Fisher & Paykel Dishwasher A1 Error Code: Water Supply Fault on a DishDrawer (Meaning, Causes, Fixes)

What the code means

Fisher & Paykel's US and Canada DishDrawer user guide 592816A lists A1 in its 'A' fault code table as "Water supply fault," and the NZ and AU care guide 433468A gives the same code as "Water supply fault (A1). Ensure water supply is on." A codes are problems the owner can usually sort out, unlike F codes, which point to a fault that may need a reset or a service visit. A DishDrawer fills through an inlet valve in the base until the wash pump is primed. Fisher & Paykel's DishDrawer service manual 590409A explains that in low water pressure situations the drawer may never reach prime and times out, and it gives the fill time-out as 175 seconds. That manual, written for older DD607 and DD247 models, shows the same water supply warning as U1 (a "no tap" symbol), so if your drawer shows U1 instead of A1, the advice on this page applies too. On a double DishDrawer only the drawer with the problem shows the code.

Likely causes

• The water supply tap to the dishwasher is turned off or only partly open.
• The inlet hose is kinked, squashed behind the cabinet or not connected securely.
• Water pressure too low for the drawer to fill and prime in time, for example when a washing machine or shower is running at the same time. Fisher & Paykel's minimum is 0.03 MPa (4.3 psi), or 0.1 MPa (14.5 psi) on water softener models.
• A blocked water softener filter on models that have one.
• Foam in the tub from the wrong detergent or spilled rinse aid, which stops the wash pump priming properly.
• A damaged motor rotor, a failed inlet valve or, less often, a faulty controller (service manual 590409A).

Safe DIY checks

1. Check that the water supply tap to the dishwasher is fully on.
2. Look under the sink or behind the kick panel for a kinked or squashed inlet hose, and make sure it's connected securely at both ends.
3. Press the power button once to stop the beeping, then press it again to clear the fault, as Fisher & Paykel's user guide says.
4. Press Start/Pause to resume the wash program and watch whether the drawer fills.
5. If A1 shows up when other appliances are using water, try running the DishDrawer when the washing machine, shower or irrigation isn't running. Fisher & Paykel's service manual says low pressure homes sometimes need to do this.
6. If you see foam in the drawer, use only dishwasher detergent made for automatic dishwashers and wipe up any spilled rinse aid before running a rinse.
7. If A1 keeps returning with the tap on and good pressure, note the code and contact Fisher & Paykel Customer Care or book a service technician.

Parts that commonly fix it

Always match the part number to your exact model.

Related codes

• A7 Fisher & Paykel Dishwasher A7
• E1 Fisher & Paykel Dishwasher E1
• E20 Fisher & Paykel Dishwasher E20
• E30 Fisher & Paykel Dishwasher E30
• E6 Fisher & Paykel Dishwasher E6

All Fisher & Paykel codes →

Sources

1. Fisher & Paykel DishDrawer user guide 592816A (US/CA, DD24DCT/DD24SCT models): 'A' fault codes table (A1 water supply fault, how to clear it and resume)
2. Fisher & Paykel DishDrawer care and maintenance guide 433468A (NZ/AU, DD60 models): fault codes (Water supply fault A1, ensure water supply is on)
3. Fisher & Paykel DishDrawer service manual 590409A (DD607, DD247): fill and prime (3.7), U1 water supply warning causes and 7.1.1 checks (pressure minimums, 4 litre valve, rotor, softener filter, foam), inlet valve resistance at P205