Model # 400 DVX Official Williams wall furnace

Here are the diagrams and repair parts for Official Williams 400-DVX wall furnace, 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.

Model diagram and schematic

SEARCH WITHIN THIS MODEL

ALL PARTS

Showing 10 of 61 parts |

#45

Replacement parts diagram

Thermocouple

Part #P028500

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

#51

Replacement parts diagram

Thermostat

Part #P106400

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

#21

Replacement parts diagram

Furnace fan blade

Part #P200600

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

#20

Replacement parts diagram

Furnace motor isolator

Part #P022800

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

#27

Replacement parts diagram

Gasket

Part #P151900

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

Replacement parts diagram

Trim cover

Part #11A40

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

#21A

Replacement parts diagram

Furnace blower fan wheel

Part #P014300

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

#47

Replacement parts diagram

Tube seal

Part #11A41

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

#50

Replacement parts diagram

Burn spacer

Part #P018100

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

#31

Replacement parts diagram

Extension assembly

Part #11B49

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

Symptoms for gas ranges

Why won't my range's gas burner spark or ignite?

Main causes: burner igniter switch failure, bad spark module, dirty or damaged spark electrode, wiring failure…

Why isn't my range's gas burner heating properly?

Main causes: gas supply problem, faulty pressure regulator, clogs in burner or orifice, control system failure, faulty t…

How to replace oven door hinges on a gas range

See how to replace the oven door hinges on a gas range yourself, in just 30 minutes.…

Repair difficulty

Time required

15 minutes or less

How to replace a range spark module

Follow these step-by-step instructions to put the fire back into the surface burners on your gas range by replacing the …

Repair difficulty

Time required

30 minutes or less

How to replace a range spark igniter switch

Follow these steps to replace the spark igniter switch—sometimes called a burner switch or spark switch—on a gas or dual…

Repair difficulty

Time required

60 minutes or less

Articles and videos for gas ranges

Model # 400 DVX Official Williams wall furnace

Model diagram and schematic

SEARCH WITHIN THIS MODEL

Symptoms for gas ranges

Why won't my range's gas burner spark or ignite?

Why isn't my range's gas burner heating properly?

Repair guides for gas ranges

How to replace oven door hinges on a gas range

How to replace a range spark module

How to replace a range spark igniter switch

Articles and videos for gas ranges

How to clean and maintain your stove

Oven won't heat: troubleshooting gas range problems video

How to clean grates and burners on a gas cooktop video

Parts & More

Stay Connected

Quick links

Let us help you

More resources