Persistent F1 code problems in a DD603 Fisher and Paykel. OK, so I've found and repaired the two leaks. Even replaced both rotors as they were worn out badly. Everything had been well and truly dried out and F1 was still a problem flashing on both draws. So I replaced the electronic mains filter board situated at base of dishwasher (the unit at bottom left with the water sensor attached) with a new unit thinking that would solve it. But it hasn't! The dishwasher remains completely dry. I've tried to power off and on at the mains switch and on the draws power buttons with no luck. Water inlet tap is turned on. Each time I power up the machine, the top draw displays the F1 code flashing and beeping and the the top draw rotor starts to spin. Approximately 20 sec later the lower draws does exactly the same thing. The two draws continue to flash the fault and the rotors continue to spin indefinitely. Nothing else happens (no water pumps into or out of dishwasher etc.). The dishwasher is NOT leaking and the water sensor is NOT wet. Any suggestions would be appreciated. We are in an isolated community and getting an authorised service repair would be extremely difficult for us.

SOURCE: Fisher Paykel DD603 Problem. Top drawer shows F1

Yup, definately the bottom drawer controller, for some reason you can run a DD603 with no board in the top, so long as you have a board in the bottom, but not the other way around. This is the fault you get, constant F1 from the top drawer. If you are stuck try removing the display cable from the bottom controller, this may help, so long as you leave the chassis harness in.

SOURCE: DD603 F1 error on top

Hi
Error F1 on your fisher & paykel means an overfill condition. One of the most common causes for an overfill fault is that the dishwasher cannot pump out the dirty water due to a plugged drain hose. Check the drain hose if it is clogged. Now remove the bottom drawer from the unit to inspect the flood switch. Remove the wire harness cover on the underside of the drawer. With the bottom cover off, unclip the wire harness, fill hose, and drain hose. Then unclip the linkage at the back of the drawer and lift the drawer off the slider arms. Now' you'll be able to look at the flood switch. Note the positions of the wires on the flood switch and remove them. Then unclip the switch housing from the base panel. The switch housing contains one switch for each drawer. The switches are wired normally closed (NC) and each switch has three spade connections, so it's important to note where the wires went. Now clean the contacts and let it dry. Hope this helps... Please post back if you need more information.
Daniel