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GMC GUN125-4B gas furnace Parts
Here are the diagrams and repair parts for GMC GUN125-4B gas furnace, as well as links to manuals and error code tables, if available.
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Browse Parts for GUN125-4B Gas Furnace
Gas train diagram
Manifold, 5
Part #B18264-15
The manufacturer no longer makes this part, and there's no substitute part
Heat exchanger assembly diagram
Flue Restrictor (gun075-3b, Gus075-3)
Part #18248-01S
The manufacturer no longer makes this part, and there's no substitute part
Gas train diagram
Burner Assembly
Part #B18225-09
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
Blower assembly diagram
Blower Wheel
Part #B13680-34
The manufacturer no longer makes this part, and there's no substitute part
Blower assembly diagram
Blwr Asm,ser
Part #18682-00S
The manufacturer no longer makes this part, and there's no substitute part
Heat exchanger assembly diagram
Comb Box Frt
Part #18820-14
The manufacturer no longer makes this part, and there's no substitute part
Casing diagram
Ctl Access D
Part #18813-13P
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
Blower assembly diagram
Blower Shell
Part #18393-01
The manufacturer no longer makes this part, and there's no substitute part
Repair guides for side-by-side refrigerators
How to replace an electronic control board on the back of a refrigerator
If your refrigerator isn't running, an electronic control board failure could be the problem. A service technician can d…
Repair time and Difficulty
15 minutes or less
How to replace a press-in door gasket in a side-by-side refrigerator
The door gasket seals the gap around the door to keep the cold air in and the warm air out. Replace a worn or damaged do…
Repair time and Difficulty
15 minutes or less
How to replace an ice maker in a side-by-side refrigerator
Learn how to replace the ice maker in a side-by-side refrigerator with these step-by-step instructions.…
Repair time and Difficulty
30 minutes or less
Effective articles & videos to help repair your furnaces
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Parts & More
Parts
Blower Wheel 134-2513-01Handle 749-04693A-0637Home Electronics Coil 146005311Air Grid 00604148Home Electronics Flywheel YASFX013005Camshaft 209-32201-11Cabinet X25141021Label (trade 224-91635-03Lead Connector BN39-00441BC-film,mpp 2301-001251Link-mechan 797233Shrtblk St UP00739Home Electronics Knob 23874870Bkt,backing, 191337Home Electronics Shield 126-02715-01Home Electronics Holder YEFK04129Home Electronics Capacitor 022-07433HANDLE LATC 73-837Passive Woof TCG35228607PANEL- W/CON 52420100