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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
Blower assembly diagram
Blower Wheel
Part #B13680-46
The manufacturer no longer makes this part, and there's no substitute part
Misc. electrical/hardware diagram
Timed Fan
Part #B18099-03
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
Heat exchanger assembly diagram
Heat Exchange
Part #18212-29S
The manufacturer no longer makes this part, and there's no substitute part
Misc. electrical/hardware diagram
Vent/comb Ai
Part #B18105-07
The manufacturer no longer makes this part, and there's no substitute part
Heat exchanger assembly diagram
Heat Exchange
Part #18212-28S
The manufacturer no longer makes this part, and there's no substitute part
Gas train diagram
Ignition Mod
Part #B13707-26
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
Gasket Kit
Part #13926-103
The manufacturer no longer makes this part, and there's no substitute part
Heat exchanger assembly diagram
Burner Box T
Part #18823-02
The manufacturer no longer makes this part, and there's no substitute part
Symptoms for electric cooktops
Main causes: broken surface element, surface element switch failure, control system problem, surface element limiter swi…
Repair guides for electric cooktops
How to replace a coil surface element on an electric cooktop
Easily replace a coil surface element in 15 minutes or less by following these step-by-step instructions.…
Repair time and Difficulty
15 minutes or less
How to replace a radiant element on an electric cooktop
Follow these step-by-step instructions to replace a damaged radiant element on your electric cooktop when the element wo…
Repair time and Difficulty
45 minutes or less
How to replace the glass top on an electric cooktop
Don't use a cracked or damage glass cooktop—replace it, using these instructions to guide you.…
Repair time and Difficulty
30 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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