The Fisher Peykel dual drawer dishwasher : the top unit LED is off and the setting for length of wash is not lit up and is not functioning. There is power to unit because when I hit the lock button it beeps. Also the red light for the glass cleaning liquid compartment is lit. What seems to be the solution? I am an ME and hands on type, please advise.

As the drawers share a common outlet to the kitchen sink drain, it is the drain water from bottom drawer going to top drawer. Can happen if the drain hoses are not following the correct specifications for installation. An air gap kit is available to solve the problems.

Refer
http://www.genuineapplianceparts.net/product/WT50/WT50-Dual-Air-Gap-Kit/?preadd=action&key=WT50

Describethe inside of unit,any wear on it anywhere, the rack the dishes go on is it plastic coated? is it wore with rust comeing though on tips here and there?

First have the unit turned off. Then open up the drawer that,s giving you trouble.
The badge ought to be lit.
Now simultaneously press the static touch pads on each end of the led status lites (the ones on the drawer top?) (Cycle Select, and Eco-sensor pads)
Hold them for about 5 seconds.Now If you have a metal front machine, the badge display will either show HP or LP. Assuming you have normal water pressure about 50 - 70 psi you want to select the HP setting.
Do that by pressing the start button till you get what you want, then press power off to lock the setting in.

Fisher and Paykel design a air gap kit to prevent the water back flowing to the other while one is running. it really works and worth of your money. You need to change the lid seal and a pair of actuators from the top drawer. Because of the leak then the floor switch activated not allowing a complete cycle. Need to dry out the wetness from the bottom housing of both top and lower drawers by pulling the tubes out and accessing from the left side with small tower until it completely dry. Here is a link to buy air gap kit http://www.fisherpaykelparts.net/product/WT50/WT50-Dual-Air-Gap-Kit/

You need a Air gap kit designed by Fisher and Paykel to address this problem. It is pricey but it is worthy. I used this and very happy with it since no back flow problem from one while other running. Here is a link to order it.http://www.fisherpaykelparts.net/product/WT50/WT50-Dual-Air-Gap-Kit/

Press and hold the key or lock button for 5 sec or till you here a beep to unlock. Or till the light goes out above the lock button. You can get your manual here just find your dishwasher.

http://www.fisherpaykel.com/dishwashing/

Good luck and please rate

Have you tried pulling out the motor rotor and checking for anything stuck under it? try swapping it with the other drawer. If it still won't go you need to swap over the motor controllers between the two drawers if the fault moves you need a new Motor controller module. Cheers

can you pull the drawer up and out to take a look at both?let me know-mike

I have a fisher paykel dd603 dishwasher. If I select the normal wash setting on the top drawer, it posts the time in the lcd screen as 56 mins. The unit will wash as usual until it reaches the 28 min mark. At this point it will stay on 28 mins and continue to run, but it won't rinse or empty the drawer of water. Also it never counts down below the 28 min mark. It has flashed a F4 and F1 code. I've cleared them both, and checked to make sure that no water is standing on the bottom of the unit, and that the heating element is working. I should mention that the top drawer did overflow about two weeks ago, and that I did clean up the water. I don't know where to look from here. Any suggestions?