WP3387746 — Identify, Test and Replace — Which Appliance Problems This Fixes

Understanding the Problem

Brief explanation: WP3387746 is an OEM Whirlpool-style part number. I was not able to confirm a single definitive manufacturer description from memory, because some WP numbers are used for multiple regional/seasonal parts or are listed only by dealer catalogs. That said, the steps below will help you identify exactly what WP3387746 is on your machine, test whether it’s failed, and replace it safely. Follow these numbered diagnostic and repair steps and then use the replacement checklist at the end. Step‑by‑step diagnostic and repair instructions: 1) Confirm the appliance and model number: Locate the appliance model & serial tag (usually inside the door opening, on the back, or on the door jamb). Record the model—this lets you confirm the exact OEM part list for WP3387746. 2) Cross‑reference the part: Use the recorded model on the Whirlpool parts site or an authorized parts dealer and search WP3387746. If the parts diagram shows the component location (control board, sensor, switch, fuse, etc.), note it. If the part listing is ambiguous, save the exploded view image and part description. 3) Physically locate the part: Unplug the appliance (and shut off gas if it’s a gas dryer). Access the panel indicated in the parts diagram (front, back, top). Locate the part and compare its label / molded numbers to the WP3387746 stamping—take a clear photo. 4) Visual inspection: Look for burn marks, melted connectors, broken plastic, detached wires, corrosion or a blown thermal fuse. Boards may have bulging capacitors or scorch marks. 5) Test electrically: - If it’s a fuse/thermal fuse: remove and test for continuity with a multimeter (should read near 0 ohms if good). - If it’s a temperature sensor/thermistor: test resistance at room temperature and compare to spec (commonly 10kΩ for many sensors, but verify spec for your model). - If it’s a switch (door, lid, or pressure switch): actuate the switch and check for continuity changes. - If it’s a control board or module: check incoming power to the board with the harness attached and appliance plugged in (use caution) and verify that outputs change when the machine is commanded to run. If you are not comfortable working with live voltages, skip this test and proceed to replacement. 6) Decide: If the part is open (no continuity) when it should be closed, has out‑of‑spec resistance, or shows physical damage, it needs replacement. If the part checks good electrically but symptoms persist, inspect harnesses, connectors, and the upstream/ downstream components (e.g., a bad thermostat vs. a bad heating element). 7) Replacement steps (generic): a) Unplug appliance and shut off gas (if applicable). Turn off water supply for washers. b) Remove the access panel(s) required to reach the part—refer to the model’s service manual or exploded parts diagram. c) Photograph and label every connector and wire you disconnect (masking tape + permanent marker works well). d) Remove mounting screws/clips holding WP3387746 in place. Carefully remove the part from its bracket or socket. e) Install the new WP3387746: position it, secure fasteners, and reconnect wiring exactly as removed. f) Reassemble panels and reconnect power (and gas/water). Run a short diagnostic or test cycle. 8) Verify operation: Run the appliance through a test cycle. Confirm symptoms are resolved and there are no leaks, unusual noises, error codes, or repeated failures. How to fix (practical): The real fix is to 1) confirm the part identity against your model, 2) verify the part has failed with a multimeter or visual inspection, and 3) replace it following the steps above. If replacing the part does not resolve the issue, broaden your diagnosis to wiring, connectors, or the appliance control board. Safety note: Always disconnect power before opening an appliance. For gas appliances, also shut the gas valve. If you must test live circuits, use insulated tools, or hire a technician. Capacitors on control boards can hold charge—discharge them before handling the board.

Common Symptoms

Symptoms vary by which component WP3387746 represents but commonly include: appliance won’t start, intermittent operation, specific error codes, no heat (dryer), door/lid won’t lock, or failure of the function controlled by the part.

Common Causes

• Component failure from age, heat, or mechanical wear
• Burned or corroded connectors and wiring causing open circuits
• Related control or sensor failures placing extra stress on the part

Popular Parts That Fix This Problem

These are the most common replacement parts that fix this problem. When you're ready to order, click below to find the right part at ProsourceParts.com — just search by your appliance model number for a guaranteed fit.

Frequently Asked Questions