Question about Fisher DD603B / DD603W / DD603H Dishwasher

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Error U3 Starts and runs for about 5 mins, then it beeps and comes up red in the display with U3 written on it. do you know what this means?

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  • di Dec 14, 2008

    My apologies it is a DS601V2 model and thank you so much, the pressure seemed to be the problem as it is working fine now.


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That's a "Low Pressure" fault and it's possible you may only need to reset the mode. This question is posted under DD603 but a U3 code is usually associated with the 602 models. I am including an instruction for you on how to check the setting. Start with that first, it is easy to do.
Let me know if you are not able to read the text.Error U3 - ee2ba21.jpg

Posted on Dec 14, 2008

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U3 will display because the water did not drain from the previous stage in the cycle... Check the HP/LP settings first as this will give the impression the water did not drain if incorrectly set. Otherwise the pump may be damaged, blocked or the waste hose blocked.

Posted on Dec 14, 2008

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Red light U3


The U3 error code could mean a few things. Not sure if you get it in both or just one drawer.

It could mean there is something blocking the drain pump. Lift the filter plate and drain filter. Then remove the rotor by disengaging the collar holding the impeller and rotor assembly. clean the area including the channel between the rotor cavity and the drain sump. Put everything back and test.

If this does not get rid of the U3 then it is possible there is a kink in the drain hose. Pull the drawers out and check behind. If nothing visible then other possibility is the inlet water pressure setting is not correct. If you know how to read the water pressure setting from the display then compare the setting on the two drawers.

Please post a comment to let me know what you find.

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My ADP 8342 continually sounds 10 beeps, stops the...


Refer the user guide for the error message meaning. Contact service provider.

Before that make sure that the water supply to the inlet is having free flow.

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1 Answer

Our F&P DD601V2 double dishdraw is showing error 'U3' and the water does not totally drain out after a cycle, any ideas? Thanks


This applies to all DD601 and DD603 dishdrawers.
U3 is either one of the following:
- Drain pump is blocked.
- Drain hose is blocked.
- Sprayarm or rotor not turning freely.
- Motor electronics have failed.
- Machine set to 'LP' on a high pressure water supply.

Often it's just the last one, "Machine set to 'LP' on a high pressure water supply.", as this can be unintentionally changed by a user from an uncommon course of events. Sometimes, due to the technical design of the way the buttons work, if water bridges the 2 "Programme" and "Eco" buttons (inside on the top right of the tub), pressing either one, or both, (or just having your finger in the water) for longer than 5 seconds brings up a special mode that a user, in their ignorant attempts to get out of it, can erroneously change the pressure setting, subsequently causing a U3 error. It happened to me once when I was cleaning the machine, wiping around the Programme buttons.

To change to the proper High or Low Pressure settings:
1) LCD Display on. Hold the Programme and Eco touch switches simultaneously for 5 seconds.
2) Machine beeps and "HP" or "LP" is displayed in the LCD.
3) Push the Start/Pause button to toggle between them.
4) Push the Power button when correct selection complete.

Apr 07, 2010 | Fisher and Paykel 24 in. DD603H W Built-in...

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My LG dishwasher stops running 5 mins in


The LE code means there is a problem with the washer motor. ( Motor error ) Condition : The motor is working abnormally. Possible cause : Wiring connections. The impeller of washing pump is locked. The rotor of washing motor is locked. The blade is locked.

Remedy: Correct wiring connections. Replace the cause of restriction. Replace the washing motor. Replace the PCB.

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Fisher & Paykel DS605 starts cycle, stops, beeps, shows U3 error.


U3 means the tub filled to quickly or the water failed to drain. Do you have very high water pressure? are you using the wrong detergent? eg you can't use tablets (powerballs) etc in the unit. Try putting half a cup of white vinegar in the tub to kill any foam. Check there isn't anything stuck under the motor rotor inside the tub and the there's no signs of damage. Put the drain hose in a bucket and see if the water drains ok when the unit starts? If everything seems ok I'd suspect the main motor controller module but it may be worth getting an appliance tech to inspect unit first as it's hard without seeing this unit. feel free to ask any questions. Cheers

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1 Answer

Beeping and red light stating U3


Hi and welcome.
You posted your question in the DD/DS603 series section, but code U3 is usually seen on a DD/DS601 or DD602 series. When this code appears, most comon cause is that the machine is set in LP or LOW PRESSURE mode and needs to be set to HP or HIGH PRESSURE.
The fault is sensing water level too high in the drawer, which can also be caused by a blocked drain or inoperative pump. I can tell you exactly how to tell if the machine in in the wrong mode if you can tell us the correct model number. The machine's pump/drain system can easily be checked by putting the machine in diagnostic mode and running the drain pump.

Feb 03, 2009 | Fisher and Paykel 23 in. DD603H SS...

2 Answers

FISHER PAYKEL DISH DRAWER U3 FAULT CODE


LP is a setting for Low pressure. To reset your pressure to HP, hold the Programme and Eco touch switches simultaneously for 5 seconds. Once the setup mode is entered a beep is emitted and
the LCD is red with ‘HP’ or 'LP' displayed. Push the Start/Pause button to alternate between HP and LP. and push the power button to exit.

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1 Answer

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