Can’t find your part?   Contact us:
+1-309-603-4777
Sears Parts Direct
Tips to find your model number
Orders

  • Keep track of the models you own in your profile

    Sign in or Register to view or add models

Schedule a repair
Speed Queen
Washer

Model # SWTH20WN Official Speed Queen commercial washer

Here are the diagrams and repair parts for Official Speed Queen SWTH20WN commercial washer, as well as links to manuals and error code tables, if available.

There are a couple of ways to find the part or diagram you need:

  • Click a diagram to see the parts shown on that diagram.
  • In the search box below, enter all or part of the part number or the part’s name.

Not all parts are shown on the diagrams—those parts are labeled NI, for “not illustrated”.

We encourage you to save the model to your profile, so it’s easy to access parts and manuals for your appliance whenever you log in.

For DIY troubleshooting advice and repair guides, visit our repair help section.

Error Codes

Model diagram and schematic

SEARCH WITHIN THIS MODEL

?

This is the number corresponding to the part on the diagram / schematic

Search
ALL PARTS
Showing 10 of 281 parts  |
Screw 503688
#6

Security kit diagram

Screw

Part #503688

Replaced by #WP3390631

?
Manufacturer substitution
This part replaces 503688. Substitute parts can look different from the original.
BEST SELLER
This item is not returnable
$4.39 | 
19% OFF Phone Price : $5.39
In Stock
Washer Drain Pump 201566P
#17

Motor assy diagram

Washer drain pump

Part #201566P

$57.42
In Stock
Washer Drive Motor 38034P
#3

Motor assy diagram

Washer drive motor

Part #38034P

The manufacturer no longer makes this part, and there's no substitute part

Washer Agitator Screw And O-ring 39432
#12

Agitator assy diagram

Washer agitator screw and o-ring

Part #39432

The manufacturer no longer makes this part, and there's no substitute part

Washer Drive Block 39508P
#11

Agitator assy diagram

Washer drive block

Part #39508P

$50.82
In Stock
Washer Start Capacitor 37377
#26

Motor assy diagram

Washer start capacitor

Part #37377

The manufacturer no longer makes this part, and there's no substitute part

Hose Clamp 36801
#14

Valve assy diagram

Hose clamp

Part #36801

This item is not returnable
$5.89
In Stock
Screw 35369
Screw

Part #35369

This item is not returnable
$4.91
In Stock
Washer 37772
#28

Motor assy diagram

Washer

Part #37772

This item is not returnable
$2.16
In Stock
Washer Idler Spring 202032
#6A

Motor assy diagram

Washer idler spring

Part #202032

The manufacturer no longer makes this part, and there's no substitute part

Most common symptoms to help you fix your washers

Choose a symptom to see related washer repairs.

View all

Why won't my washing machine drain?

Main causes: clogged drain hose, house drain clogged, bad drain pump, water-level pressure switch failure, bad control b…

Read more

Why won't my washing machine agitate or spin?

Main causes: worn agitator dogs, bad clutch, broken motor coupler, shifter assembly failure, broken door lock, suspensio…

Read more

Why won't my washing machine start?

Main causes: bad lid switch or door lock, bad timer or electronic control board, wiring failure, bad water inlet valve a…

Read more

Why your washing machine won't finish its cycle

Main causes: broken lid switch or lid lock, bad pressure switch, broken shifter assembly, faulty control system…

Read more

Why is my washing machine noisy or shaking?

Main causes: unbalanced load, loose spanner nut, worn drive block, broken shock absorber or suspension spring, debris in…

Read more

Why won't my washing machine fill?

Main causes: no water supply, bad water valves, water-level pressure switch failure, control system failure, bad door lo…

Read more

Why doesn't my washing machine work at all?

Main causes: lack of electrical power, wiring failure, bad power cord, electronic control board failure, bad user interf…

Read more

Why does my washing machine overfill?

Main causes: leaky water inlet valve, faulty water-level pressure switch, bad electronic control board…

Read more

Why is the water in my washing machine the wrong temperature?

Main causes: water heater failure, bad water temperature switch, faulty control board, bad water valve, faulty water tem…

Read more

Repair guides for gas pressure washers

These step-by-step repair guides will help you safely fix what’s broken on your pressure washer.

View all
How to install a pressure washer O-ring kit

How to install a pressure washer O-ring kit

O-rings seal fittings on the pressure washer pump. Damaged seals allow water to leak from the pump. Follow these steps t…

Read more
Repair difficulty
Time required
 45 minutes or less
How to install a pressure washer check valve kit

How to install a pressure washer check valve kit

Air in the inlet water supply can damage the check valves. If the pump won’t build up pressure due to damaged check valv…

Read more
Repair difficulty
Time required
 120 minutes or less
How to install a pressure washer chemical injection kit

How to install a pressure washer chemical injection kit

The chemical injection valve draws detergent into the pump. If it’s not drawing detergent, use a repair kit to replace t…

Read more
Repair difficulty
Time required
 15 minutes or less

Effective articles & videos to help repair your washers

Use the advice and tips in these articles and videos to get the most out of your washer.

View all
How to use your washing machine efficiently

How to use your washing machine efficiently

Find tips for using your washing machine efficiently to save energy and help reduce utility bills.…

Read more
How to enjoy all the online benefits we offer on our Sears PartsDirect website

How to enjoy all the online benefits we offer on our Sears PartsDirect website

Learn about all the convenient features on our Sears PartsDirect website that make your parts purchases easier.…

Read more
Top questions about Sears and Sears PartsDirect

Top questions about Sears and Sears PartsDirect

Get answers to frequently asked questions about Sears and Sears PartsDirect.…

Read more

Parts & More