How to Replace the Drain Pump on a Samsung WA45T3400AW Washer — Step-by-Step Instructions
Step-by-step instructions for the Samsung WA45T3400AW (top-load washer, 4.5 cu ft). Parts and access points can differ slightly by production year — the steps below cover the common layout for this platform, and the model notes flag its quirks.
Unplug the washer and drain it first (see the pump-filter guide for the drain hose trick). Residual water WILL come out of the hoses — pan and towels ready.
Tools
- Nut driver / socket set
- Pliers for hose clamps
- Shallow pan + towels
- Phone camera
Parts
- Drain pump matched to your model number
Step by step
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1 Confirm the pump is dead
Clean the filter first — half of "dead pump" calls are a clogged trap. A pump that hums with a clear filter, grinds, or is silent during drain is genuinely done.
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2 Get access
Front-loaders: remove the lower front panel (a few screws under the lip). Top-loaders: tilt the machine back or remove the rear/front panel per your model — the pump sits at the tub’s lowest point.
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3 Photograph, then disconnect
Photo the hose routing and wiring plug. Release the spring clamps with pliers, wiggle the hoses off into your pan, and unplug the electrical connector.
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4 Swap the pump
Most pumps mount with 2–3 screws or a twist-lock bayonet. Transfer to the new pump, reconnect hoses (clamps seated past the bead) and the plug.
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5 Leak-test before closing
Run a small fill and a drain cycle with the panel still off and watch every connection, then button it up.
Samsung WA45T3400AW notes & error codes
In hard-water areas the inlet screens on these scale up within a few years and produce a slow-fill complaint that reads like a failing valve. Pull and clean the screens before condemning the valve — it is often the entire repair.
| Code | What it means |
|---|---|
| 5E | Not draining |
| 4C | Water supply fault |
| UB | Unbalanced load |
| dC | Lid open during operation |
| 3C | Motor or hall sensor fault |
Full details for this machine — common problems, causes, and costs — are in the Samsung WA45T3400AW repair guide. The general version of these instructions is here.
If a new pump still won’t run, the control board isn’t sending it power — that diagnosis needs a meter and a wiring diagram, which is a fast pro visit instead of a parts guessing game. If you'd rather skip it entirely, find a washer repair pro near you →
What this repair costs professionally
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