Model # 400DVX-R NAT Official Williams wall furnace

Here are the diagrams and repair parts for Official Williams 400DVX-R-NAT 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 66 parts |

All parts diagram

Casing assembly

Part #11C42-2

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

#47

All parts diagram

Burn spacer

Part #P018100

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

#28

All parts diagram

Extension assembly

Part #11A97

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

#25

All parts diagram

Gasket

Part #P151900

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

All parts diagram

Baffle hndl

Part #11C63

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

All parts diagram

Fan shroud

Part #11B86

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

#43

All parts diagram

Furnace burner flame sensor

Part #P271100

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

#NI

All parts diagram

Owner's manual

Part #P321004

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

#19

All parts diagram

Furnace fan blade

Part #P200600

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

#20

All parts diagram

Switch box

Part #11B05

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

Repair guides for bottom-mount refrigerators

How to replace a door gasket in a French-door refrigerator

The door gasket, often called a door seal, seals the gap around the door to keep the cold air in and the warm air out. R…

Repair difficulty

Time required

15 minutes or less

How to replace a refrigerator water valve

Replace the water valve that feeds water to the ice maker and water dispenser if it no longer controls the flow of water…

Repair difficulty

Time required

15 minutes or less

How to replace a refrigerator defrost control assembly

Follow these steps to replace the defrost control assembly if your Kenmore or LG French door refrigerator displays an er…

Repair difficulty

Time required

120 minutes or less

Articles and videos for bottom-mount refrigerators

How to Replace the Water Filter in a GE Refrigerator

Model # 400DVX-R NAT Official Williams wall furnace

Model diagram and schematic

SEARCH WITHIN THIS MODEL

Repair guides for bottom-mount refrigerators

How to replace a door gasket in a French-door refrigerator

How to replace a refrigerator water valve

How to replace a refrigerator defrost control assembly

Articles and videos for bottom-mount refrigerators

How to Replace the Water Filter in a GE Refrigerator

How to Replace the Water Filter in a Maytag Refrigerator

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

Parts & More

Stay Connected

Quick links

Let us help you

More resources