Posts on here refered me to an air hose near the control board. Check for it being crimped, you can blow through it and make sure you hear air coming into the drum. This can be your issue not your board, people have bought boards and still had this problem. So check the hose first. F1 is referring to pressure not being right on the water from air flowing against a sensor via this tube.
obstruction in air hose near control panel, can be crimped. the air line gets obstructed and causes a error code for pressure in water inlet, if this line is crimped it causes this code to be thrown. if this line is not crimped, look forward to a new board. just got a maytag bravos commerical washer off the side of the road bc of the line being crimped the owner threw it out. a $1,000 washing machine …. for a crimped hose….