Maytag Bravos 300 quiet series LF code

I have been getting the LF code on a couple of the cycles, seems to be related to warm or hot water, I have checked the hoses, the screen leading into the machine and there are no restrictions. leading into the valve. When you first turn the machine on I can hear the valve magnets buzzing for a while before it actually starts filling. Not sure if this is normal or not. I am not sure what to check at this point.