Code u1 fisher& paykel model 920 - Fisher and Paykel Dishwashers

See Service Manual for help
Fisher & Paykel DW820 Parts list - download free (nodevice.com)

http://www.fisherpaykel.com/vault/pdfs//pdf_usecares/590199D%20DishDrawerP7%20userguide%20USCANZAUGBIE.pdf

U1 is a water supply error , it explains it all in this manual Cheers

U1 is displayed on the LCD as a "no tap" symbol. (time out on fill is after 175 seconds)

Possible causes:
• Water turned off
• Insufficient water supply pressure
• Blocked water softener filter (if fitted)
• Spilt rinse aid causing over foam in tub
• Incorrect detergent being used
• Motor rotor
• The machine is siphoning
• Inlet valve has failed
• Controller

Hi there Ypowers, U1 fault code relates to the fill system. Is the tap turned on, is the spray arm position correctly and free to rotate, nothing blocking it?. I hope this helps regards Gary.

Hi
Error code U1 means that the dishwasher might be taking longer time then required to fill the water and water is not draining properly as something might be blocking the drain pump assembly due to which the water is leaking. To solve this issue you'll have to take the front lower access panel out and then clean the drain pump assembly completely, also clean the impeller and chopper assembly located at the bottom of the unit. Also check the water supply and spray arm. After this is done the issue should be resolved, if not then check the float switch mechanism and make sure that it is fine. 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

The U1 code means:-
Dishwasher attempted to fill to correct level but failed. = Water tap not turned on. Turn the water tap on.
Too much foam. Rinse aid setting too high or has been spilled. = Turn the rinse aid dial to a
lower setting or wipe the spill. Incorrect detergent. Ensure that you use a detergent that is intended for a domestic automatic dishwasher. Egg yolk. Place an extra tablespoon of detergent in the dishwasher door for pre-rinsing.
Too much detergent. Use the recommended quantity of detergent
Wash pump faulty. Call your Fisher & Paykel Dealer or Authorised Service Centre.
Dishwasher not draining. = Drain hose bent or kinked. Straighten drain hose so water can flow through. Strainer blocked. Empty out the strainer and ensure the filter plate is clear of food
particles..

Hi,

"U1 error code" means the unit has failed to prime with water within 3 minutes. Its taking longer than expected to fill with water. Check the fill valve,it might be due to water supply problem, or the spray arm might not be in the exact position place.Check the above to fix this error code.

Thank you !!

Have you checked whether you are getting the water supply to the dishwasher. Check if there is no kink in the water hose.

If no problem with water supply then check the water pressure rating is OK for the dishwasher.

U1 means the unit has failed to prime with water within 3-4 minutes.
Its taking longer than expected to fill with water.
Check the fill valve, water supply problem, excessive sudzing.,reduce your detergent.

Can you provide model and serial number?