Fisher & Paykel Dishwasher U1 — What It Means & How to Fix It
U1 is the DishDrawer fill fault — not enough water arrived in the allowed time. Most times it's the tap, a kinked hose, or a spray arm you can fix yourself.
What this code means
U1 means the DishDrawer started to fill but the right amount of water didn't arrive within the allocated time. The manual's first checks are all user-side: make sure the water supply is on, confirm the spray arm is seated and can rotate, and if the drawer is already full of water, empty it manually before retrying. If the checks are fine and U1 persists, it's usually the inlet valve — a service job.
Documented as 'U1 Fill Fault' in the DS605/DD605 DishDrawer user guide, whose steps are: turn the water supply on, ensure the spray arm is on and rotates about the centre, empty the drawer of water manually if needed, then call service if it still fails.
Most likely causes
| Cause | How likely | DIY-fixable? |
|---|---|---|
| Water supply or tap turned off or partly closed | Very common | Yes — no tools |
| Spray arm loose, off its mount, or blocked | Common | Yes — 10 minutes |
| Kinked inlet hose or clogged inlet screen | Common | Yes — check hose |
| Faulty inlet valve | Occasional | No — technician job |
What you can try yourself
- Check the tap or isolation valve feeding the DishDrawer is fully open.
- Open the drawer and confirm the spray arm is firmly seated and spins freely by hand.
- Straighten the inlet hose and clear any kinks behind or under the cabinet.
- If the drawer is full of water, bail or sponge it out before running the next cycle.
- If U1 still appears, the inlet valve likely needs replacing — note the code and book service.
When to call a technician
- Water supply fully on and the spray arm fine, but U1 returns on every fill.
- The drawer holds water and won't drain after a fill attempt.
Typical professional repair cost: Free if it's the tap or spray arm; an inlet-valve service call typically runs $150–$250.
Frequently asked questions
What does U1 mean on a DishDrawer?
It's the fill fault — the drawer didn't receive enough water within the allowed time. Fisher & Paykel's first checks are the tap, the spray arm, and manually emptying the drawer if it's full.
Why does my U1 go away after I open and close the drawer?
That's the spray-arm clue — a spray arm that's slightly off its mount can block the fill detection. Re-seat it so it turns freely and the fault usually stays cleared.
U1 after I've checked everything — what's next?
The inlet valve is the last likely cause. There's no safe DIY step inside the water path beyond the checks above, so a service visit to replace the valve is the honest next move.
Sources checked
Error meanings can vary by model. This guide was checked against the documentation above; use the manual for the model number on your own appliance when it differs.
Related Fisher & Paykel codes
- Fisher & Paykel Dishwasher F1 F1 on a DishDrawer is the flood-switch code — the machine has detected water where it shouldn't be, and it will keep beeping until it's dealt with.
- Fisher & Paykel Dishwasher F3 F3 on a DishDrawer flags a temperature-sensor fault — and a very hot incoming water supply is the one cause you can check and fix yourself.
- Fisher & Paykel Dishwasher F4 F4 on a DishDrawer points to the heating side — the water isn't reaching temperature. Beyond one reset, the element or sensor needs a technician.
- Fisher & Paykel Dishwasher U2 U2 is the DishDrawer 'something's sticking up' alert — an item is taller than the drawer allows. Remove it and press the button to continue.
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