My dishwasher has the F (fill) error code when I try to run it; we get the perpetual fill/drain behavior mentioned elsewhere. I ran the test program, and got an error code 6. Of course, I had the ubiquitous burned board; I resoldered the contact on the board for the heater control. Now I get an error code 4.

I took apart the left panel. Both the float/flood switch (f1) and the diaphragm flow switch (e5) seem to work fine. I also made sure the float floats, the rod from the flood switch is not pushing up on the reed switch, and the diaphragm can push on the flow switch.

I had to blow quite hard to get the diaphragm switch to pop out - could this be my problem? Likewise, is it possible my float is not floating high enough? Or, even though I fixed the heater control bug on the control board, do I still need a new control board?

Thanks.