I have a Whirlpool front loader and it gives me a F09/E01 error. I looked online and it says to check your drain filter. I did that and it wasn't clogged. I did take off the drain line off and checked to see if it was clogged. It had some build up in the hose and was able to get that out. Hooked it all up and did a normal wash and it ran great. I did read the manual and made sure that the drain line wasn't pass the 4 1/2 inches down the drain. Month later, its giving me the same code again and the Sud code too. Checked the filter again and it wasn't clogged, same for the drain line. Please help.