How to Fix Error 23 on Cove DW2450

Error 23

This step-by-step repair guide walks you through fixing error 23 on your Cove DW2450. 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

These symptoms typically appear when your Cove DW2450 is triggering Error 23.

The dishwasher display shows “Error 23” and the cycle stops mid-wash
The door latch fails to engage or releases unexpectedly during operation
The dishwasher beeps repeatedly and refuses to start a new cycle
The control panel becomes unresponsive after the error code appears

Error 23 is most commonly caused by a faulty door latch assembly, a worn door latch switch, or a damaged wiring harness connecting the latch mechanism to the control board.

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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 to the dishwasher for at least 10 minutes, then restore it. Cove units can throw transient fault codes caused by momentary voltage spikes or control board glitches, and a full power cycle clears the capacitors and resets the controller. If Error 23 does not return after power is restored, no further action is needed.

Step 2

If Error 23 reappears after the power cycle, the fault code points specifically to circulation pump failure in Cove’s fault code table, meaning the pump is not moving water at the expected flow rate or pressure. This is a confirmed hardware issue, not a software glitch, so further diagnosis of the pump assembly is required. Do not continue running the dishwasher, as operating without proper circulation can damage the wash motor and heating element.

Step 3

Remove the lower rack and unscrew the filter assembly to access the sump at the bottom of the tub. Reach in and manually spin the pump impeller — you are checking whether it rotates freely, because a seized impeller indicates bearing failure inside the pump motor, while debris lodged against the impeller can mimic the same fault code. Clear any food debris or broken glass carefully (wear gloves), then reassemble and run a test cycle before proceeding to electrical testing.

Step 4

With power disconnected, locate the pump motor harness connector and set your multimeter to the Rx1 (resistance times 1) scale. Probe both motor windings at the connector pins — each winding must show measurable resistance, because a reading of infinite resistance (open circuit) confirms a burned or broken winding inside the motor, which cannot be repaired and requires full motor replacement. A reading of zero ohms (short to ground) is equally a failure condition and also means the motor must be replaced.

Step 5

Cove dishwashers use proprietary components that are not sold through standard appliance parts distributors, so repair should be performed by a Sub-Zero Wolf authorized service provider. Contact the authorized service locator at 1-800-222-7820 to find a qualified technician in your area. Attempting repairs with non-OEM parts can void your warranty and may result in parts that are incompatible with Cove’s control system.

Step 6

Before scheduling service, register your appliance at subzerowolf.com if you have not already done so, because an active registration is required to access Cove’s warranty coverage. Cove offers an industry-leading warranty that may cover the circulation pump failure at no cost depending on the age of the unit. Have your model and serial number ready — both are printed on the door jamb label inside the dishwasher door.

Where to Buy Replacement Parts

Find genuine OEM and aftermarket replacement parts for your Cove DW2450 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.

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How Much Does This Repair Cost?

DIY repair parts for Error 23 on the Cove DW2450 typically cost between $20–$80, depending on the faulty component. A professional service call usually runs $150–$300 once you factor in labor and fees. Tackling this repair yourself can save you $100 or more.

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Frequently Asked Questions

What does Error 23 mean on the Cove DW2450?

Error 23 on the Cove DW2450 indicates a drainage issue, typically caused by a clogged filter, blocked drain hose, or a faulty drain pump. Clearing the obstruction or replacing the pump usually resolves the error.

Can I fix Error 23 myself, or do I need a technician?

Many homeowners can resolve Error 23 by cleaning the filter and inspecting the drain hose for kinks or blockages. If the error persists after basic troubleshooting, contact a certified appliance technician.

Will Error 23 damage my Cove DW2450 if left unrepaired?

Yes, ignoring Error 23 can cause standing water to remain in the dishwasher, potentially leading to mold growth or motor damage. Address the issue promptly to avoid costly repairs.

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