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Janitrol GUN100-4B gas furnace Parts
Here are the diagrams and repair parts for Janitrol GUN100-4B gas furnace, as well as links to manuals and error code tables, if available.
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Browse Parts for GUN100-4B Gas Furnace
Casing diagram
Top Channel (gun050-2b, Gun075-3b, Gus050-2, Gus075-3)
Part #18221-04S
The manufacturer no longer makes this part, and there's no substitute part
Misc. electrical/hardware diagram
Air Pressure
Part #B13701-30
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
Gas train diagram
Pilot Assembly
Part #14010-03S
The manufacturer no longer makes this part, and there's no substitute part
Casing diagram
Casing Assembly
Part #18161-29S
The manufacturer no longer makes this part, and there's no substitute part
Casing diagram
Furnace Blower Door
Part #18223-42
The manufacturer no longer makes this part, and there's no substitute part
Misc. electrical/hardware diagram
Air Pressure
Part #B13701-31
The manufacturer no longer makes this part, and there's no substitute part
Blower assembly diagram
Blower Wheel
Part #B13680-34
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
Blower assembly diagram
Blower Shell
Part #18393-01
The manufacturer no longer makes this part, and there's no substitute part
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Repair time and Difficulty
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Repair time and Difficulty
15 minutes or less
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