If my machine was one of the newer ones which displays the "E" error codes, diagnosis would have been much easer. My machine is one of the GHW models and only displayed the "F" code. It began intermittently and eventually progressed to stopping every minute and displaying the fH code. I cleaned all the drain pump lines and filter and verified drain was good. I also checked the inlet valves and supply lines and checked all the electronic connections. Because I was getting good water flow into the machine, I focused on the pressure switch. The hose was clear and had no leaks. When I checked the resistance across connections on the switch itself, it pointed toward a bad switch, which I replaced. Still had the problem. Running the diagnostic test did not narrow it down, and I began to fear the control module. As I continued running the diagnostics, I started focusing more on each step of the diagnostics. The code would only appear during the second and fourth steps, the cold water and hot water fill stages. Since I knew I was getting good water flow into the machine, I decided to try the flow meter. After ordering the part from you and installing it, I have had no more trouble. Problem solved. One of the main reasons I did not suspect the flow meter originally was that I had read in a couple of posts by technicians that the flow meter rarely fails. In this case, it did. As I stated earlier, running the diagnostics on one of the newer machines would have narrowed it down to the flow meter.