How to Fix Error 1 — water supply on Fisher & Paykel DD24DHTX9N

Error 1 — water supply

This step-by-step repair guide walks you through fixing error 1 — water supply on your Fisher & Paykel DD24DHTX9N. With the right tools and parts, most homeowners can complete this repair in 1–2 hours and avoid a costly service call.

Part of our Top 20 Dishwasher Models & Common Repair Issues Guide. Browse all dishwasher repair guides for related models and issues.

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Common Symptoms & Causes

The following symptoms indicate a water supply problem on your Fisher & Paykel DD24DHTX9N dishwasher drawer.

The drawer display shows “Error 1” at the start of or during a wash cycle
The dishwasher drawer fails to fill with water and the cycle does not progress
You hear the drain pump running but no water enters the drawer
The cycle stops shortly after starting and the drawer remains empty

This error is typically caused by a kinked or blocked water supply hose, a faulty or clogged inlet valve, low household water pressure, or a failed water inlet valve solenoid that has worn out over time.

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Safety First

Unplug the dishwasher from the power outlet before starting any repair — never work on a live appliance.
Shut off the water supply valve before disconnecting any water lines or hoses.
Wear work gloves when handling metal brackets, sheet metal edges, or sharp components.
Take photos with your phone before disconnecting any wiring harnesses or connectors.
Work in a well-lit area with enough floor space to lay removed panels flat.

Tools & Parts Needed

Essential Tools

Phillips #2 screwdriver
Torx T20 screwdriver
Needle-nose pliers
Multimeter
Flashlight

Replacement Parts

Step-by-Step Repair Instructions

Step 1

Disconnect power at the circuit breaker and turn off the water supply before starting any work. Locate the water supply valve under the sink and confirm it is fully open, then trace the inlet hose from the valve to the dishwasher and straighten any kinks — a kinked or closed-off hose is the most common cause of Error 1 because the machine cannot draw water fast enough to satisfy the fill sensor within its timeout window.

Step 2

If your DD24DHTX9N is fitted with an Aqua-Stop safety hose, inspect it for signs that the internal flood-protection valve has tripped — a tripped Aqua-Stop locks water flow completely and cannot be reset, only replaced. Look for a swollen or discolored hose body or a visible indicator window that has changed color; if the safety valve has activated, replace the entire Aqua-Stop hose assembly rather than attempting a repair.

Step 3

Remove the lower kick plate (two Phillips screws) to access the water inlet valve and test each solenoid coil with a multimeter set to Rx1 — a healthy coil reads 200–500Ω, while an open reading (OL) confirms a failed solenoid. Replace the inlet valve assembly if any coil reads open, because a dead solenoid will never allow water to enter regardless of supply pressure. Pro tip: verify you have at least 20 PSI of incoming water pressure before condemning the valve, as low household pressure can mimic a valve failure.

Step 4

While the inlet hose is disconnected from the valve, inspect the small mesh filter screens seated inside the hose fitting or valve port — sediment and debris accumulate here over time and restrict flow enough to trigger Error 1 even when pressure is adequate. Use needle-nose pliers to carefully extract the screens, rinse them under running water, and clear any remaining debris with a soft brush before reinstalling. Never run the dishwasher without the screens in place, as particles will damage the inlet valve solenoid.

Step 5

Reconnect the inlet hose, restore the water supply slowly and check for leaks at the connection before closing the kick plate. Restore power and run a Normal cycle while observing the machine — Error 1 will clear automatically once the control module detects a successful fill completed within the 30-second fill-detection window. If the error returns immediately, note whether the machine is drawing any water at all, as that distinction helps narrow the fault to supply pressure versus a failed valve or control board.

Step 6

If all water-supply components test good, Error 1 on Fisher and Paykel dishwashers can also be triggered by a float switch stuck in the raised position, which falsely signals an overfill condition and prevents the machine from initiating a new fill. Locate the float assembly in the tub floor, lift and release it manually to confirm it moves freely and springs back down — debris or a warped float can hold it up permanently. Clean around the float housing and verify the switch beneath it reads open on a multimeter when the float is down and closed when it is raised, replacing the switch if it fails either test.

Where to Buy Replacement Parts

Find genuine OEM and aftermarket replacement parts for your Fisher & Paykel DD24DHTX9N on Amazon:

When to Call a Professional

If the issue persists after completing all steps above, the problem may involve the sealed refrigerant system, a failed main control board, or wiring that requires specialized diagnostic equipment. Contact a licensed appliance technician — attempting sealed-system repairs without EPA 608 certification is illegal and unsafe.

How Much Does This Repair Cost?

DIY parts for fixing an Error 1 water supply issue on the Fisher & Paykel DD24DHTX9N typically cost between $10–$75, depending on whether you need a new inlet valve, hose, or filter. A professional service call usually runs $150–$300 once you factor in labor. Tackling this repair yourself can save you $100 or more.

Frequently Asked Questions

What does Error 1 mean on my Fisher & Paykel DD24DHTX9N?

Error 1 indicates the dishwasher is not receiving an adequate water supply. Check that the inlet valve is fully open and the water supply hose is not kinked or blocked.

Can I fix Error 1 myself without calling a technician?

Many Error 1 causes, such as a closed water valve or clogged inlet filter, are straightforward DIY fixes. However, if the water inlet valve itself is faulty, replacement may require a professional.

How do I reset my DD24DHTX9N after fixing the water supply issue?

Once the water supply problem is resolved, simply turn the dishwasher off, wait 30 seconds, and restart a new cycle to clear the error.

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