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Goodman GMTH045-3B gas furnace Parts
Here are the diagrams and repair parts for Goodman GMTH045-3B gas furnace, as well as links to manuals and error code tables, if available.
Installation guide
By Schematic
SELECT DIAGRAM
Browse Parts for GMTH045-3B Gas Furnace
Misc. components/drain kit assembly diagram
Furnace Vent Air Pressure Switch
Part #B1370179
The manufacturer no longer makes this part, and there's no substitute part
Burner box assembly diagram
Burner Box Top 3 Cell (m3, M4, M8, M9, M10, M17, M18, M19, M20, M21, M22, M23)
Part #4013006
The manufacturer no longer makes this part, and there's no substitute part
Wrapper assembly diagram
Door-accs
Part #4812001P
The manufacturer no longer makes this part, and there's no substitute part
Wrapper assembly diagram
Wrapper/insulation Assembly, 14" (gdt045-3b, Gdt070-3b)
Part #4026512S
The manufacturer no longer makes this part, and there's no substitute part
Wrapper assembly diagram
Panel
Part #4815800
The manufacturer no longer makes this part, and there's no substitute part
Wrapper assembly diagram
Wrapper/insulation Assembly, 24.5" (gmnt120-5b)
Part #4826503S
The manufacturer no longer makes this part, and there's no substitute part
Burner box assembly diagram
Rack
Part #2513502
The manufacturer no longer makes this part, and there's no substitute part
Wrapper assembly diagram
Door-blwr
Part #2515009
The manufacturer no longer makes this part, and there's no substitute part
Wrapper assembly diagram
Door-blwr
Part #2515010
The manufacturer no longer makes this part, and there's no substitute part
Misc. components/drain kit assembly diagram
Drain Kit
Part #B4810708
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.…
Get answers to frequently asked questions about Sears and Sears PartsDirect.…
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