Whirlpool WFW4090N Parts & Replacement Numbers

Before you touch anything: unplug the washer and close both water supply valves. Disconnect the drain hose if you are working on the pump. Parts behind the control console carry mains voltage even when the machine is idle. Anything on a gas appliance must be handled by a licensed technician.

We do not have a verified part list for the Whirlpool WFW4090N. A guessed part number is worse than no part number: it costs you a return, a week of waiting and sometimes a second repair.

How to get the right number

Find the model and serial plate on the machine.
Go to Whirlpool's own parts site and enter the full model string including the suffix.
Use the exploded diagram to identify the part by position, not by description.
Write the number down and search it on a second supplier to compare price.

Parts that fit this washer family

Why we do not guess

Appliance parts look interchangeable and are not. Two drain pumps with the same shape can differ in impeller diameter and mounting flange by a few millimetres; two fill valves with the same body can open in opposite directions. A supplier listing that says “fits most Whirlpool washers” is telling you it has not checked your model either.

A wrong part number costs you the return shipping, a week without a working machine, and in the case of a valve or a pump, sometimes a second repair when the wrong component fails and takes something else with it. We would rather show nothing on this page than send you shopping with a number we invented.

How to identify a part without a number

If you cannot find the number, work by position rather than description. Every manufacturer publishes an exploded diagram for each model: find your model, then find the component on the diagram by where it sits, not by what it looks like. The diagram carries the number next to the part. That number is the one to search — descriptions like “drain pump” or “water valve” return dozens of near-identical results and no way to tell them apart.

Take a photograph before you take anything apart. Washers have a specific order of assembly around the pump and the drive, and a photo of the hose routing will save you an hour on reassembly.

Before you order anything

Safety: unplug the washer and close both water supply valves. If the machine has standing water, bail or drain it before you open the pump housing — a washer holds several gallons even after a failed cycle.

Confirm three things before you pay: the seller lists your full model string including the suffix, the part number in the listing matches the one on the diagram, and the return window is long enough to cover the repair. Keep the old part until the new one is fitted and working.

More for the WFW4090N

How the WFW4090N differs from its closest siblings

These are the models most often confused with the WFW4090N. The differences below are computed from our own records, not copied from a marketing sheet.

vs WFH5424S

0.8 cu ft larger drum (2.8 vs 2)
2.3000000000000007 in shallower/shorter (23.7 vs 26 in)
14 kWh/yr less energy (80 vs 94)
140 gal/yr more water (2,643 vs 2,503)
1 variants listed for the WFH5424S vs 0 here

Shared: both front load.

vs WEF5727T

2.5 cu ft larger drum (4.5 vs 2)
1 in deeper/taller (27 vs 26 in)
6 in deeper/taller (32 vs 26 in)
46 kWh/yr more energy (140 vs 94)
1,745 gal/yr more water (4,248 vs 2,503)
an official PDF is published for the WEF5727T but not for this one

Shared: both front load.

Where this data comes from

Part numbers and descriptionshttps://www.partselect.com/Models/WFW4090N/checked 2026-10-26

One source is listed above because it is the only place this page draws from. We publish facts we can point to — no republished manual text, no hosted PDFs, no invented model numbers or error codes.