Samsung Washer Door Lock Switch Parts — Models & Compatibility

Your Samsung washer won't start, and you hear nothing when you close the door. No clicks, no beeps — just silence. The door lock switch assembly (DC34-00025B) is Samsung's primary door interlock mechanism, and when it fails, your washer becomes a very expensive laundry basket. This hub covers which Samsung front-load and top-load models use this specific switch assembly.

Is This the Right Part for Your Model?

The DC34-00025B door lock switch replaces several Samsung part numbers including AP5799391, PS8763546, and 3990149. Before ordering, you'll need your exact model number — it's usually on a silver sticker inside the door frame or along the top edge when you open the washer lid. Samsung model numbers typically start with "WF" for front-loaders or "WA" for top-loaders, followed by capacity numbers and letter codes.

This switch fits across multiple Samsung series from 2014-2018, including the WF42H series (4.2 cu ft front-loaders), WF45H series (4.5 cu ft models), and select top-load washers in the WB09H line. The key identifier is the door locking mechanism design — if your washer has a plastic door latch assembly with a three-wire connector, this is likely your part.

About This Replacement Part

The DC34-00025B is Samsung's door lock switch assembly, which serves two critical functions: it physically locks the door during the wash cycle and signals the control board that it's safe to start filling. When this component fails, you'll typically see one of three scenarios: the door won't lock at all (washer displays door error codes like dE, dE1, or dC), the door locks but the cycle won't start, or the door stays locked after the cycle completes. The switch assembly includes the locking mechanism, microswitch contacts, and wiring harness in one integrated unit.

Compatible Samsung Washer Models

This door lock switch fits the following Samsung washer models. If you don't see your exact model listed, check for variants with different suffix codes (the letters/numbers after the slash) — Samsung often uses the same core parts across minor model revisions.

• WB09H7300GP/A1 — Top-load washer series
• WB09H7300GW/A1 — Top-load washer series
• WF42H5000AW/A2 — 4.2 cu ft front-load washer
• WF42H5200AF/A2 — 4.2 cu ft front-load washer
• WF42H5200AP/A2 — 4.2 cu ft front-load washer
• WF42H5200AW/A2 — 4.2 cu ft front-load washer
• WF42H5400AF/A2 — 4.2 cu ft front-load washer
• WF42H5400AW/A2 — 4.2 cu ft front-load washer
• WF42H5600AP/A2 — 4.2 cu ft front-load washer
• WF42H5600AW/A2 — 4.2 cu ft front-load washer

This list represents the most common models, but the DC34-00025B switch is used across Samsung's entire H-series washer lineup from the mid-2010s. Your specific model might have different color codes (AF=silver, AW=white, AP=platinum) but uses the same internal door lock mechanism.

Installation Overview

Replacing the door lock switch requires accessing the front panel of your Samsung washer. You'll need to remove the door boot clamp, peel back the rubber door seal, and disconnect the existing switch from its mounting bracket. The replacement part includes the full assembly, so you're swapping the entire unit rather than individual components. Most DIYers complete this repair in 30-45 minutes with basic hand tools — primarily a screwdriver and needle-nose pliers for the wire clamp.

Why This Part Fails

Samsung door lock switches fail from repeated thermal cycling and mechanical stress. The plastic housing becomes brittle over time, especially in high-humidity laundry rooms. The microswitch contacts inside wear out from thousands of open-close cycles, and the locking solenoid can burn out if the washer repeatedly attempts to lock against an obstruction. If you've been forcing the door closed or pulling it open while it's locked, you've likely accelerated wear on the mechanism. Water intrusion from a deteriorating door boot seal can also corrode the electrical contacts.

Verifying the Diagnosis

Before ordering this part, manually test your door lock. Close the door and start a cycle — you should hear a distinct click within 2-3 seconds. If you hear nothing, or if you hear rapid clicking (like a relay chattering), the lock switch is likely dead. Check the wire harness connector for corrosion or loose pins. If the wiring looks good but the lock doesn't engage, the switch assembly itself has failed. Samsung washers won't start any cycle without receiving the proper door-locked signal from this component.

Finding Your Model Number

Samsung stamps the model and serial number in several locations depending on your washer type. Front-load models have a sticker inside the door frame (open the door and look along the inner edge). Top-load washers typically have the tag under the lid along the rear or side rim. Write down the complete model number including all letters and numbers after the slash — that suffix indicates the specific revision and helps confirm parts compatibility.

Cross-Reference Part Numbers

The DC34-00025B supersedes and replaces these Samsung part numbers:

• AP5799391
• PS8763546
• 3990149

If your original Samsung parts diagram lists any of these numbers, the DC34-00025B is the current replacement. Samsung occasionally updates part numbers when they make minor manufacturing changes, but the mounting points and electrical connections remain identical across these variations.