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Janitrol GUS100-4 gas furnace Parts
Here are the diagrams and repair parts for Janitrol GUS100-4 gas furnace, as well as links to manuals and error code tables, if available.
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Browse Parts for GUS100-4 Gas Furnace
Heat exchanger assembly diagram
Limit, 240f,
Part #B13700-03
The manufacturer no longer makes this part, and there's no substitute part
Heat exchanger assembly diagram
Secondary Ai
Part #18224-09
The manufacturer no longer makes this part, and there's no substitute part
Heat exchanger assembly diagram
Secondary Ai
Part #18820-06
The manufacturer no longer makes this part, and there's no substitute part
Casing diagram
Casing Assembly
Part #18161-38S
The manufacturer no longer makes this part, and there's no substitute part
Heat exchanger assembly diagram
Secondary He
Part #B18646-01
The manufacturer no longer makes this part, and there's no substitute part
Heat exchanger assembly diagram
Comb Box Frt
Part #18820-15
The manufacturer no longer makes this part, and there's no substitute part
Casing diagram
Casing Assembly
Part #18161-30S
The manufacturer no longer makes this part, and there's no substitute part
Heat exchanger assembly diagram
Flue Collector (gun050-2b, Gun075-3b, Gus050-2, Gus075-3)
Part #18812-14
The manufacturer no longer makes this part, and there's no substitute part
Blower assembly diagram
Blwr Asm,ser
Part #18682-05S
The manufacturer no longer makes this part, and there's no substitute part
Heat exchanger assembly diagram
Flue Restrictor (gun075-3b, Gus075-3)
Part #18248-01S
The manufacturer no longer makes this part, and there's no substitute part
Symptoms for gas grills
Choose a symptom to see related gas grill repairs.
Main cause: worn wheel…
Main causes: damaged or dirty flame tamers, corroded firebox, accumulated grease and debris in the grease pan…
Main causes: empty fuel tank, tripped flow-limiting device on the pressure regulator, faulty manifold valves, burner tub…
Main causes: nearly empty fuel tank, faulty pressure regulator, burner tube clogs, bad burner tube alignment to gas valv…
Main causes: clogged burner tubes, cracked insulators on igniter electrodes, wiring failures, bad ignition module, manif…
Repair guides for gas grills
These step-by-step repair guides will help you safely fix what’s broken on your gas grill.
How to replace a gas grill pressure regulator
You can install a new pressure regulator on your gas grill if the pressure regulator won’t let gas flow.…
Repair time and Difficulty
15 minutes or less
How to replace a gas grill igniter electrode
Replace the igniter electrode on your gas grill if it won’t light the burner.…
Repair time and Difficulty
15 minutes or less
How to replace a gas grill ignition module
Follow these steps to replace the ignition module if it doesn't produce a spark. …
Repair time and Difficulty
15 minutes or less
Effective articles & videos to help repair your furnaces
Use the advice and tips in these articles and videos to get the most out of your gas grill.
Get expert tips for preparing your furnace for winter. Follow maintenance tips to keep your furnace in top shape.…
Find out how new DOE standards going into effect in 2023 can affect you and what you need to do.…
Get answers to frequently asked questions about Sears and Sears PartsDirect.…
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