of corrosion, often a gray or brown coating.
Check it for continuity using a meter on the most sensitive setting.