"LF" in the washer display indicates the unit is not sensing a full water fill. If this occurs:
Verify both water lines are connected and the supply valves are turned on.
Verify the water inlet filters are clear.
Verify that flood safe hoses are NOT being used. Flood safe hoses unfortunately restrict the water flow causing the unit to assume the water supply has been turned off.
Verify the both fill hoses are not kinked or crimped.
If you continue to have problems, please contact Haier Appliances at 1-877-337-3639 or visit https://www.haierappliances.com/support/schedule-service to arrange service.