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

  • Keep track of the models you own in your profile

    Sign in or Register to view or add models

Schedule a repair
Williams
Wall Heater

Model # 450 FX-R LPG Official Williams wall furnace

Here are the diagrams and repair parts for Official Williams 450-FX-R-LPG 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

?

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

Search
ALL PARTS
Showing 10 of 86 parts  |
Thermocouple P042100

#47

All parts diagram

Thermocouple

Part #P042100

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

Thermostat P106400

#46

All parts diagram

Thermostat

Part #P106400

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

Cont Unit P271000

#53A

All parts diagram

Cont unit

Part #P271000

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

Module P321096

#53

All parts diagram

Module

Part #P321096

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

Outer Casing 7C55-2

#1A

All parts diagram

Outer casing

Part #7C55-2

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

Junction Box 7B29

#23

All parts diagram

Junction box

Part #7B29

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

Header Assy 7B114

#18A

All parts diagram

Header assy

Part #7B114

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

Base Gasket P026500

#12

All parts diagram

Base gasket

Part #P026500

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

Switch Box 11B05

#7

All parts diagram

Switch box

Part #11B05

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

Burn Spacer P018100

#49

All parts diagram

Burn spacer

Part #P018100

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

Symptoms for gas line trimmers

Choose a symptom to see related grass line trimmer repairs.

View all

Why won't my gas line trimmer start?

Main causes: stale fuel, cracked fuel lines, dirty carburetor, bad spark plug, worn piston rings…

Read more

Why does my gas line trimmer run rough?

Main causes: stale fuel, clogged fuel filter, faulty spark plug, clogged air filter, cracked fuel lines, clogged carbure…

Read more

Why does my gas line trimmer leak gas?

Main causes: cracked fuel lines, bad carburetor seals, leaky fuel tank cap, damaged fuel tank…

Read more

Repair guides for gas line trimmers

These step-by-step repair guides will help you safely fix what’s broken on your grass line trimmer.

View all
How to rebuild a line trimmer carburetor

How to rebuild a line trimmer carburetor

If the line trimmer engine won't start even though there's fuel in the tank, the carburetor could be the problem. Follow…

Read more
Repair difficulty
Time required
 15 minutes or less
How to replace a line trimmer carburetor

How to replace a line trimmer carburetor

If the line trimmer won't start even though there's fuel in the tank, the carburetor could be the problem. Follow these …

Read more
Repair difficulty
Time required
 15 minutes or less
How to replace a line trimmer fuel line

How to replace a line trimmer fuel line

The fuel line on a grass line trimmer deteriorates with time and eventually can split or crack. You can replace it yours…

Read more
Repair difficulty
Time required
 15 minutes or less

Articles and videos for gas line trimmers

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

View all
Top 10 electric lawn and garden tools for 2023

Top 10 electric lawn and garden tools for 2023

Learn about the top 10 must-have electric lawn & garden tools for 2023…

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
Grass line trimmer maintenance checklist

Grass line trimmer maintenance checklist

Find out how to take care of your grass line trimmer from the start of the trimming season until the end, with this help…

Read more

Parts & More