How to Fix OC overflow error on Samsung DW80CG5451SR

OC overflow error

This step-by-step repair guide walks you through fixing oc overflow error on your Samsung DW80CG5451SR. 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 your Samsung DW80CG5451SR dishwasher is triggering the OC overflow error and needs immediate attention.

• The dishwasher display shows the “OC” error code mid-cycle
• Water is pooling at the bottom of the dishwasher tub and not draining
• The dishwasher stops running and the door lock engages unexpectedly
• You notice water leaking onto the floor beneath the appliance

This error is most commonly caused by a faulty water inlet valve that won’t shut off, a clogged drain filter or drain hose, or a failed float switch that can no longer detect rising water levels properly.

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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

• Overflow/float switch
• water inlet valve
• dry towels
• multimeter

Step-by-Step Repair Instructions

Step 1

Disconnect power at the breaker before touching any components — water and electricity are a dangerous combination. Remove the kick plate using a T20 Torx driver (two screws) and inspect the base pan; the OC error means the overflow sensor has detected standing water in the pan, which is what triggers the fault. Dry the base pan thoroughly with towels, since the dishwasher won’t reset until that water is gone.

Step 2

The inlet valve is the most common OC culprit — if it fails to close fully at the end of the fill cycle, water keeps trickling in until it overflows into the base pan. Set your multimeter to Rx1 and probe the solenoid terminals; a healthy valve reads 200–500Ω, while an open or shorted reading means the solenoid has failed. Replace the inlet valve if it falls outside that range or if you can hear it continuing to drip after the fill cycle ends.

Step 3

The float switch is the sensor that tells the control board the base pan has water in it, so if it’s stuck or faulty it either triggers a false OC or fails to catch a real overflow. Lift the float manually to simulate a high-water condition, then test across the switch terminals on Rx1 — it should trip to an open circuit when the float is raised. Replace the switch if it doesn’t open, since a switch that stays closed will keep triggering OC even after the water is cleared.

Step 4

High household water pressure can physically overpower an inlet valve and prevent it from sealing completely, causing a slow continuous fill that eventually overflows. Check your supply line pressure with an inexpensive gauge at the dishwasher shutoff valve; if it exceeds 120 PSI, the valve cannot reliably close against that force. Install a pressure reducing valve (PRV) on the supply line — this is a cheap fix that also protects the rest of your plumbing.

Step 5

Before restoring power, make absolutely sure the base pan is completely dry and the float is sitting back down in its resting position — a wet pan or raised float will immediately re-trigger the OC error. Reconnect power, then run a Quick Wash cycle while watching the base pan through the kick plate opening for any new water appearing. Catching a fresh drip during the cycle helps you confirm whether the root cause has been resolved or if a second failure point exists.

Step 6

The OC error code will clear on its own once the base pan is dry and the control board no longer sees the float switch triggered — there is no separate reset procedure required. If the error returns after the repair, re-inspect the base pan during a live cycle rather than assuming the first fix was sufficient, as multiple failure points (valve and pressure, for example) can exist simultaneously.

Where to Buy Replacement Parts

Find genuine OEM and aftermarket replacement parts for your Samsung DW80CG5451SR on Amazon:

• Samsung DW80CG5451SR overflow sensor replacement DD82-01032A
• Samsung dishwasher water inlet valve solenoid 1611001
• Samsung dishwasher anti-flood float switch replacement

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 repairs for the OC overflow error on your Samsung DW80CG5451SR typically cost between $10–$80, depending on whether you need a new float switch, drain hose, or water inlet valve. A professional service call usually runs $150–$300 once you factor in labor and parts markups. Tackling this repair yourself can save you $100 or more.

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Frequently Asked Questions

What causes the OC overflow error on the Samsung DW80CG5451SR?

The OC error typically occurs when the dishwasher detects excess water in the base pan, often caused by a faulty water inlet valve, a clogged drain, or a damaged door gasket. Identifying the source of the leak early can prevent motor and control board damage.

Can I reset the OC error without calling a technician?

Yes, you can try resetting the dishwasher by powering it off, tilting it slightly to drain water from the base pan, and restarting it. However, if the error returns, an underlying issue needs professional attention.

Is it safe to keep using the dishwasher while the OC error is active?

No, you should stop using the appliance immediately to avoid electrical hazards or further water damage to your flooring and cabinetry. Address the repair before running another cycle.