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GMC GUN075-3B gas furnace Parts
Here are the diagrams and repair parts for GMC GUN075-3B gas furnace, as well as links to manuals and error code tables, if available.
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Browse Parts for GUN075-3B Gas Furnace
Gas train diagram
Burner Assembly
Part #B18225-10
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
Heat exchanger assembly diagram
Gasket Kit
Part #13926-103
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
Gas train diagram
Manifold, 5
Part #B18264-19
The manufacturer no longer makes this part, and there's no substitute part
Heat exchanger assembly diagram
Flue Restrictor (gun050-2b, Gus050-2)
Part #18248-00S
The manufacturer no longer makes this part, and there's no substitute part
Misc. electrical/hardware diagram
Door Switch
Part #B13708-18
The manufacturer no longer makes this part, and there's no substitute part
Heat exchanger assembly diagram
Hose Clamp #
Part #B18100-00
The manufacturer no longer makes this part, and there's no substitute part
Heat exchanger assembly diagram
Burner Box T
Part #18823-00
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
Symptoms for top-mount refrigerators
Main causes: frozen or clogged defrost drain tube, cracked water system tubing…
Repair guides for top-mount refrigerators
How to replace the light switch in a top-freezer refrigerator
The light switch turns the refrigerator light on and off and monitors door position. Replace the light switch if it does…
Repair time and Difficulty
15 minutes or less
How to replace the water inlet valve in a top-freezer refrigerator
The water inlet valve controls water flow to the ice maker. Replace the water valve if it doesn't open or shut properly.…
Repair time and Difficulty
15 minutes or less
How to replace the compressor run capacitor in a top-freezer refrigerator
The run capacitor sends electric current to the compressor motor to help the motor run efficiently. Replace the run capa…
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.…
Get answers to frequently asked questions about Sears and Sears PartsDirect.…
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