Need complete model #. But LF is usually long fill. Meaning perhaps the screen in the machine valve or at one of the hose ends is clogged. Turn off your house valves behind the washer and disconnect the cold hose from the machine. It's usually the cold unless you've had a new water heater installed recently.

Quick test is to start the machine on any cold fill cycle, if it isn't filling or is very slow that's the cause.

Use a mirror or get behind it to see if sediment or other gunk is blocking the screen in the valve where the hose would screw on.. If possible don't remove the screen and be gentle cleaning this as you DO NOT want to damage the screen or allow anything to get through that screen where it could jam the actual valve.
If that's clear put the free end of the hose into a bucket or the basket of the machine and turn house valve back on. If nothing comes out then maybe there's a clogged screen in wall end of hose.

This is an old post... I'd guess my answer already fixed it. Maybe your post will prompt an answer from OP.