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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
Misc. electrical/hardware diagram
Air Pressure
Part #B13701-30
The manufacturer no longer makes this part, and there's no substitute part
Misc. electrical/hardware diagram
Air Pressure
Part #B13701-32
The manufacturer no longer makes this part, and there's no substitute part
Heat exchanger assembly diagram
Limit, 160f,
Part #B13700-08
The manufacturer no longer makes this part, and there's no substitute part
Casing diagram
Casing Assembly
Part #18161-31S
The manufacturer no longer makes this part, and there's no substitute part
Heat exchanger assembly diagram
Secondary Air Door (gus100-4)
Part #18820-08
The manufacturer no longer makes this part, and there's no substitute part
Heat exchanger assembly diagram
Manifold Bra
Part #18159-02
The manufacturer no longer makes this part, and there's no substitute part
Gas train diagram
Manifold, 3
Part #B18264-13
The manufacturer no longer makes this part, and there's no substitute part
Gas train diagram
Burner Assembly
Part #B18225-12
The manufacturer no longer makes this part, and there's no substitute part
Heat exchanger assembly diagram
Burner Box T
Part #18823-01
The manufacturer no longer makes this part, and there's no substitute part
Casing diagram
Furnace Blower Door
Part #18223-40
The manufacturer no longer makes this part, and there's no substitute part
Symptoms for gas ranges
Main causes: gas supply problem, faulty pressure regulator, clogs in burner or orifice, control system failure, faulty t…
Main causes: burner igniter switch failure, bad spark module, dirty or damaged spark electrode, wiring failure…
Repair guides for gas ranges
How to replace a gas range oven igniter
If your gas oven doesn't heat up, the problem could be a faulty oven igniter. These step-by-step instructions guide you …
Repair time and Difficulty
45 minutes or less
How to replace an oven temperature sensor on a gas range
See how to replace an oven temperature sensor on a gas range.…
Repair time and Difficulty
15 minutes or less
How to replace a gas range oven control board
These step-by-step instructions explain how to replace an oven control board on a gas range…
Repair time and Difficulty
15 minutes or less
Effective articles & videos to help repair your furnaces
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.…
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